sphinx.addnodesdocument)}( rawsourcechildren]( translations LanguagesNode)}(hhh](h pending_xref)}(hhh]docutils.nodesTextChinese (Simplified)}parenthsba attributes}(ids]classes]names]dupnames]backrefs] refdomainstdreftypedoc reftarget(/translations/zh_CN/networking/ip-sysctlmodnameN classnameN refexplicitutagnamehhh ubh)}(hhh]hChinese (Traditional)}hh2sbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/zh_TW/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hItalian}hhFsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/it_IT/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hJapanese}hhZsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/ja_JP/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hKorean}hhnsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/ko_KR/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hPortuguese (Brazilian)}hhsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/pt_BR/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubh)}(hhh]hSpanish}hhsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget(/translations/sp_SP/networking/ip-sysctlmodnameN classnameN refexplicituh1hhh ubeh}(h]h ]h"]h$]h&]current_languageEnglishuh1h hh _documenthsourceNlineNubhcomment)}(h SPDX-License-Identifier: GPL-2.0h]h SPDX-License-Identifier: GPL-2.0}hhsbah}(h]h ]h"]h$]h&] xml:spacepreserveuh1hhhhhhB/var/lib/git/docbuild/linux/Documentation/networking/ip-sysctl.rsthKubhsection)}(hhh](htitle)}(h IP Sysctlh]h IP Sysctl}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhhhhhKubh)}(hhh](h)}(h/proc/sys/net/ipv4/* Variablesh]h/proc/sys/net/ipv4/* Variables}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhhhhhKubhdefinition_list)}(hhh](hdefinition_list_item)}(hX ip_forward - BOOLEAN Forward Packets between interfaces. This variable is special, its change resets all configuration parameters to their default state (RFC1122 for hosts, RFC1812 for routers) Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](hterm)}(hip_forward - BOOLEANh]hip_forward - BOOLEAN}(hhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhhubh definition)}(hhh](h paragraph)}(h#Forward Packets between interfaces.h]h#Forward Packets between interfaces.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK hj ubj)}(hThis variable is special, its change resets all configuration parameters to their default state (RFC1122 for hosts, RFC1812 for routers)h]hThis variable is special, its change resets all configuration parameters to their default state (RFC1122 for hosts, RFC1812 for routers)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK hj ubj)}(hPossible values:h]hPossible values:}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubh bullet_list)}(hhh](h list_item)}(h 0 (disabled)h]j)}(hjCh]h 0 (disabled)}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjAubah}(h]h ]h"]h$]h&]uh1j?hj<ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjXubah}(h]h ]h"]h$]h&]uh1j?hj<ubeh}(h]h ]h"]h$]h&]bullet-uh1j:hhhKhj ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubeh}(h]h ]h"]h$]h&]uh1j hhubeh}(h]h ]h"]h$]h&]uh1hhhhKhhubh)}(hip_default_ttl - INTEGER Default value of TTL field (Time To Live) for outgoing (but not forwarded) IP packets. Should be between 1 and 255 inclusive. Default: 64 (as recommended by RFC1700) h](h)}(hip_default_ttl - INTEGERh]hip_default_ttl - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubj )}(hhh]j)}(hDefault value of TTL field (Time To Live) for outgoing (but not forwarded) IP packets. Should be between 1 and 255 inclusive. Default: 64 (as recommended by RFC1700)h]hDefault value of TTL field (Time To Live) for outgoing (but not forwarded) IP packets. Should be between 1 and 255 inclusive. Default: 64 (as recommended by RFC1700)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXip_no_pmtu_disc - INTEGER Disable Path MTU Discovery. If enabled in mode 1 and a fragmentation-required ICMP is received, the PMTU to this destination will be set to the smallest of the old MTU to this destination and min_pmtu (see below). You will need to raise min_pmtu to the smallest interface MTU on your system manually if you want to avoid locally generated fragments. In mode 2 incoming Path MTU Discovery messages will be discarded. Outgoing frames are handled the same as in mode 1, implicitly setting IP_PMTUDISC_DONT on every created socket. Mode 3 is a hardened pmtu discover mode. The kernel will only accept fragmentation-needed errors if the underlying protocol can verify them besides a plain socket lookup. Current protocols for which pmtu events will be honored are TCP and SCTP as they verify e.g. the sequence number or the association. This mode should not be enabled globally but is only intended to secure e.g. name servers in namespaces where TCP path mtu must still work but path MTU information of other protocols should be discarded. If enabled globally this mode could break other protocols. Possible values: 0-3 Default: FALSE h](h)}(hip_no_pmtu_disc - INTEGERh]hip_no_pmtu_disc - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK6hjubj )}(hhh](j)}(hX]Disable Path MTU Discovery. If enabled in mode 1 and a fragmentation-required ICMP is received, the PMTU to this destination will be set to the smallest of the old MTU to this destination and min_pmtu (see below). You will need to raise min_pmtu to the smallest interface MTU on your system manually if you want to avoid locally generated fragments.h]hX]Disable Path MTU Discovery. If enabled in mode 1 and a fragmentation-required ICMP is received, the PMTU to this destination will be set to the smallest of the old MTU to this destination and min_pmtu (see below). You will need to raise min_pmtu to the smallest interface MTU on your system manually if you want to avoid locally generated fragments.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(hIn mode 2 incoming Path MTU Discovery messages will be discarded. Outgoing frames are handled the same as in mode 1, implicitly setting IP_PMTUDISC_DONT on every created socket.h]hIn mode 2 incoming Path MTU Discovery messages will be discarded. Outgoing frames are handled the same as in mode 1, implicitly setting IP_PMTUDISC_DONT on every created socket.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK%hjubj)}(hX6Mode 3 is a hardened pmtu discover mode. The kernel will only accept fragmentation-needed errors if the underlying protocol can verify them besides a plain socket lookup. Current protocols for which pmtu events will be honored are TCP and SCTP as they verify e.g. the sequence number or the association. This mode should not be enabled globally but is only intended to secure e.g. name servers in namespaces where TCP path mtu must still work but path MTU information of other protocols should be discarded. If enabled globally this mode could break other protocols.h]hX6Mode 3 is a hardened pmtu discover mode. The kernel will only accept fragmentation-needed errors if the underlying protocol can verify them besides a plain socket lookup. Current protocols for which pmtu events will be honored are TCP and SCTP as they verify e.g. the sequence number or the association. This mode should not be enabled globally but is only intended to secure e.g. name servers in namespaces where TCP path mtu must still work but path MTU information of other protocols should be discarded. If enabled globally this mode could break other protocols.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK)hjubj)}(hPossible values: 0-3h]hPossible values: 0-3}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK4hjubj)}(hDefault: FALSEh]hDefault: FALSE}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK6hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhK6hhhhubh)}(hmin_pmtu - INTEGER default 552 - minimum Path MTU. Unless this is changed manually, each cached pmtu will never be lower than this setting. h](h)}(hmin_pmtu - INTEGERh]hmin_pmtu - INTEGER}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK:hj(ubj )}(hhh]j)}(hxdefault 552 - minimum Path MTU. Unless this is changed manually, each cached pmtu will never be lower than this setting.h]hxdefault 552 - minimum Path MTU. Unless this is changed manually, each cached pmtu will never be lower than this setting.}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK9hj:ubah}(h]h ]h"]h$]h&]uh1j hj(ubeh}(h]h ]h"]h$]h&]uh1hhhhK:hhhhubh)}(hXip_forward_use_pmtu - BOOLEAN By default we don't trust protocol path MTUs while forwarding because they could be easily forged and can lead to unwanted fragmentation by the router. You only need to enable this if you have user-space software which tries to discover path mtus by itself and depends on the kernel honoring this information. This is normally not the case. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hip_forward_use_pmtu - BOOLEANh]hip_forward_use_pmtu - BOOLEAN}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKJhjWubj )}(hhh](j)}(hXTBy default we don't trust protocol path MTUs while forwarding because they could be easily forged and can lead to unwanted fragmentation by the router. You only need to enable this if you have user-space software which tries to discover path mtus by itself and depends on the kernel honoring this information. This is normally not the case.h]hXVBy default we don’t trust protocol path MTUs while forwarding because they could be easily forged and can lead to unwanted fragmentation by the router. You only need to enable this if you have user-space software which tries to discover path mtus by itself and depends on the kernel honoring this information. This is normally not the case.}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK=hjiubj)}(hPossible values:h]hPossible values:}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKEhjiubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKGhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKHhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhKGhjiubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKJhjiubeh}(h]h ]h"]h$]h&]uh1j hjWubeh}(h]h ]h"]h$]h&]uh1hhhhKJhhhhubh)}(hXefwmark_reflect - BOOLEAN Controls the fwmark of kernel-generated IPv4 reply packets that are not associated with a socket for example, TCP RSTs or ICMP echo replies). If disabled, these packets have a fwmark of zero. If enabled, they have the fwmark of the packet they are replying to. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hfwmark_reflect - BOOLEANh]hfwmark_reflect - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKWhjubj )}(hhh](j)}(hXControls the fwmark of kernel-generated IPv4 reply packets that are not associated with a socket for example, TCP RSTs or ICMP echo replies). If disabled, these packets have a fwmark of zero. If enabled, they have the fwmark of the packet they are replying to.h]hXControls the fwmark of kernel-generated IPv4 reply packets that are not associated with a socket for example, TCP RSTs or ICMP echo replies). If disabled, these packets have a fwmark of zero. If enabled, they have the fwmark of the packet they are replying to.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKMhjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKRhjubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKThjubah}(h]h ]h"]h$]h&]uh1j?hj ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKUhj%ubah}(h]h ]h"]h$]h&]uh1j?hj ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhKThjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKWhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKWhhhhubh)}(hXdfib_multipath_use_neigh - BOOLEAN Use status of existing neighbor entry when determining nexthop for multipath routes. If disabled, neighbor information is not used and packets could be directed to a failed nexthop. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h!fib_multipath_use_neigh - BOOLEANh]h!fib_multipath_use_neigh - BOOLEAN}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKdhj]ubj )}(hhh](j)}(hUse status of existing neighbor entry when determining nexthop for multipath routes. If disabled, neighbor information is not used and packets could be directed to a failed nexthop. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.h]hUse status of existing neighbor entry when determining nexthop for multipath routes. If disabled, neighbor information is not used and packets could be directed to a failed nexthop. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKZhjoubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK_hjoubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKahjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKbhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhKahjoubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKdhjoubeh}(h]h ]h"]h$]h&]uh1j hj]ubeh}(h]h ]h"]h$]h&]uh1hhhhKdhhhhubh)}(hXfib_multipath_hash_policy - INTEGER Controls which hash policy to use for multipath routes. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled. Default: 0 (Layer 3) Possible values: - 0 - Layer 3 - 1 - Layer 4 - 2 - Layer 3 or inner Layer 3 if present - 3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctl h](h)}(h#fib_multipath_hash_policy - INTEGERh]h#fib_multipath_hash_policy - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKrhjubj )}(hhh](j)}(h|Controls which hash policy to use for multipath routes. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.h]h|Controls which hash policy to use for multipath routes. Only valid for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKghjubj)}(hDefault: 0 (Layer 3)h]hDefault: 0 (Layer 3)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKjhjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKlhjubj;)}(hhh](j@)}(h 0 - Layer 3h]j)}(hj$h]h 0 - Layer 3}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKnhj"ubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 - Layer 4h]j)}(hj;h]h 1 - Layer 4}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKohj9ubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h'2 - Layer 3 or inner Layer 3 if presenth]j)}(hjRh]h'2 - Layer 3 or inner Layer 3 if present}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKphjPubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(hy3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctl h]j)}(hx3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctlh]hx3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctl}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKqhjgubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhKnhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKrhhhhubh)}(hXfib_multipath_hash_fields - UNSIGNED INTEGER When fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl. This value is a bitmask which enables various fields for multipath hash calculation. Possible fields are: ====== ============================ 0x0001 Source IP address 0x0002 Destination IP address 0x0004 IP protocol 0x0008 Unused (Flow Label) 0x0010 Source port 0x0020 Destination port 0x0040 Inner source IP address 0x0080 Inner destination IP address 0x0100 Inner IP protocol 0x0200 Inner Flow Label 0x0400 Inner source port 0x0800 Inner destination port ====== ============================ Default: 0x0007 (source IP, destination IP and IP protocol) h](h)}(h,fib_multipath_hash_fields - UNSIGNED INTEGERh]h,fib_multipath_hash_fields - UNSIGNED INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubj )}(hhh](j)}(hWhen fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl.h]hWhen fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKuhjubj)}(hTThis value is a bitmask which enables various fields for multipath hash calculation.h]hTThis value is a bitmask which enables various fields for multipath hash calculation.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKyhjubj)}(hPossible fields are:h]hPossible fields are:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhK|hjubhtable)}(hhh]htgroup)}(hhh](hcolspec)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjubhtbody)}(hhh](hrow)}(hhh](hentry)}(hhh]j)}(h0x0001h]h0x0001}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hSource IP addressh]hSource IP address}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0002h]h0x0002}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj3ubah}(h]h ]h"]h$]h&]uh1jhj0ubj)}(hhh]j)}(hDestination IP addressh]hDestination IP address}(hjMhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjJubah}(h]h ]h"]h$]h&]uh1jhj0ubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0004h]h0x0004}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjjubah}(h]h ]h"]h$]h&]uh1jhjgubj)}(hhh]j)}(h IP protocolh]h IP protocol}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjgubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0008h]h0x0008}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hUnused (Flow Label)h]hUnused (Flow Label)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0010h]h0x0010}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(h Source porth]h Source port}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0020h]h0x0020}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhj ubj)}(hhh]j)}(hDestination porth]hDestination port}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj&ubah}(h]h ]h"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0040h]h0x0040}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjFubah}(h]h ]h"]h$]h&]uh1jhjCubj)}(hhh]j)}(hInner source IP addressh]hInner source IP address}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj]ubah}(h]h ]h"]h$]h&]uh1jhjCubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0080h]h0x0080}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj}ubah}(h]h ]h"]h$]h&]uh1jhjzubj)}(hhh]j)}(hInner destination IP addressh]hInner destination IP address}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjzubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0100h]h0x0100}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hInner IP protocolh]hInner IP protocol}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0200h]h0x0200}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hInner Flow Labelh]hInner Flow Label}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0400h]h0x0400}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj"ubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hInner source porth]hInner source port}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj9ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h0x0800h]h0x0800}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjYubah}(h]h ]h"]h$]h&]uh1jhjVubj)}(hhh]j)}(hInner destination porth]hInner destination port}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjpubah}(h]h ]h"]h$]h&]uh1jhjVubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]colsKuh1jhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(h;Default: 0x0007 (source IP, destination IP and IP protocol)h]h;Default: 0x0007 (source IP, destination IP and IP protocol)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXfib_multipath_hash_seed - UNSIGNED INTEGER The seed value used when calculating hash for multipath routes. Applies to both IPv4 and IPv6 datapath. Only present for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled. When set to 0, the seed value used for multipath routing defaults to an internal random-generated one. The actual hashing algorithm is not specified -- there is no guarantee that a next hop distribution effected by a given seed will keep stable across kernel versions. Default: 0 (random) h](h)}(h*fib_multipath_hash_seed - UNSIGNED INTEGERh]h*fib_multipath_hash_seed - UNSIGNED INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubj )}(hhh](j)}(hThe seed value used when calculating hash for multipath routes. Applies to both IPv4 and IPv6 datapath. Only present for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.h]hThe seed value used when calculating hash for multipath routes. Applies to both IPv4 and IPv6 datapath. Only present for kernels built with CONFIG_IP_ROUTE_MULTIPATH enabled.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(hfWhen set to 0, the seed value used for multipath routing defaults to an internal random-generated one.h]hfWhen set to 0, the seed value used for multipath routing defaults to an internal random-generated one.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(hThe actual hashing algorithm is not specified -- there is no guarantee that a next hop distribution effected by a given seed will keep stable across kernel versions.h]hThe actual hashing algorithm is not specified -- there is no guarantee that a next hop distribution effected by a given seed will keep stable across kernel versions.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(hDefault: 0 (random)h]hDefault: 0 (random)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hfib_sync_mem - UNSIGNED INTEGER Amount of dirty memory from fib entries that can be backlogged before synchronize_rcu is forced. Default: 512kB Minimum: 64kB Maximum: 64MB h](h)}(hfib_sync_mem - UNSIGNED INTEGERh]hfib_sync_mem - UNSIGNED INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubj )}(hhh](j)}(h`Amount of dirty memory from fib entries that can be backlogged before synchronize_rcu is forced.h]h`Amount of dirty memory from fib entries that can be backlogged before synchronize_rcu is forced.}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj%ubj)}(h.Default: 512kB Minimum: 64kB Maximum: 64MBh]h.Default: 512kB Minimum: 64kB Maximum: 64MB}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj%ubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXTip_forward_update_priority - INTEGER Whether to update SKB priority from "TOS" field in IPv4 header after it is forwarded. The new SKB priority is mapped from TOS field value according to an rt_tos2priority table (see e.g. man tc-prio). Default: 1 (Update priority.) Possible values: - 0 - Do not update priority. - 1 - Update priority. h](h)}(h$ip_forward_update_priority - INTEGERh]h$ip_forward_update_priority - INTEGER}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjPubj )}(hhh](j)}(hWhether to update SKB priority from "TOS" field in IPv4 header after it is forwarded. The new SKB priority is mapped from TOS field value according to an rt_tos2priority table (see e.g. man tc-prio).h]hWhether to update SKB priority from “TOS” field in IPv4 header after it is forwarded. The new SKB priority is mapped from TOS field value according to an rt_tos2priority table (see e.g. man tc-prio).}(hjehhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjbubj)}(hDefault: 1 (Update priority.)h]hDefault: 1 (Update priority.)}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjbubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjbubj;)}(hhh](j@)}(h0 - Do not update priority.h]j)}(hjh]h0 - Do not update priority.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h1 - Update priority. h]j)}(h1 - Update priority.h]h1 - Update priority.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhKhjbubeh}(h]h ]h"]h$]h&]uh1j hjPubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hX\route/max_size - INTEGER Maximum number of routes allowed in the kernel. Increase this when using large numbers of interfaces and/or routes. From linux kernel 3.6 onwards, this is deprecated for ipv4 as route cache is no longer used. From linux kernel 6.3 onwards, this is deprecated for ipv6 as garbage collection manages cached route entries. h](h)}(hroute/max_size - INTEGERh]hroute/max_size - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubj )}(hhh](j)}(htMaximum number of routes allowed in the kernel. Increase this when using large numbers of interfaces and/or routes.h]htMaximum number of routes allowed in the kernel. Increase this when using large numbers of interfaces and/or routes.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(h\From linux kernel 3.6 onwards, this is deprecated for ipv4 as route cache is no longer used.h]h\From linux kernel 3.6 onwards, this is deprecated for ipv4 as route cache is no longer used.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubj)}(hnFrom linux kernel 6.3 onwards, this is deprecated for ipv6 as garbage collection manages cached route entries.h]hnFrom linux kernel 6.3 onwards, this is deprecated for ipv6 as garbage collection manages cached route entries.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hneigh/default/gc_thresh1 - INTEGER Minimum number of entries to keep. Garbage collector will not purge entries if there are fewer than this number. Default: 128 h](h)}(h"neigh/default/gc_thresh1 - INTEGERh]h"neigh/default/gc_thresh1 - INTEGER}(hj" hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubj )}(hhh](j)}(hqMinimum number of entries to keep. Garbage collector will not purge entries if there are fewer than this number.h]hqMinimum number of entries to keep. Garbage collector will not purge entries if there are fewer than this number.}(hj3 hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj0 ubj)}(h Default: 128h]h Default: 128}(hjA hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj0 ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hneigh/default/gc_thresh2 - INTEGER Threshold when garbage collector becomes more aggressive about purging entries. Entries older than 5 seconds will be cleared when over this number. Default: 512 h](h)}(h"neigh/default/gc_thresh2 - INTEGERh]h"neigh/default/gc_thresh2 - INTEGER}(hj_ hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj[ ubj )}(hhh](j)}(hThreshold when garbage collector becomes more aggressive about purging entries. Entries older than 5 seconds will be cleared when over this number.h]hThreshold when garbage collector becomes more aggressive about purging entries. Entries older than 5 seconds will be cleared when over this number.}(hjp hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjm ubj)}(h Default: 512h]h Default: 512}(hj~ hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhjm ubeh}(h]h ]h"]h$]h&]uh1j hj[ ubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hneigh/default/gc_thresh3 - INTEGER Maximum number of non-PERMANENT neighbor entries allowed. Increase this when using large numbers of interfaces and when communicating with large numbers of directly-connected peers. Default: 1024 h](h)}(h"neigh/default/gc_thresh3 - INTEGERh]h"neigh/default/gc_thresh3 - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubj )}(hhh](j)}(hMaximum number of non-PERMANENT neighbor entries allowed. Increase this when using large numbers of interfaces and when communicating with large numbers of directly-connected peers.h]hMaximum number of non-PERMANENT neighbor entries allowed. Increase this when using large numbers of interfaces and when communicating with large numbers of directly-connected peers.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubj)}(h Default: 1024h]h Default: 1024}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hneigh/default/gc_interval - INTEGER Specifies how often the garbage collector for neighbor entries should run. This value applies to the entire table, not individual entries. Unused since kernel v2.6.8. Default: 30 seconds h](h)}(h#neigh/default/gc_interval - INTEGERh]h#neigh/default/gc_interval - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubj )}(hhh](j)}(hSpecifies how often the garbage collector for neighbor entries should run. This value applies to the entire table, not individual entries. Unused since kernel v2.6.8.h]hSpecifies how often the garbage collector for neighbor entries should run. This value applies to the entire table, not individual entries. Unused since kernel v2.6.8.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubj)}(hDefault: 30 secondsh]hDefault: 30 seconds}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXneigh/default/gc_stale_time - INTEGER Determines how long a neighbor entry can remain unused before it is considered stale and eligible for garbage collection. Entries that have not been used for longer than this time will be removed by the garbage collector, unless they have active references, are marked as PERMANENT, or carry the NTF_EXT_LEARNED or NTF_EXT_VALIDATED flag. Stale entries are only removed by the periodic GC when there are at least gc_thresh1 neighbors in the table. Default: 60 seconds h](h)}(h%neigh/default/gc_stale_time - INTEGERh]h%neigh/default/gc_stale_time - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubj )}(hhh](j)}(hXDetermines how long a neighbor entry can remain unused before it is considered stale and eligible for garbage collection. Entries that have not been used for longer than this time will be removed by the garbage collector, unless they have active references, are marked as PERMANENT, or carry the NTF_EXT_LEARNED or NTF_EXT_VALIDATED flag. Stale entries are only removed by the periodic GC when there are at least gc_thresh1 neighbors in the table.h]hXDetermines how long a neighbor entry can remain unused before it is considered stale and eligible for garbage collection. Entries that have not been used for longer than this time will be removed by the garbage collector, unless they have active references, are marked as PERMANENT, or carry the NTF_EXT_LEARNED or NTF_EXT_VALIDATED flag. Stale entries are only removed by the periodic GC when there are at least gc_thresh1 neighbors in the table.}(hj' hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj$ ubj)}(hDefault: 60 secondsh]hDefault: 60 seconds}(hj5 hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhj$ ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhKhhhhubh)}(hXneigh/default/unres_qlen_bytes - INTEGER The maximum number of bytes which may be used by packets queued for each unresolved address by other network layers. (added in linux 3.3) Setting negative value is meaningless and will return error. Default: SK_WMEM_DEFAULT, (same as net.core.wmem_default). Exact value depends on architecture and kernel options, but should be enough to allow queuing 256 packets of medium size. h](h)}(h(neigh/default/unres_qlen_bytes - INTEGERh]h(neigh/default/unres_qlen_bytes - INTEGER}(hjS hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjO ubj )}(hhh](j)}(hThe maximum number of bytes which may be used by packets queued for each unresolved address by other network layers. (added in linux 3.3)h]hThe maximum number of bytes which may be used by packets queued for each unresolved address by other network layers. (added in linux 3.3)}(hjd hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhKhja ubj)}(hhj ubj )}(hhh](j)}(hXiipfrag_max_dist is a non-negative integer value which defines the maximum "disorder" which is allowed among fragments which share a common IP source address. Note that reordering of packets is not unusual, but if a large number of fragments arrive from a source IP address while a particular fragment queue remains incomplete, it probably indicates that one or more fragments belonging to that queue have been lost. When ipfrag_max_dist is positive, an additional check is done on fragments before they are added to a reassembly queue - if ipfrag_max_dist (or more) fragments have arrived from a particular IP address between additions to any IP fragment queue using that source address, it's presumed that one or more fragments in the queue are lost. The existing fragment queue will be dropped, and a new one started. An ipfrag_max_dist value of zero disables this check.h]hXoipfrag_max_dist is a non-negative integer value which defines the maximum “disorder” which is allowed among fragments which share a common IP source address. Note that reordering of packets is not unusual, but if a large number of fragments arrive from a source IP address while a particular fragment queue remains incomplete, it probably indicates that one or more fragments belonging to that queue have been lost. When ipfrag_max_dist is positive, an additional check is done on fragments before they are added to a reassembly queue - if ipfrag_max_dist (or more) fragments have arrived from a particular IP address between additions to any IP fragment queue using that source address, it’s presumed that one or more fragments in the queue are lost. The existing fragment queue will be dropped, and a new one started. An ipfrag_max_dist value of zero disables this check.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM*hj ubj)}(hXUsing a very small value, e.g. 1 or 2, for ipfrag_max_dist can result in unnecessarily dropping fragment queues when normal reordering of packets occurs, which could lead to poor application performance. Using a very large value, e.g. 50000, increases the likelihood of incorrectly reassembling IP fragments that originate from different IP datagrams, which could result in data corruption. Default: 64h]hXUsing a very small value, e.g. 1 or 2, for ipfrag_max_dist can result in unnecessarily dropping fragment queues when normal reordering of packets occurs, which could lead to poor application performance. Using a very large value, e.g. 50000, increases the likelihood of incorrectly reassembling IP fragments that originate from different IP datagrams, which could result in data corruption. Default: 64}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM8hj ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhM>hjd hhubh)}(hXbc_forwarding - INTEGER bc_forwarding enables the feature described in rfc1812#section-5.3.5.2 and rfc2644. It allows the router to forward directed broadcast. To enable this feature, the 'all' entry and the input interface entry should be set to 1. Default: 0 h](h)}(hbc_forwarding - INTEGERh]hbc_forwarding - INTEGER}(hj5 hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMEhj1 ubj )}(hhh]j)}(hbc_forwarding enables the feature described in rfc1812#section-5.3.5.2 and rfc2644. It allows the router to forward directed broadcast. To enable this feature, the 'all' entry and the input interface entry should be set to 1. Default: 0h]hbc_forwarding enables the feature described in rfc1812#section-5.3.5.2 and rfc2644. It allows the router to forward directed broadcast. To enable this feature, the ‘all’ entry and the input interface entry should be set to 1. Default: 0}(hjF hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMAhjC ubah}(h]h ]h"]h$]h&]uh1j hj1 ubeh}(h]h ]h"]h$]h&]uh1hhhhMEhjd hhubeh}(h]h ]h"]h$]h&]uh1hhhhhhhhNubeh}(h]proc-sys-net-ipv4-variablesah ]h"]/proc/sys/net/ipv4/* variablesah$]h&]uh1hhhhhhhhKubh)}(hhh](h)}(hINET peer storageh]hINET peer storage}(hjq hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjn hhhhhMHubh)}(hhh](h)}(hX&inet_peer_threshold - INTEGER The approximate size of the storage. Starting from this threshold entries will be thrown aggressively. This threshold also determines entries' time-to-live and time intervals between garbage collection passes. More entries, less time-to-live, less GC interval. h](h)}(hinet_peer_threshold - INTEGERh]hinet_peer_threshold - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMNhj ubj )}(hhh]j)}(hXThe approximate size of the storage. Starting from this threshold entries will be thrown aggressively. This threshold also determines entries' time-to-live and time intervals between garbage collection passes. More entries, less time-to-live, less GC interval.h]hX The approximate size of the storage. Starting from this threshold entries will be thrown aggressively. This threshold also determines entries’ time-to-live and time intervals between garbage collection passes. More entries, less time-to-live, less GC interval.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMKhj ubah}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhMNhj ubh)}(hinet_peer_minttl - INTEGER Minimum time-to-live of entries. Should be enough to cover fragment time-to-live on the reassembling side. This minimum time-to-live is guaranteed if the pool size is less than inet_peer_threshold. Measured in seconds. h](h)}(hinet_peer_minttl - INTEGERh]hinet_peer_minttl - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMThj ubj )}(hhh]j)}(hMinimum time-to-live of entries. Should be enough to cover fragment time-to-live on the reassembling side. This minimum time-to-live is guaranteed if the pool size is less than inet_peer_threshold. Measured in seconds.h]hMinimum time-to-live of entries. Should be enough to cover fragment time-to-live on the reassembling side. This minimum time-to-live is guaranteed if the pool size is less than inet_peer_threshold. Measured in seconds.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQhj ubah}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhMThj hhubh)}(hinet_peer_maxttl - INTEGER Maximum time-to-live of entries. Unused entries will expire after this period of time if there is no memory pressure on the pool (i.e. when the number of entries in the pool is very small). Measured in seconds. h](h)}(hinet_peer_maxttl - INTEGERh]hinet_peer_maxttl - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMZhj ubj )}(hhh]j)}(hMaximum time-to-live of entries. Unused entries will expire after this period of time if there is no memory pressure on the pool (i.e. when the number of entries in the pool is very small). Measured in seconds.h]hMaximum time-to-live of entries. Unused entries will expire after this period of time if there is no memory pressure on the pool (i.e. when the number of entries in the pool is very small). Measured in seconds.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMWhj ubah}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhMZhj hhubeh}(h]h ]h"]h$]h&]uh1hhjn hhhhhNubeh}(h]inet-peer-storageah ]h"]inet peer storageah$]h&]uh1hhhhhhhhMHubh)}(hhh](h)}(h TCP variablesh]h TCP variables}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhhhhhM]ubh)}(hhh](h)}(hsomaxconn - INTEGER Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 4096. (Was 128 before linux-5.4) See also tcp_max_syn_backlog for additional tuning for TCP sockets. h](h)}(hsomaxconn - INTEGERh]hsomaxconn - INTEGER}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMbhj1ubj )}(hhh]j)}(hLimit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 4096. (Was 128 before linux-5.4) See also tcp_max_syn_backlog for additional tuning for TCP sockets.h]hLimit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 4096. (Was 128 before linux-5.4) See also tcp_max_syn_backlog for additional tuning for TCP sockets.}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM`hjCubah}(h]h ]h"]h$]h&]uh1j hj1ubeh}(h]h ]h"]h$]h&]uh1hhhhMbhj.ubh)}(hXwtcp_abort_on_overflow - BOOLEAN If listening service is too slow to accept new connections, reset them. Default state is FALSE. It means that if overflow occurred due to a burst, connection will recover. Enable this option _only_ if you are really sure that listening daemon cannot be tuned to accept connections faster. Enabling this option can harm clients of your server. h](h)}(htcp_abort_on_overflow - BOOLEANh]htcp_abort_on_overflow - BOOLEAN}(hjdhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMjhj`ubj )}(hhh]j)}(hXVIf listening service is too slow to accept new connections, reset them. Default state is FALSE. It means that if overflow occurred due to a burst, connection will recover. Enable this option _only_ if you are really sure that listening daemon cannot be tuned to accept connections faster. Enabling this option can harm clients of your server.h]hXVIf listening service is too slow to accept new connections, reset them. Default state is FALSE. It means that if overflow occurred due to a burst, connection will recover. Enable this option _only_ if you are really sure that listening daemon cannot be tuned to accept connections faster. Enabling this option can harm clients of your server.}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMehjrubah}(h]h ]h"]h$]h&]uh1j hj`ubeh}(h]h ]h"]h$]h&]uh1hhhhMjhj.hhubh)}(htcp_adv_win_scale - INTEGER Obsolete since linux-6.6 Count buffering overhead as bytes/2^tcp_adv_win_scale (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale), if it is <= 0. Possible values are [-31, 31], inclusive. Default: 1 h](h)}(htcp_adv_win_scale - INTEGERh]htcp_adv_win_scale - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMthjubj )}(hhh](j)}(hObsolete since linux-6.6 Count buffering overhead as bytes/2^tcp_adv_win_scale (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale), if it is <= 0.h]hObsolete since linux-6.6 Count buffering overhead as bytes/2^tcp_adv_win_scale (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale), if it is <= 0.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMmhjubj)}(h)Possible values are [-31, 31], inclusive.h]h)Possible values are [-31, 31], inclusive.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhjubj)}(h Default: 1h]h Default: 1}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMthjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMthj.hhubh)}(hXtcp_allowed_congestion_control - STRING Show/set the congestion control choices available to non-privileged processes. The list is a subset of those listed in tcp_available_congestion_control. Default is "reno" and the default setting (tcp_congestion_control). h](h)}(h'tcp_allowed_congestion_control - STRINGh]h'tcp_allowed_congestion_control - STRING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM{hjubj )}(hhh](j)}(hShow/set the congestion control choices available to non-privileged processes. The list is a subset of those listed in tcp_available_congestion_control.h]hShow/set the congestion control choices available to non-privileged processes. The list is a subset of those listed in tcp_available_congestion_control.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMwhjubj)}(hCDefault is "reno" and the default setting (tcp_congestion_control).h]hGDefault is “reno” and the default setting (tcp_congestion_control).}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM{hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM{hj.hhubh)}(htcp_app_win - INTEGER Reserve max(window/2^tcp_app_win, mss) of window for application buffer. Value 0 is special, it means that nothing is reserved. Possible values are [0, 31], inclusive. Default: 31 h](h)}(htcp_app_win - INTEGERh]htcp_app_win - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hReserve max(window/2^tcp_app_win, mss) of window for application buffer. Value 0 is special, it means that nothing is reserved.h]hReserve max(window/2^tcp_app_win, mss) of window for application buffer. Value 0 is special, it means that nothing is reserved.}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM~hj)ubj)}(h'Possible values are [0, 31], inclusive.h]h'Possible values are [0, 31], inclusive.}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj)ubj)}(h Default: 31h]h Default: 31}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj)ubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_autocorking - BOOLEAN Enable TCP auto corking : When applications do consecutive small write()/sendmsg() system calls, we try to coalesce these small writes as much as possible, to lower total amount of sent packets. This is done if at least one prior packet for the flow is waiting in Qdisc queues or device transmit queue. Applications can still use TCP_CORK for optimal behavior when they know how/when to uncork their sockets. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_autocorking - BOOLEANh]htcp_autocorking - BOOLEAN}(hjfhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjbubj )}(hhh](j)}(hXEnable TCP auto corking : When applications do consecutive small write()/sendmsg() system calls, we try to coalesce these small writes as much as possible, to lower total amount of sent packets. This is done if at least one prior packet for the flow is waiting in Qdisc queues or device transmit queue. Applications can still use TCP_CORK for optimal behavior when they know how/when to uncork their sockets.h]hXEnable TCP auto corking : When applications do consecutive small write()/sendmsg() system calls, we try to coalesce these small writes as much as possible, to lower total amount of sent packets. This is done if at least one prior packet for the flow is waiting in Qdisc queues or device transmit queue. Applications can still use TCP_CORK for optimal behavior when they know how/when to uncork their sockets.}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjtubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjtubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjtubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjtubeh}(h]h ]h"]h$]h&]uh1j hjbubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_available_congestion_control - STRING Shows the available congestion control choices that are registered. More congestion control algorithms may be available as modules, but not loaded. h](h)}(h)tcp_available_congestion_control - STRINGh]h)tcp_available_congestion_control - STRING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh]j)}(hShows the available congestion control choices that are registered. More congestion control algorithms may be available as modules, but not loaded.h]hShows the available congestion control choices that are registered. More congestion control algorithms may be available as modules, but not loaded.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_base_mss - INTEGER The initial value of search_low to be used by the packetization layer Path MTU discovery (MTU probing). If MTU probing is enabled, this is the initial MSS used by the connection. h](h)}(htcp_base_mss - INTEGERh]htcp_base_mss - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh]j)}(hThe initial value of search_low to be used by the packetization layer Path MTU discovery (MTU probing). If MTU probing is enabled, this is the initial MSS used by the connection.h]hThe initial value of search_low to be used by the packetization layer Path MTU discovery (MTU probing). If MTU probing is enabled, this is the initial MSS used by the connection.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_mtu_probe_floor - INTEGER If MTU probing is enabled this caps the minimum MSS used for search_low for the connection. Default : 48 h](h)}(htcp_mtu_probe_floor - INTEGERh]htcp_mtu_probe_floor - INTEGER}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjCubj )}(hhh](j)}(h[If MTU probing is enabled this caps the minimum MSS used for search_low for the connection.h]h[If MTU probing is enabled this caps the minimum MSS used for search_low for the connection.}(hjXhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjUubj)}(h Default : 48h]h Default : 48}(hjfhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjUubeh}(h]h ]h"]h$]h&]uh1j hjCubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_min_snd_mss - INTEGER TCP SYN and SYNACK messages usually advertise an ADVMSS option, as described in RFC 1122 and RFC 6691. If this ADVMSS option is smaller than tcp_min_snd_mss, it is silently capped to tcp_min_snd_mss. Default : 48 (at least 8 bytes of payload per segment) h](h)}(htcp_min_snd_mss - INTEGERh]htcp_min_snd_mss - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hfTCP SYN and SYNACK messages usually advertise an ADVMSS option, as described in RFC 1122 and RFC 6691.h]hfTCP SYN and SYNACK messages usually advertise an ADVMSS option, as described in RFC 1122 and RFC 6691.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h`If this ADVMSS option is smaller than tcp_min_snd_mss, it is silently capped to tcp_min_snd_mss.h]h`If this ADVMSS option is smaller than tcp_min_snd_mss, it is silently capped to tcp_min_snd_mss.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h6Default : 48 (at least 8 bytes of payload per segment)h]h6Default : 48 (at least 8 bytes of payload per segment)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_congestion_control - STRING Set the congestion control algorithm to be used for new connections. The algorithm "reno" is always available, but additional choices may be available based on kernel configuration. Default is set as part of kernel configuration. For passive connections, the listener congestion control choice is inherited. [see setsockopt(listenfd, SOL_TCP, TCP_CONGESTION, "name" ...) ] h](h)}(htcp_congestion_control - STRINGh]htcp_congestion_control - STRING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hX3Set the congestion control algorithm to be used for new connections. The algorithm "reno" is always available, but additional choices may be available based on kernel configuration. Default is set as part of kernel configuration. For passive connections, the listener congestion control choice is inherited.h]hX7Set the congestion control algorithm to be used for new connections. The algorithm “reno” is always available, but additional choices may be available based on kernel configuration. Default is set as part of kernel configuration. For passive connections, the listener congestion control choice is inherited.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h@[see setsockopt(listenfd, SOL_TCP, TCP_CONGESTION, "name" ...) ]h]hD[see setsockopt(listenfd, SOL_TCP, TCP_CONGESTION, “name” ...) ]}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_dsack - BOOLEAN Allows TCP to send "duplicate" SACKs. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_dsack - BOOLEANh]htcp_dsack - BOOLEAN}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(h%Allows TCP to send "duplicate" SACKs.h]h)Allows TCP to send “duplicate” SACKs.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hPossible values:h]hPossible values:}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj>h]h 0 (disabled)}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubah}(h]h ]h"]h$]h&]uh1j?hj9ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjWhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubah}(h]h ]h"]h$]h&]uh1j?hj9ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_early_retrans - INTEGER Tail loss probe (TLP) converts RTOs occurring due to tail losses into fast recovery (RFC8985). Note that TLP requires RACK to function properly (see tcp_recovery below) Possible values: - 0 disables TLP - 3 or 4 enables TLP Default: 3 h](h)}(htcp_early_retrans - INTEGERh]htcp_early_retrans - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hTail loss probe (TLP) converts RTOs occurring due to tail losses into fast recovery (RFC8985). Note that TLP requires RACK to function properly (see tcp_recovery below)h]hTail loss probe (TLP) converts RTOs occurring due to tail losses into fast recovery (RFC8985). Note that TLP requires RACK to function properly (see tcp_recovery below)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj )}(h&- 0 disables TLP - 3 or 4 enables TLP h]j;)}(hhh](j@)}(h0 disables TLPh]j)}(hjh]h0 disables TLP}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h3 or 4 enables TLP h]j)}(h3 or 4 enables TLPh]h3 or 4 enables TLP}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjubah}(h]h ]h"]h$]h&]uh1j hhhMhjubj)}(h Default: 3h]h Default: 3}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_ecn - INTEGER Control use of Explicit Congestion Notification (ECN) by TCP. ECN is used only when both ends of the TCP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets. A host that supports ECN both sends ECN at the IP layer and feeds back ECN at the TCP layer. The highest variant of ECN feedback that both peers support is chosen by the ECN negotiation (Accurate ECN, ECN, or no ECN). The highest negotiated variant for incoming connection requests and the highest variant requested by outgoing connection attempts: ===== ==================== ==================== Value Incoming connections Outgoing connections ===== ==================== ==================== 0 No ECN No ECN 1 ECN ECN 2 ECN No ECN 3 AccECN AccECN 4 AccECN ECN 5 AccECN No ECN ===== ==================== ==================== Default: 2 h](h)}(htcp_ecn - INTEGERh]htcp_ecn - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hXControl use of Explicit Congestion Notification (ECN) by TCP. ECN is used only when both ends of the TCP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets. A host that supports ECN both sends ECN at the IP layer and feeds back ECN at the TCP layer. The highest variant of ECN feedback that both peers support is chosen by the ECN negotiation (Accurate ECN, ECN, or no ECN).h]hXControl use of Explicit Congestion Notification (ECN) by TCP. ECN is used only when both ends of the TCP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets. A host that supports ECN both sends ECN at the IP layer and feeds back ECN at the TCP layer. The highest variant of ECN feedback that both peers support is chosen by the ECN negotiation (Accurate ECN, ECN, or no ECN).}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj*ubj)}(hThe highest negotiated variant for incoming connection requests and the highest variant requested by outgoing connection attempts:h]hThe highest negotiated variant for incoming connection requests and the highest variant requested by outgoing connection attempts:}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj*ubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjLubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjLubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjLubhthead)}(hhh]j)}(hhh](j)}(hhh]j)}(hValueh]hValue}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjuubah}(h]h ]h"]h$]h&]uh1jhjrubj)}(hhh]j)}(hIncoming connectionsh]hIncoming connections}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjrubj)}(hhh]j)}(hOutgoing connectionsh]hOutgoing connections}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjrubeh}(h]h ]h"]h$]h&]uh1jhjoubah}(h]h ]h"]h$]h&]uh1jmhjLubj)}(hhh](j)}(hhh](j)}(hhh]j)}(h0h]h0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hNo ECNh]hNo ECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hNo ECNh]hNo ECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h1h]h1}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hECNh]hECN}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj1ubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hECNh]hECN}(hjKhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjHubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h2h]h2}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjhubah}(h]h ]h"]h$]h&]uh1jhjeubj)}(hhh]j)}(hECNh]hECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjeubj)}(hhh]j)}(hNo ECNh]hNo ECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjeubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h3h]h3}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hAccECNh]hAccECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hAccECNh]hAccECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h4h]h4}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hAccECNh]hAccECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(hECNh]hECN}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj2ubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h5h]h5}(hjUhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjRubah}(h]h ]h"]h$]h&]uh1jhjOubj)}(hhh]j)}(hAccECNh]hAccECN}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjiubah}(h]h ]h"]h$]h&]uh1jhjOubj)}(hhh]j)}(hNo ECNh]hNo ECN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjOubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjLubeh}(h]h ]h"]h$]h&]colsKuh1jhjIubah}(h]h ]h"]h$]h&]uh1jhj*ubj)}(h Default: 2h]h Default: 2}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj*ubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXmtcp_ecn_option - INTEGER Control Accurate ECN (AccECN) option sending when AccECN has been successfully negotiated during handshake. Send logic inhibits sending AccECN options regarless of this setting when no AccECN option has been seen for the reverse direction. Possible values are: = ============================================================ 0 Never send AccECN option. This also disables sending AccECN option in SYN/ACK during handshake. 1 Send AccECN option sparingly according to the minimum option rules outlined in draft-ietf-tcpm-accurate-ecn. 2 Send AccECN option on every packet whenever it fits into TCP option space except when AccECN fallback is triggered. 3 Send AccECN option on every packet whenever it fits into TCP option space even when AccECN fallback is triggered. = ============================================================ Default: 2 h](h)}(htcp_ecn_option - INTEGERh]htcp_ecn_option - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hControl Accurate ECN (AccECN) option sending when AccECN has been successfully negotiated during handshake. Send logic inhibits sending AccECN options regarless of this setting when no AccECN option has been seen for the reverse direction.h]hControl Accurate ECN (AccECN) option sending when AccECN has been successfully negotiated during handshake. Send logic inhibits sending AccECN options regarless of this setting when no AccECN option has been seen for the reverse direction.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hPossible values are:h]hPossible values are:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKhj:ubah}(h]h ]h"]h$]h&]uh1j hhhM@hj)ubj)}(hXVThis can help mitigate simple "ack loop" DoS attacks, wherein a buggy or malicious middlebox or man-in-the-middle can rewrite TCP header fields in manner that causes each endpoint to think that the other is sending invalid TCP segments, thus causing each side to send an unterminating stream of duplicate acknowledgments for invalid segments.h]hXZThis can help mitigate simple “ack loop” DoS attacks, wherein a buggy or malicious middlebox or man-in-the-middle can rewrite TCP header fields in manner that causes each endpoint to think that the other is sending invalid TCP segments, thus causing each side to send an unterminating stream of duplicate acknowledgments for invalid segments.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMDhj)ubj)}(hUsing 0 disables rate-limiting of dupacks in response to invalid segments; otherwise this value specifies the minimal space between sending such dupacks, in milliseconds.h]hUsing 0 disables rate-limiting of dupacks in response to invalid segments; otherwise this value specifies the minimal space between sending such dupacks, in milliseconds.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMKhj)ubj)}(hDefault: 500 (milliseconds).h]hDefault: 500 (milliseconds).}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMOhj)ubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMOhj.hhubh)}(httcp_keepalive_time - INTEGER How often TCP sends out keepalive messages when keepalive is enabled. Default: 2hours. h](h)}(htcp_keepalive_time - INTEGERh]htcp_keepalive_time - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMShjubj )}(hhh]j)}(hVHow often TCP sends out keepalive messages when keepalive is enabled. Default: 2hours.h]hVHow often TCP sends out keepalive messages when keepalive is enabled. Default: 2hours.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMRhjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMShj.hhubh)}(htcp_keepalive_probes - INTEGER How many keepalive probes TCP sends out, until it decides that the connection is broken. Default value: 9. h](h)}(htcp_keepalive_probes - INTEGERh]htcp_keepalive_probes - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMWhjubj )}(hhh]j)}(hjHow many keepalive probes TCP sends out, until it decides that the connection is broken. Default value: 9.h]hjHow many keepalive probes TCP sends out, until it decides that the connection is broken. Default value: 9.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMVhjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMWhj.hhubh)}(hXtcp_keepalive_intvl - INTEGER How frequently the probes are send out. Multiplied by tcp_keepalive_probes it is time to kill not responding connection, after probes started. Default value: 75sec i.e. connection will be aborted after ~11 minutes of retries. h](h)}(htcp_keepalive_intvl - INTEGERh]htcp_keepalive_intvl - INTEGER}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM]hj/ubj )}(hhh]j)}(hHow frequently the probes are send out. Multiplied by tcp_keepalive_probes it is time to kill not responding connection, after probes started. Default value: 75sec i.e. connection will be aborted after ~11 minutes of retries.h]hHow frequently the probes are send out. Multiplied by tcp_keepalive_probes it is time to kill not responding connection, after probes started. Default value: 75sec i.e. connection will be aborted after ~11 minutes of retries.}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMZhjAubah}(h]h ]h"]h$]h&]uh1j hj/ubeh}(h]h ]h"]h$]h&]uh1hhhhM]hj.hhubh)}(hXtcp_l3mdev_accept - BOOLEAN Enables child sockets to inherit the L3 master device index. Enabling this option allows a "global" listen socket to work across L3 master domains (e.g., VRFs) with connected sockets derived from the listen socket to be bound to the L3 domain in which the packets originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_l3mdev_accept - BOOLEANh]htcp_l3mdev_accept - BOOLEAN}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMlhj^ubj )}(hhh](j)}(hXZEnables child sockets to inherit the L3 master device index. Enabling this option allows a "global" listen socket to work across L3 master domains (e.g., VRFs) with connected sockets derived from the listen socket to be bound to the L3 domain in which the packets originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.h]hX^Enables child sockets to inherit the L3 master device index. Enabling this option allows a “global” listen socket to work across L3 master domains (e.g., VRFs) with connected sockets derived from the listen socket to be bound to the L3 domain in which the packets originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM`hjpubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMghjpubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMihjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMjhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMihjpubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMlhjpubeh}(h]h ]h"]h$]h&]uh1j hj^ubeh}(h]h ]h"]h$]h&]uh1hhhhMlhj.hhubh)}(hMtcp_low_latency - BOOLEAN This is a legacy option, it has no effect anymore. h](h)}(htcp_low_latency - BOOLEANh]htcp_low_latency - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMohjubj )}(hhh]j)}(h2This is a legacy option, it has no effect anymore.h]h2This is a legacy option, it has no effect anymore.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMohjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMohj.hhubh)}(hXStcp_max_orphans - INTEGER Maximal number of TCP sockets not attached to any user file handle, held by system. If this number is exceeded orphaned connections are reset immediately and warning is printed. This limit exists only to prevent simple DoS attacks, you _must_ not rely on this or lower the limit artificially, but rather increase it (probably, after increasing installed memory), if network conditions require more than default value, and tune network services to linger and kill such states more aggressively. Let me to remind again: each orphan eats up to ~64K of unswappable memory. h](h)}(htcp_max_orphans - INTEGERh]htcp_max_orphans - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM{hjubj )}(hhh]j)}(hX8Maximal number of TCP sockets not attached to any user file handle, held by system. If this number is exceeded orphaned connections are reset immediately and warning is printed. This limit exists only to prevent simple DoS attacks, you _must_ not rely on this or lower the limit artificially, but rather increase it (probably, after increasing installed memory), if network conditions require more than default value, and tune network services to linger and kill such states more aggressively. Let me to remind again: each orphan eats up to ~64K of unswappable memory.h]hX8Maximal number of TCP sockets not attached to any user file handle, held by system. If this number is exceeded orphaned connections are reset immediately and warning is printed. This limit exists only to prevent simple DoS attacks, you _must_ not rely on this or lower the limit artificially, but rather increase it (probably, after increasing installed memory), if network conditions require more than default value, and tune network services to linger and kill such states more aggressively. Let me to remind again: each orphan eats up to ~64K of unswappable memory.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhj"ubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM{hj.hhubh)}(hXtcp_max_syn_backlog - INTEGER Maximal number of remembered connection requests (SYN_RECV), which have not received an acknowledgment from connecting client. This is a per-listener limit. The minimal value is 128 for low memory machines, and it will increase in proportion to the memory of machine. If server suffers from overload, try increasing this number. Remember to also check /proc/sys/net/core/somaxconn A SYN_RECV request socket consumes about 304 bytes of memory. h](h)}(htcp_max_syn_backlog - INTEGERh]htcp_max_syn_backlog - INTEGER}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj?ubj )}(hhh](j)}(h~Maximal number of remembered connection requests (SYN_RECV), which have not received an acknowledgment from connecting client.h]h~Maximal number of remembered connection requests (SYN_RECV), which have not received an acknowledgment from connecting client.}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM~hjQubj)}(hThis is a per-listener limit.h]hThis is a per-listener limit.}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjQubj)}(hnThe minimal value is 128 for low memory machines, and it will increase in proportion to the memory of machine.h]hnThe minimal value is 128 for low memory machines, and it will increase in proportion to the memory of machine.}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjQubj)}(hhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubj)}(hThe default value is 8.h]hThe default value is 8.}(hjLhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubj)}(hIf your machine is a loaded WEB server, you should think about lowering this value, such sockets may consume significant resources. Cf. tcp_max_orphans.h]hIf your machine is a loaded WEB server, you should think about lowering this value, such sockets may consume significant resources. Cf. tcp_max_orphans.}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubeh}(h]h ]h"]h$]h&]uh1j hj)ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_recovery - INTEGER This value is a bitmap to enable various experimental loss recovery features. ========= ============================================================= RACK: 0x1 enables RACK loss detection, for fast detection of lost retransmissions and tail drops, and resilience to reordering. currently, setting this bit to 0 has no effect, since RACK is the only supported loss detection algorithm. RACK: 0x2 makes RACK's reordering window static (min_rtt/4). RACK: 0x4 disables RACK's DUPACK threshold heuristic ========= ============================================================= Default: 0x1 h](h)}(htcp_recovery - INTEGERh]htcp_recovery - INTEGER}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjtubj )}(hhh](j)}(hMThis value is a bitmap to enable various experimental loss recovery features.h]hMThis value is a bitmap to enable various experimental loss recovery features.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthK uh1jhjubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthK=uh1jhjubj)}(hhh](j)}(hhh](j)}(hhh]j)}(h RACK: 0x1h]h RACK: 0x1}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(henables RACK loss detection, for fast detection of lost retransmissions and tail drops, and resilience to reordering. currently, setting this bit to 0 has no effect, since RACK is the only supported loss detection algorithm.h]henables RACK loss detection, for fast detection of lost retransmissions and tail drops, and resilience to reordering. currently, setting this bit to 0 has no effect, since RACK is the only supported loss detection algorithm.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h RACK: 0x2h]h RACK: 0x2}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh]j)}(h2makes RACK's reordering window static (min_rtt/4).h]h4makes RACK’s reordering window static (min_rtt/4).}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubj)}(hhh](j)}(hhh]j)}(h RACK: 0x4h]h RACK: 0x4}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubah}(h]h ]h"]h$]h&]uh1jhj"ubj)}(hhh]j)}(h*disables RACK's DUPACK threshold heuristich]h,disables RACK’s DUPACK threshold heuristic}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubah}(h]h ]h"]h$]h&]uh1jhj"ubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]colsKuh1jhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(h Default: 0x1h]h Default: 0x1}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjtubeh}(h]h ]h"]h$]h&]uh1hhhhM hj.hhubh)}(hX|tcp_reflect_tos - BOOLEAN For listening sockets, reuse the DSCP value of the initial SYN message for outgoing packets. This allows to have both directions of a TCP stream to use the same DSCP value, assuming DSCP remains unchanged for the lifetime of the connection. This options affects both IPv4 and IPv6. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_reflect_tos - BOOLEANh]htcp_reflect_tos - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hFor listening sockets, reuse the DSCP value of the initial SYN message for outgoing packets. This allows to have both directions of a TCP stream to use the same DSCP value, assuming DSCP remains unchanged for the lifetime of the connection.h]hFor listening sockets, reuse the DSCP value of the initial SYN message for outgoing packets. This allows to have both directions of a TCP stream to use the same DSCP value, assuming DSCP remains unchanged for the lifetime of the connection.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(h(This options affects both IPv4 and IPv6.h]h(This options affects both IPv4 and IPv6.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_reordering - INTEGER Initial reordering level of packets in a TCP stream. TCP stack can then dynamically adjust flow reordering level between this initial value and tcp_max_reordering Default: 3 h](h)}(htcp_reordering - INTEGERh]htcp_reordering - INTEGER}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj ubj )}(hhh](j)}(hInitial reordering level of packets in a TCP stream. TCP stack can then dynamically adjust flow reordering level between this initial value and tcp_max_reorderingh]hInitial reordering level of packets in a TCP stream. TCP stack can then dynamically adjust flow reordering level between this initial value and tcp_max_reordering}(hj, hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj) ubj)}(h Default: 3h]h Default: 3}(hj: hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj) ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_max_reordering - INTEGER Maximal reordering level of packets in a TCP stream. 300 is a fairly conservative value, but you might increase it if paths are using per packet load balancing (like bonding rr mode) Default: 300 h](h)}(htcp_max_reordering - INTEGERh]htcp_max_reordering - INTEGER}(hjX hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM&hjT ubj )}(hhh](j)}(hMaximal reordering level of packets in a TCP stream. 300 is a fairly conservative value, but you might increase it if paths are using per packet load balancing (like bonding rr mode)h]hMaximal reordering level of packets in a TCP stream. 300 is a fairly conservative value, but you might increase it if paths are using per packet load balancing (like bonding rr mode)}(hji hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM"hjf ubj)}(h Default: 300h]h Default: 300}(hjw hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM&hjf ubeh}(h]h ]h"]h$]h&]uh1j hjT ubeh}(h]h ]h"]h$]h&]uh1hhhhM&hj.hhubh)}(htcp_retrans_collapse - BOOLEAN Bug-to-bug compatibility with some broken printers. On retransmit try to send bigger packets to work around bugs in certain TCP stacks. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_retrans_collapse - BOOLEANh]htcp_retrans_collapse - BOOLEAN}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM2hj ubj )}(hhh](j)}(hBug-to-bug compatibility with some broken printers. On retransmit try to send bigger packets to work around bugs in certain TCP stacks.h]hBug-to-bug compatibility with some broken printers. On retransmit try to send bigger packets to work around bugs in certain TCP stacks.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM)hj ubj)}(hPossible values:h]hPossible values:}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM-hj ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj h]h 0 (disabled)}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/hj ubah}(h]h ]h"]h$]h&]uh1j?hj ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM0hj ubah}(h]h ]h"]h$]h&]uh1j?hj ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM/hj ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM2hj ubeh}(h]h ]h"]h$]h&]uh1j hj ubeh}(h]h ]h"]h$]h&]uh1hhhhM2hj.hhubh)}(hX.tcp_retries1 - INTEGER This value influences the time, after which TCP decides, that something is wrong due to unacknowledged RTO retransmissions, and reports this suspicion to the network layer. See tcp_retries2 for more details. RFC 1122 recommends at least 3 retransmissions, which is the default. h](h)}(htcp_retries1 - INTEGERh]htcp_retries1 - INTEGER}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM;hj!ubj )}(hhh](j)}(hThis value influences the time, after which TCP decides, that something is wrong due to unacknowledged RTO retransmissions, and reports this suspicion to the network layer. See tcp_retries2 for more details.h]hThis value influences the time, after which TCP decides, that something is wrong due to unacknowledged RTO retransmissions, and reports this suspicion to the network layer. See tcp_retries2 for more details.}(hj)!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM5hj&!ubj)}(hERFC 1122 recommends at least 3 retransmissions, which is the default.h]hERFC 1122 recommends at least 3 retransmissions, which is the default.}(hj7!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM:hj&!ubeh}(h]h ]h"]h$]h&]uh1j hj!ubeh}(h]h ]h"]h$]h&]uh1hhhhM;hj.hhubh)}(hXtcp_retries2 - INTEGER This value influences the timeout of an alive TCP connection, when RTO retransmissions remain unacknowledged. Given a value of N, a hypothetical TCP connection following exponential backoff with an initial RTO of TCP_RTO_MIN would retransmit N times before killing the connection at the (N+1)th RTO. The default value of 15 yields a hypothetical timeout of 924.6 seconds and is a lower bound for the effective timeout. TCP will effectively time out at the first RTO which exceeds the hypothetical timeout. If tcp_rto_max_ms is decreased, it is recommended to also change tcp_retries2. RFC 1122 recommends at least 100 seconds for the timeout, which corresponds to a value of at least 8. h](h)}(htcp_retries2 - INTEGERh]htcp_retries2 - INTEGER}(hjU!hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMLhjQ!ubj )}(hhh](j)}(hX+This value influences the timeout of an alive TCP connection, when RTO retransmissions remain unacknowledged. Given a value of N, a hypothetical TCP connection following exponential backoff with an initial RTO of TCP_RTO_MIN would retransmit N times before killing the connection at the (N+1)th RTO.h]hX+This value influences the timeout of an alive TCP connection, when RTO retransmissions remain unacknowledged. Given a value of N, a hypothetical TCP connection following exponential backoff with an initial RTO of TCP_RTO_MIN would retransmit N times before killing the connection at the (N+1)th RTO.}(hjf!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM>hjc!ubj)}(hXThe default value of 15 yields a hypothetical timeout of 924.6 seconds and is a lower bound for the effective timeout. TCP will effectively time out at the first RTO which exceeds the hypothetical timeout. If tcp_rto_max_ms is decreased, it is recommended to also change tcp_retries2.h]hXThe default value of 15 yields a hypothetical timeout of 924.6 seconds and is a lower bound for the effective timeout. TCP will effectively time out at the first RTO which exceeds the hypothetical timeout. If tcp_rto_max_ms is decreased, it is recommended to also change tcp_retries2.}(hjt!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMDhjc!ubj)}(heRFC 1122 recommends at least 100 seconds for the timeout, which corresponds to a value of at least 8.h]heRFC 1122 recommends at least 100 seconds for the timeout, which corresponds to a value of at least 8.}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMKhjc!ubeh}(h]h ]h"]h$]h&]uh1j hjQ!ubeh}(h]h ]h"]h$]h&]uh1hhhhMLhj.hhubh)}(htcp_rfc1337 - BOOLEAN If enabled, the TCP stack behaves conforming to RFC1337. If unset, we are not conforming to RFC, but prevent TCP TIME_WAIT assassination. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_rfc1337 - BOOLEANh]htcp_rfc1337 - BOOLEAN}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMXhj!ubj )}(hhh](j)}(hIf enabled, the TCP stack behaves conforming to RFC1337. If unset, we are not conforming to RFC, but prevent TCP TIME_WAIT assassination.h]hIf enabled, the TCP stack behaves conforming to RFC1337. If unset, we are not conforming to RFC, but prevent TCP TIME_WAIT assassination.}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMOhj!ubj)}(hPossible values:h]hPossible values:}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMShj!ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj!h]h 0 (disabled)}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMUhj!ubah}(h]h ]h"]h$]h&]uh1j?hj!ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj!hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMVhj!ubah}(h]h ]h"]h$]h&]uh1j?hj!ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMUhj!ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMXhj!ubeh}(h]h ]h"]h$]h&]uh1j hj!ubeh}(h]h ]h"]h$]h&]uh1hhhhMXhj.hhubh)}(hXtcp_rmem - vector of 3 INTEGERs: min, default, max min: Minimal size of receive buffer used by TCP sockets. It is guaranteed to each TCP socket, even under moderate memory pressure. Default: 4K default: initial size of receive buffer used by TCP sockets. This value overrides net.core.rmem_default used by other protocols. Default: 131072 bytes. This value results in initial window of 65535. max: maximal size of receive buffer allowed for automatically selected receiver buffers for TCP socket. Calling setsockopt() with SO_RCVBUF disables automatic tuning of that socket's receive buffer size, in which case this value is ignored. Default: between 131072 and 32MB, depending on RAM size. h](h)}(h2tcp_rmem - vector of 3 INTEGERs: min, default, maxh]h2tcp_rmem - vector of 3 INTEGERs: min, default, max}(hj#"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMkhj"ubj )}(hhh](j)}(hmin: Minimal size of receive buffer used by TCP sockets. It is guaranteed to each TCP socket, even under moderate memory pressure.h]hmin: Minimal size of receive buffer used by TCP sockets. It is guaranteed to each TCP socket, even under moderate memory pressure.}(hj4"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM[hj1"ubj)}(h Default: 4Kh]h Default: 4K}(hjB"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM_hj1"ubj)}(hdefault: initial size of receive buffer used by TCP sockets. This value overrides net.core.rmem_default used by other protocols. Default: 131072 bytes. This value results in initial window of 65535.h]hdefault: initial size of receive buffer used by TCP sockets. This value overrides net.core.rmem_default used by other protocols. Default: 131072 bytes. This value results in initial window of 65535.}(hjP"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMahj1"ubj)}(hX)max: maximal size of receive buffer allowed for automatically selected receiver buffers for TCP socket. Calling setsockopt() with SO_RCVBUF disables automatic tuning of that socket's receive buffer size, in which case this value is ignored. Default: between 131072 and 32MB, depending on RAM size.h]hX+max: maximal size of receive buffer allowed for automatically selected receiver buffers for TCP socket. Calling setsockopt() with SO_RCVBUF disables automatic tuning of that socket’s receive buffer size, in which case this value is ignored. Default: between 131072 and 32MB, depending on RAM size.}(hj^"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMfhj1"ubeh}(h]h ]h"]h$]h&]uh1j hj"ubeh}(h]h ]h"]h$]h&]uh1hhhhMkhj.hhubh)}(htcp_sack - BOOLEAN Enable select acknowledgments (SACKS). Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_sack - BOOLEANh]htcp_sack - BOOLEAN}(hj|"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMuhjx"ubj )}(hhh](j)}(h&Enable select acknowledgments (SACKS).h]h&Enable select acknowledgments (SACKS).}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMnhj"ubj)}(hPossible values:h]hPossible values:}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMphj"ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj"h]h 0 (disabled)}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhj"ubah}(h]h ]h"]h$]h&]uh1j?hj"ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMshj"ubah}(h]h ]h"]h$]h&]uh1j?hj"ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMrhj"ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMuhj"ubeh}(h]h ]h"]h$]h&]uh1j hjx"ubeh}(h]h ]h"]h$]h&]uh1hhhhMuhj.hhubh)}(htcp_comp_sack_rtt_percent - INTEGER Percentage of SRTT used for the compressed SACK feature. See tcp_comp_sack_nr, tcp_comp_sack_delay_ns, tcp_comp_sack_slack_ns. Possible values : 1 - 1000 Default : 33 % h](h)}(h#tcp_comp_sack_rtt_percent - INTEGERh]h#tcp_comp_sack_rtt_percent - INTEGER}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM}hj"ubj )}(hhh](j)}(h~Percentage of SRTT used for the compressed SACK feature. See tcp_comp_sack_nr, tcp_comp_sack_delay_ns, tcp_comp_sack_slack_ns.h]h~Percentage of SRTT used for the compressed SACK feature. See tcp_comp_sack_nr, tcp_comp_sack_delay_ns, tcp_comp_sack_slack_ns.}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMxhj #ubj)}(hPossible values : 1 - 1000h]hPossible values : 1 - 1000}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM{hj #ubj)}(hDefault : 33 %h]hDefault : 33 %}(hj,#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM}hj #ubeh}(h]h ]h"]h$]h&]uh1j hj"ubeh}(h]h ]h"]h$]h&]uh1hhhhM}hj.hhubh)}(hXtcp_comp_sack_delay_ns - LONG INTEGER TCP tries to reduce number of SACK sent, using a timer based on tcp_comp_sack_rtt_percent of SRTT, capped by this sysctl in nano seconds. The default is 1ms, based on TSO autosizing period. Default : 1,000,000 ns (1 ms) h](h)}(h%tcp_comp_sack_delay_ns - LONG INTEGERh]h%tcp_comp_sack_delay_ns - LONG INTEGER}(hjJ#hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjF#ubj )}(hhh](j)}(hTCP tries to reduce number of SACK sent, using a timer based on tcp_comp_sack_rtt_percent of SRTT, capped by this sysctl in nano seconds. The default is 1ms, based on TSO autosizing period.h]hTCP tries to reduce number of SACK sent, using a timer based on tcp_comp_sack_rtt_percent of SRTT, capped by this sysctl in nano seconds. The default is 1ms, based on TSO autosizing period.}(hj[#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjX#ubj)}(hDefault : 1,000,000 ns (1 ms)h]hDefault : 1,000,000 ns (1 ms)}(hji#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjX#ubeh}(h]h ]h"]h$]h&]uh1j hjF#ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hX;tcp_comp_sack_slack_ns - LONG INTEGER This sysctl control the slack used when arming the timer used by SACK compression. This gives extra time for small RTT flows, and reduces system overhead by allowing opportunistic reduction of timer interrupts. Too big values might reduce goodput. Default : 10,000 ns (10 us) h](h)}(h%tcp_comp_sack_slack_ns - LONG INTEGERh]h%tcp_comp_sack_slack_ns - LONG INTEGER}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj#ubj )}(hhh](j)}(hThis sysctl control the slack used when arming the timer used by SACK compression. This gives extra time for small RTT flows, and reduces system overhead by allowing opportunistic reduction of timer interrupts. Too big values might reduce goodput.h]hThis sysctl control the slack used when arming the timer used by SACK compression. This gives extra time for small RTT flows, and reduces system overhead by allowing opportunistic reduction of timer interrupts. Too big values might reduce goodput.}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj#ubj)}(hDefault : 10,000 ns (10 us)h]hDefault : 10,000 ns (10 us)}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj#ubeh}(h]h ]h"]h$]h&]uh1j hj#ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hwtcp_comp_sack_nr - INTEGER Max number of SACK that can be compressed. Using 0 disables SACK compression. Default : 44 h](h)}(htcp_comp_sack_nr - INTEGERh]htcp_comp_sack_nr - INTEGER}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj#ubj )}(hhh](j)}(hMMax number of SACK that can be compressed. Using 0 disables SACK compression.h]hMMax number of SACK that can be compressed. Using 0 disables SACK compression.}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj#ubj)}(h Default : 44h]h Default : 44}(hj#hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj#ubeh}(h]h ]h"]h$]h&]uh1j hj#ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_backlog_ack_defer - BOOLEAN If enabled, user thread processing socket backlog tries sending one ACK for the whole queue. This helps to avoid potential long latencies at end of a TCP socket syscall. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_backlog_ack_defer - BOOLEANh]htcp_backlog_ack_defer - BOOLEAN}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj#ubj )}(hhh](j)}(hIf enabled, user thread processing socket backlog tries sending one ACK for the whole queue. This helps to avoid potential long latencies at end of a TCP socket syscall.h]hIf enabled, user thread processing socket backlog tries sending one ACK for the whole queue. This helps to avoid potential long latencies at end of a TCP socket syscall.}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubj)}(hPossible values:h]hPossible values:}(hj $hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj3$h]h 0 (disabled)}(hj5$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj1$ubah}(h]h ]h"]h$]h&]uh1j?hj.$ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjL$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjH$ubah}(h]h ]h"]h$]h&]uh1j?hj.$ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj$ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjf$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubeh}(h]h ]h"]h$]h&]uh1j hj#ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXDtcp_slow_start_after_idle - BOOLEAN If enabled, provide RFC2861 behavior and time out the congestion window after an idle period. An idle period is defined at the current RTO. If unset, the congestion window will not be timed out after an idle period. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(h#tcp_slow_start_after_idle - BOOLEANh]h#tcp_slow_start_after_idle - BOOLEAN}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj$ubj )}(hhh](j)}(hIf enabled, provide RFC2861 behavior and time out the congestion window after an idle period. An idle period is defined at the current RTO. If unset, the congestion window will not be timed out after an idle period.h]hIf enabled, provide RFC2861 behavior and time out the congestion window after an idle period. An idle period is defined at the current RTO. If unset, the congestion window will not be timed out after an idle period.}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubj)}(hPossible values:h]hPossible values:}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj$h]h 0 (disabled)}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubah}(h]h ]h"]h$]h&]uh1j?hj$ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubah}(h]h ]h"]h$]h&]uh1j?hj$ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj$ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$ubeh}(h]h ]h"]h$]h&]uh1j hj$ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_stdurg - BOOLEAN Use the Host requirements interpretation of the TCP urgent pointer field. Most hosts use the older BSD interpretation, so if enabled, Linux might not communicate correctly with them. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_stdurg - BOOLEANh]htcp_stdurg - BOOLEAN}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj%ubj )}(hhh](j)}(hUse the Host requirements interpretation of the TCP urgent pointer field. Most hosts use the older BSD interpretation, so if enabled, Linux might not communicate correctly with them.h]hUse the Host requirements interpretation of the TCP urgent pointer field. Most hosts use the older BSD interpretation, so if enabled, Linux might not communicate correctly with them.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubj)}(hPossible values:h]hPossible values:}(hj&%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj9%h]h 0 (disabled)}(hj;%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj7%ubah}(h]h ]h"]h$]h&]uh1j?hj4%ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjR%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjN%ubah}(h]h ]h"]h$]h&]uh1j?hj4%ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj%ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjl%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubeh}(h]h ]h"]h$]h&]uh1j hj%ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hX_tcp_synack_retries - INTEGER Number of times SYNACKs for a passive TCP connection attempt will be retransmitted. Should not be higher than 255. Default value is 5, which corresponds to 31seconds till the last retransmission with the current initial RTO of 1second. With this the final timeout for a passive TCP connection will happen after 63seconds. h](h)}(htcp_synack_retries - INTEGERh]htcp_synack_retries - INTEGER}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj%ubj )}(hhh]j)}(hXANumber of times SYNACKs for a passive TCP connection attempt will be retransmitted. Should not be higher than 255. Default value is 5, which corresponds to 31seconds till the last retransmission with the current initial RTO of 1second. With this the final timeout for a passive TCP connection will happen after 63seconds.h]hXANumber of times SYNACKs for a passive TCP connection attempt will be retransmitted. Should not be higher than 255. Default value is 5, which corresponds to 31seconds till the last retransmission with the current initial RTO of 1second. With this the final timeout for a passive TCP connection will happen after 63seconds.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubah}(h]h ]h"]h$]h&]uh1j hj%ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXStcp_syncookies - INTEGER Only valid when the kernel was compiled with CONFIG_SYN_COOKIES Send out syncookies when the syn backlog queue of a socket overflows. This is to prevent against the common 'SYN flood attack' Default: 1 Note, that syncookies is fallback facility. It MUST NOT be used to help highly loaded servers to stand against legal connection rate. If you see SYN flood warnings in your logs, but investigation shows that they occur because of overload with legal connections, you should tune another parameters until this warning disappear. See: tcp_max_syn_backlog, tcp_synack_retries, tcp_abort_on_overflow. syncookies seriously violate TCP protocol, do not allow to use TCP extensions, can result in serious degradation of some services (f.e. SMTP relaying), visible not by you, but your clients and relays, contacting you. While you see SYN flood warnings in logs not being really flooded, your server is seriously misconfigured. If you want to test which effects syncookies have to your network connections you can set this knob to 2 to enable unconditionally generation of syncookies. h](h)}(htcp_syncookies - INTEGERh]htcp_syncookies - INTEGER}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj%ubj )}(hhh](j)}(hOnly valid when the kernel was compiled with CONFIG_SYN_COOKIES Send out syncookies when the syn backlog queue of a socket overflows. This is to prevent against the common 'SYN flood attack' Default: 1h]hOnly valid when the kernel was compiled with CONFIG_SYN_COOKIES Send out syncookies when the syn backlog queue of a socket overflows. This is to prevent against the common ‘SYN flood attack’ Default: 1}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubj)}(hXNote, that syncookies is fallback facility. It MUST NOT be used to help highly loaded servers to stand against legal connection rate. If you see SYN flood warnings in your logs, but investigation shows that they occur because of overload with legal connections, you should tune another parameters until this warning disappear. See: tcp_max_syn_backlog, tcp_synack_retries, tcp_abort_on_overflow.h]hXNote, that syncookies is fallback facility. It MUST NOT be used to help highly loaded servers to stand against legal connection rate. If you see SYN flood warnings in your logs, but investigation shows that they occur because of overload with legal connections, you should tune another parameters until this warning disappear. See: tcp_max_syn_backlog, tcp_synack_retries, tcp_abort_on_overflow.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubj)}(hXCsyncookies seriously violate TCP protocol, do not allow to use TCP extensions, can result in serious degradation of some services (f.e. SMTP relaying), visible not by you, but your clients and relays, contacting you. While you see SYN flood warnings in logs not being really flooded, your server is seriously misconfigured.h]hXCsyncookies seriously violate TCP protocol, do not allow to use TCP extensions, can result in serious degradation of some services (f.e. SMTP relaying), visible not by you, but your clients and relays, contacting you. While you see SYN flood warnings in logs not being really flooded, your server is seriously misconfigured.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubj)}(hIf you want to test which effects syncookies have to your network connections you can set this knob to 2 to enable unconditionally generation of syncookies.h]hIf you want to test which effects syncookies have to your network connections you can set this knob to 2 to enable unconditionally generation of syncookies.}(hj%hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%ubeh}(h]h ]h"]h$]h&]uh1j hj%ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_migrate_req - BOOLEAN The incoming connection is tied to a specific listening socket when the initial SYN packet is received during the three-way handshake. When a listener is closed, in-flight request sockets during the handshake and established sockets in the accept queue are aborted. If the listener has SO_REUSEPORT enabled, other listeners on the same port should have been able to accept such connections. This option makes it possible to migrate such child sockets to another listener after close() or shutdown(). The BPF_SK_REUSEPORT_SELECT_OR_MIGRATE type of eBPF program should usually be used to define the policy to pick an alive listener. Otherwise, the kernel will randomly pick an alive listener only if this option is enabled. Note that migration between listeners with different settings may crash applications. Let's say migration happens from listener A to B, and only B has TCP_SAVE_SYN enabled. B cannot read SYN data from the requests migrated from A. To avoid such a situation, cancel migration by returning SK_DROP in the type of eBPF program, or disable this option. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_migrate_req - BOOLEANh]htcp_migrate_req - BOOLEAN}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj&ubj )}(hhh](j)}(hX The incoming connection is tied to a specific listening socket when the initial SYN packet is received during the three-way handshake. When a listener is closed, in-flight request sockets during the handshake and established sockets in the accept queue are aborted.h]hX The incoming connection is tied to a specific listening socket when the initial SYN packet is received during the three-way handshake. When a listener is closed, in-flight request sockets during the handshake and established sockets in the accept queue are aborted.}(hj#&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubj)}(hIf the listener has SO_REUSEPORT enabled, other listeners on the same port should have been able to accept such connections. This option makes it possible to migrate such child sockets to another listener after close() or shutdown().h]hIf the listener has SO_REUSEPORT enabled, other listeners on the same port should have been able to accept such connections. This option makes it possible to migrate such child sockets to another listener after close() or shutdown().}(hj1&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubj)}(hThe BPF_SK_REUSEPORT_SELECT_OR_MIGRATE type of eBPF program should usually be used to define the policy to pick an alive listener. Otherwise, the kernel will randomly pick an alive listener only if this option is enabled.h]hThe BPF_SK_REUSEPORT_SELECT_OR_MIGRATE type of eBPF program should usually be used to define the policy to pick an alive listener. Otherwise, the kernel will randomly pick an alive listener only if this option is enabled.}(hj?&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubj)}(hX\Note that migration between listeners with different settings may crash applications. Let's say migration happens from listener A to B, and only B has TCP_SAVE_SYN enabled. B cannot read SYN data from the requests migrated from A. To avoid such a situation, cancel migration by returning SK_DROP in the type of eBPF program, or disable this option.h]hX^Note that migration between listeners with different settings may crash applications. Let’s say migration happens from listener A to B, and only B has TCP_SAVE_SYN enabled. B cannot read SYN data from the requests migrated from A. To avoid such a situation, cancel migration by returning SK_DROP in the type of eBPF program, or disable this option.}(hjM&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubj)}(hPossible values:h]hPossible values:}(hj[&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjn&h]h 0 (disabled)}(hjp&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjl&ubah}(h]h ]h"]h$]h&]uh1j?hji&ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubah}(h]h ]h"]h$]h&]uh1j?hji&ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj &ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj &ubeh}(h]h ]h"]h$]h&]uh1j hj&ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_fastopen - INTEGER Enable TCP Fast Open (RFC7413) to send and accept data in the opening SYN packet. The client support is enabled by flag 0x1 (on by default). The client then must use sendmsg() or sendto() with the MSG_FASTOPEN flag, rather than connect() to send data in SYN. The server support is enabled by flag 0x2 (off by default). Then either enable for all listeners with another flag (0x400) or enable individual listeners via TCP_FASTOPEN socket option with the option value being the length of the syn-data backlog. The values (bitmap) are ===== ======== ====================================================== 0x1 (client) enables sending data in the opening SYN on the client. 0x2 (server) enables the server support, i.e., allowing data in a SYN packet to be accepted and passed to the application before 3-way handshake finishes. 0x4 (client) send data in the opening SYN regardless of cookie availability and without a cookie option. 0x200 (server) accept data-in-SYN w/o any cookie option present. 0x400 (server) enable all listeners to support Fast Open by default without explicit TCP_FASTOPEN socket option. ===== ======== ====================================================== Default: 0x1 Note that additional client or server features are only effective if the basic support (0x1 and 0x2) are enabled respectively. h](h)}(htcp_fastopen - INTEGERh]htcp_fastopen - INTEGER}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj&ubj )}(hhh](j)}(hQEnable TCP Fast Open (RFC7413) to send and accept data in the opening SYN packet.h]hQEnable TCP Fast Open (RFC7413) to send and accept data in the opening SYN packet.}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubj)}(hThe client support is enabled by flag 0x1 (on by default). The client then must use sendmsg() or sendto() with the MSG_FASTOPEN flag, rather than connect() to send data in SYN.h]hThe client support is enabled by flag 0x1 (on by default). The client then must use sendmsg() or sendto() with the MSG_FASTOPEN flag, rather than connect() to send data in SYN.}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubj)}(hThe server support is enabled by flag 0x2 (off by default). Then either enable for all listeners with another flag (0x400) or enable individual listeners via TCP_FASTOPEN socket option with the option value being the length of the syn-data backlog.h]hThe server support is enabled by flag 0x2 (off by default). Then either enable for all listeners with another flag (0x400) or enable individual listeners via TCP_FASTOPEN socket option with the option value being the length of the syn-data backlog.}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubj)}(hThe values (bitmap) areh]hThe values (bitmap) are}(hj&hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhj 'ubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhj 'ubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthK6uh1jhj 'ubj)}(hhh](j)}(hhh](j)}(hhh]j)}(h0x1h]h0x1}(hj5'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj2'ubah}(h]h ]h"]h$]h&]uh1jhj/'ubj)}(hhh]j)}(h(client)h]h(client)}(hjL'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjI'ubah}(h]h ]h"]h$]h&]uh1jhj/'ubj)}(hhh]j)}(h6enables sending data in the opening SYN on the client.h]h6enables sending data in the opening SYN on the client.}(hjc'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`'ubah}(h]h ]h"]h$]h&]uh1jhj/'ubeh}(h]h ]h"]h$]h&]uh1jhj,'ubj)}(hhh](j)}(hhh]j)}(h0x2h]h0x2}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj}'ubj)}(hhh]j)}(h(server)h]h(server)}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj}'ubj)}(hhh]j)}(henables the server support, i.e., allowing data in a SYN packet to be accepted and passed to the application before 3-way handshake finishes.h]henables the server support, i.e., allowing data in a SYN packet to be accepted and passed to the application before 3-way handshake finishes.}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj}'ubeh}(h]h ]h"]h$]h&]uh1jhj,'ubj)}(hhh](j)}(hhh]j)}(h0x4h]h0x4}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj'ubj)}(hhh]j)}(h(client)h]h(client)}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj'ubj)}(hhh]j)}(h[send data in the opening SYN regardless of cookie availability and without a cookie option.h]h[send data in the opening SYN regardless of cookie availability and without a cookie option.}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj'ubah}(h]h ]h"]h$]h&]uh1jhj'ubeh}(h]h ]h"]h$]h&]uh1jhj,'ubj)}(hhh](j)}(hhh]j)}(h0x200h]h0x200}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj(ubah}(h]h ]h"]h$]h&]uh1jhj(ubj)}(hhh]j)}(h(server)h]h(server)}(hj6(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3(ubah}(h]h ]h"]h$]h&]uh1jhj(ubj)}(hhh]j)}(h1accept data-in-SYN w/o any cookie option present.h]h1accept data-in-SYN w/o any cookie option present.}(hjM(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjJ(ubah}(h]h ]h"]h$]h&]uh1jhj(ubeh}(h]h ]h"]h$]h&]uh1jhj,'ubj)}(hhh](j)}(hhh]j)}(h0x400h]h0x400}(hjm(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjj(ubah}(h]h ]h"]h$]h&]uh1jhjg(ubj)}(hhh]j)}(h(server)h]h(server)}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj(ubah}(h]h ]h"]h$]h&]uh1jhjg(ubj)}(hhh]j)}(haenable all listeners to support Fast Open by default without explicit TCP_FASTOPEN socket option.h]haenable all listeners to support Fast Open by default without explicit TCP_FASTOPEN socket option.}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj(ubah}(h]h ]h"]h$]h&]uh1jhjg(ubeh}(h]h ]h"]h$]h&]uh1jhj,'ubeh}(h]h ]h"]h$]h&]uh1jhj 'ubeh}(h]h ]h"]h$]h&]colsKuh1jhj'ubah}(h]h ]h"]h$]h&]uh1jhj&ubj)}(h Default: 0x1h]h Default: 0x1}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubj)}(h~Note that additional client or server features are only effective if the basic support (0x1 and 0x2) are enabled respectively.h]h~Note that additional client or server features are only effective if the basic support (0x1 and 0x2) are enabled respectively.}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&ubeh}(h]h ]h"]h$]h&]uh1j hj&ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_fastopen_blackhole_timeout_sec - INTEGER Initial time period in second to disable Fastopen on active TCP sockets when a TFO firewall blackhole issue happens. This time period will grow exponentially when more blackhole issues get detected right after Fastopen is re-enabled and will reset to initial value when the blackhole issue goes away. 0 to disable the blackhole detection. By default, it is set to 0 (feature is disabled). h](h)}(h,tcp_fastopen_blackhole_timeout_sec - INTEGERh]h,tcp_fastopen_blackhole_timeout_sec - INTEGER}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM!hj(ubj )}(hhh](j)}(hXRInitial time period in second to disable Fastopen on active TCP sockets when a TFO firewall blackhole issue happens. This time period will grow exponentially when more blackhole issues get detected right after Fastopen is re-enabled and will reset to initial value when the blackhole issue goes away. 0 to disable the blackhole detection.h]hXRInitial time period in second to disable Fastopen on active TCP sockets when a TFO firewall blackhole issue happens. This time period will grow exponentially when more blackhole issues get detected right after Fastopen is re-enabled and will reset to initial value when the blackhole issue goes away. 0 to disable the blackhole detection.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj)ubj)}(h1By default, it is set to 0 (feature is disabled).h]h1By default, it is set to 0 (feature is disabled).}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM!hj)ubeh}(h]h ]h"]h$]h&]uh1j hj(ubeh}(h]h ]h"]h$]h&]uh1hhhhM!hj.hhubh)}(hXBtcp_fastopen_key - list of comma separated 32-digit hexadecimal INTEGERs The list consists of a primary key and an optional backup key. The primary key is used for both creating and validating cookies, while the optional backup key is only used for validating cookies. The purpose of the backup key is to maximize TFO validation when keys are rotated. A randomly chosen primary key may be configured by the kernel if the tcp_fastopen sysctl is set to 0x400 (see above), or if the TCP_FASTOPEN setsockopt() optname is set and a key has not been previously configured via sysctl. If keys are configured via setsockopt() by using the TCP_FASTOPEN_KEY optname, then those per-socket keys will be used instead of any keys that are specified via sysctl. A key is specified as 4 8-digit hexadecimal integers which are separated by a '-' as: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx. Leading zeros may be omitted. A primary and a backup key may be specified by separating them by a comma. If only one key is specified, it becomes the primary key and any previously configured backup keys are removed. h](h)}(hHtcp_fastopen_key - list of comma separated 32-digit hexadecimal INTEGERsh]hHtcp_fastopen_key - list of comma separated 32-digit hexadecimal INTEGERs}(hj1)hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM5hj-)ubj )}(hhh](j)}(hXThe list consists of a primary key and an optional backup key. The primary key is used for both creating and validating cookies, while the optional backup key is only used for validating cookies. The purpose of the backup key is to maximize TFO validation when keys are rotated.h]hXThe list consists of a primary key and an optional backup key. The primary key is used for both creating and validating cookies, while the optional backup key is only used for validating cookies. The purpose of the backup key is to maximize TFO validation when keys are rotated.}(hjB)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$hj?)ubj)}(hXA randomly chosen primary key may be configured by the kernel if the tcp_fastopen sysctl is set to 0x400 (see above), or if the TCP_FASTOPEN setsockopt() optname is set and a key has not been previously configured via sysctl. If keys are configured via setsockopt() by using the TCP_FASTOPEN_KEY optname, then those per-socket keys will be used instead of any keys that are specified via sysctl.h]hXA randomly chosen primary key may be configured by the kernel if the tcp_fastopen sysctl is set to 0x400 (see above), or if the TCP_FASTOPEN setsockopt() optname is set and a key has not been previously configured via sysctl. If keys are configured via setsockopt() by using the TCP_FASTOPEN_KEY optname, then those per-socket keys will be used instead of any keys that are specified via sysctl.}(hjP)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM)hj?)ubj)}(hXSA key is specified as 4 8-digit hexadecimal integers which are separated by a '-' as: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx. Leading zeros may be omitted. A primary and a backup key may be specified by separating them by a comma. If only one key is specified, it becomes the primary key and any previously configured backup keys are removed.h]hXWA key is specified as 4 8-digit hexadecimal integers which are separated by a ‘-’ as: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx. Leading zeros may be omitted. A primary and a backup key may be specified by separating them by a comma. If only one key is specified, it becomes the primary key and any previously configured backup keys are removed.}(hj^)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM1hj?)ubeh}(h]h ]h"]h$]h&]uh1j hj-)ubeh}(h]h ]h"]h$]h&]uh1hhhhM5hj.hhubh)}(hXtcp_syn_retries - INTEGER Number of times initial SYNs for an active TCP connection attempt will be retransmitted. Should not be higher than 127. Default value is 6, which corresponds to 67seconds (with tcp_syn_linear_timeouts = 4) till the last retransmission with the current initial RTO of 1second. With this the final timeout for an active TCP connection attempt will happen after 131seconds. h](h)}(htcp_syn_retries - INTEGERh]htcp_syn_retries - INTEGER}(hj|)hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM=hjx)ubj )}(hhh]j)}(hXrNumber of times initial SYNs for an active TCP connection attempt will be retransmitted. Should not be higher than 127. Default value is 6, which corresponds to 67seconds (with tcp_syn_linear_timeouts = 4) till the last retransmission with the current initial RTO of 1second. With this the final timeout for an active TCP connection attempt will happen after 131seconds.h]hXrNumber of times initial SYNs for an active TCP connection attempt will be retransmitted. Should not be higher than 127. Default value is 6, which corresponds to 67seconds (with tcp_syn_linear_timeouts = 4) till the last retransmission with the current initial RTO of 1second. With this the final timeout for an active TCP connection attempt will happen after 131seconds.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM8hj)ubah}(h]h ]h"]h$]h&]uh1j hjx)ubeh}(h]h ]h"]h$]h&]uh1hhhhM=hj.hhubh)}(hX tcp_timestamps - INTEGER Enable timestamps as defined in RFC1323. - 0: Disabled. - 1: Enable timestamps as defined in RFC1323 and use random offset for each connection rather than only using the current time. - 2: Like 1, but without random offsets. Default: 1 h](h)}(htcp_timestamps - INTEGERh]htcp_timestamps - INTEGER}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMGhj)ubj )}(hhh](j)}(h(Enable timestamps as defined in RFC1323.h]h(Enable timestamps as defined in RFC1323.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM@hj)ubj;)}(hhh](j@)}(h 0: Disabled.h]j)}(hj)h]h 0: Disabled.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMBhj)ubah}(h]h ]h"]h$]h&]uh1j?hj)ubj@)}(h}1: Enable timestamps as defined in RFC1323 and use random offset for each connection rather than only using the current time.h]j)}(h}1: Enable timestamps as defined in RFC1323 and use random offset for each connection rather than only using the current time.h]h}1: Enable timestamps as defined in RFC1323 and use random offset for each connection rather than only using the current time.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMChj)ubah}(h]h ]h"]h$]h&]uh1j?hj)ubj@)}(h'2: Like 1, but without random offsets. h]j)}(h&2: Like 1, but without random offsets.h]h&2: Like 1, but without random offsets.}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMEhj)ubah}(h]h ]h"]h$]h&]uh1j?hj)ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMBhj)ubj)}(h Default: 1h]h Default: 1}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMGhj)ubeh}(h]h ]h"]h$]h&]uh1j hj)ubeh}(h]h ]h"]h$]h&]uh1hhhhMGhj.hhubh)}(hXltcp_min_tso_segs - INTEGER Minimal number of segments per TSO frame. Since linux-3.12, TCP does an automatic sizing of TSO frames, depending on flow rate, instead of filling 64Kbytes packets. For specific usages, it's possible to force TCP to build big TSO frames. Note that TCP stack might split too big TSO packets if available window is too small. Default: 2 h](h)}(htcp_min_tso_segs - INTEGERh]htcp_min_tso_segs - INTEGER}(hj8*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMRhj4*ubj )}(hhh](j)}(h)Minimal number of segments per TSO frame.h]h)Minimal number of segments per TSO frame.}(hjI*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMJhjF*ubj)}(hXSince linux-3.12, TCP does an automatic sizing of TSO frames, depending on flow rate, instead of filling 64Kbytes packets. For specific usages, it's possible to force TCP to build big TSO frames. Note that TCP stack might split too big TSO packets if available window is too small.h]hXSince linux-3.12, TCP does an automatic sizing of TSO frames, depending on flow rate, instead of filling 64Kbytes packets. For specific usages, it’s possible to force TCP to build big TSO frames. Note that TCP stack might split too big TSO packets if available window is too small.}(hjW*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMLhjF*ubj)}(h Default: 2h]h Default: 2}(hje*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMRhjF*ubeh}(h]h ]h"]h$]h&]uh1j hj4*ubeh}(h]h ]h"]h$]h&]uh1hhhhMRhj.hhubh)}(hXttcp_tso_rtt_log - INTEGER Adjustment of TSO packet sizes based on min_rtt Starting from linux-5.18, TCP autosizing can be tweaked for flows having small RTT. Old autosizing was splitting the pacing budget to send 1024 TSO per second. tso_packet_size = sk->sk_pacing_rate / 1024; With the new mechanism, we increase this TSO sizing using: distance = min_rtt_usec / (2^tcp_tso_rtt_log) tso_packet_size += gso_max_size >> distance; This means that flows between very close hosts can use bigger TSO packets, reducing their cpu costs. If you want to use the old autosizing, set this sysctl to 0. Default: 9 (2^9 = 512 usec) h](h)}(htcp_tso_rtt_log - INTEGERh]htcp_tso_rtt_log - INTEGER}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMihj*ubj )}(hhh](j)}(h/Adjustment of TSO packet sizes based on min_rtth]h/Adjustment of TSO packet sizes based on min_rtt}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMUhj*ubj)}(hSStarting from linux-5.18, TCP autosizing can be tweaked for flows having small RTT.h]hSStarting from linux-5.18, TCP autosizing can be tweaked for flows having small RTT.}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMWhj*ubj)}(hKOld autosizing was splitting the pacing budget to send 1024 TSO per second.h]hKOld autosizing was splitting the pacing budget to send 1024 TSO per second.}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMZhj*ubj)}(h,tso_packet_size = sk->sk_pacing_rate / 1024;h]h,tso_packet_size = sk->sk_pacing_rate / 1024;}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM]hj*ubj)}(h:With the new mechanism, we increase this TSO sizing using:h]h:With the new mechanism, we increase this TSO sizing using:}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM_hj*ubj)}(hZdistance = min_rtt_usec / (2^tcp_tso_rtt_log) tso_packet_size += gso_max_size >> distance;h]hZdistance = min_rtt_usec / (2^tcp_tso_rtt_log) tso_packet_size += gso_max_size >> distance;}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMahj*ubj)}(hdThis means that flows between very close hosts can use bigger TSO packets, reducing their cpu costs.h]hdThis means that flows between very close hosts can use bigger TSO packets, reducing their cpu costs.}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMdhj*ubj)}(hsk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in slow start, tcp_pacing_ss_ratio is applied to let TCP probe for bigger speeds, assuming cwnd can be doubled every other RTT. Default: 200 h](h)}(htcp_pacing_ss_ratio - INTEGERh]htcp_pacing_ss_ratio - INTEGER}(hj"+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMrhj+ubj )}(hhh](j)}(hsk->sk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in slow start, tcp_pacing_ss_ratio is applied to let TCP probe for bigger speeds, assuming cwnd can be doubled every other RTT.h]hsk->sk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in slow start, tcp_pacing_ss_ratio is applied to let TCP probe for bigger speeds, assuming cwnd can be doubled every other RTT.}(hj3+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMlhj0+ubj)}(h Default: 200h]h Default: 200}(hjA+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhj0+ubeh}(h]h ]h"]h$]h&]uh1j hj+ubeh}(h]h ]h"]h$]h&]uh1hhhhMrhj.hhubh)}(hXtcp_pacing_ca_ratio - INTEGER sk->sk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in congestion avoidance phase, tcp_pacing_ca_ratio is applied to conservatively probe for bigger throughput. Default: 120 h](h)}(htcp_pacing_ca_ratio - INTEGERh]htcp_pacing_ca_ratio - INTEGER}(hj_+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMzhj[+ubj )}(hhh](j)}(hsk->sk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in congestion avoidance phase, tcp_pacing_ca_ratio is applied to conservatively probe for bigger throughput.h]hsk->sk_pacing_rate is set by TCP stack using a ratio applied to current rate. (current_rate = cwnd * mss / srtt) If TCP is in congestion avoidance phase, tcp_pacing_ca_ratio is applied to conservatively probe for bigger throughput.}(hjp+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMuhjm+ubj)}(h Default: 120h]h Default: 120}(hj~+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMzhjm+ubeh}(h]h ]h"]h$]h&]uh1j hj[+ubeh}(h]h ]h"]h$]h&]uh1hhhhMzhj.hhubh)}(hXtcp_syn_linear_timeouts - INTEGER The number of times for an active TCP connection to retransmit SYNs with a linear backoff timeout before defaulting to an exponential backoff timeout. This has no effect on SYNACK at the passive TCP side. With an initial RTO of 1 and tcp_syn_linear_timeouts = 4 we would expect SYN RTOs to be: 1, 1, 1, 1, 1, 2, 4, ... (4 linear timeouts, and the first exponential backoff using 2^0 * initial_RTO). Default: 4 h](h)}(h!tcp_syn_linear_timeouts - INTEGERh]h!tcp_syn_linear_timeouts - INTEGER}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj+ubj )}(hhh](j)}(hThe number of times for an active TCP connection to retransmit SYNs with a linear backoff timeout before defaulting to an exponential backoff timeout. This has no effect on SYNACK at the passive TCP side.h]hThe number of times for an active TCP connection to retransmit SYNs with a linear backoff timeout before defaulting to an exponential backoff timeout. This has no effect on SYNACK at the passive TCP side.}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM}hj+ubj)}(hWith an initial RTO of 1 and tcp_syn_linear_timeouts = 4 we would expect SYN RTOs to be: 1, 1, 1, 1, 1, 2, 4, ... (4 linear timeouts, and the first exponential backoff using 2^0 * initial_RTO). Default: 4h]hWith an initial RTO of 1 and tcp_syn_linear_timeouts = 4 we would expect SYN RTOs to be: 1, 1, 1, 1, 1, 2, 4, ... (4 linear timeouts, and the first exponential backoff using 2^0 * initial_RTO). Default: 4}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj+ubeh}(h]h ]h"]h$]h&]uh1j hj+ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_tso_win_divisor - INTEGER This allows control over what percentage of the congestion window can be consumed by a single TSO frame. The setting of this parameter is a choice between burstiness and building larger TSO frames. Default: 3 h](h)}(htcp_tso_win_divisor - INTEGERh]htcp_tso_win_divisor - INTEGER}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj+ubj )}(hhh](j)}(hThis allows control over what percentage of the congestion window can be consumed by a single TSO frame. The setting of this parameter is a choice between burstiness and building larger TSO frames.h]hThis allows control over what percentage of the congestion window can be consumed by a single TSO frame. The setting of this parameter is a choice between burstiness and building larger TSO frames.}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj+ubj)}(h Default: 3h]h Default: 3}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj+ubeh}(h]h ]h"]h$]h&]uh1j hj+ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_tw_reuse - INTEGER Enable reuse of TIME-WAIT sockets for new connections when it is safe from protocol viewpoint. - 0 - disable - 1 - global enable - 2 - enable for loopback traffic only It should not be changed without advice/request of technical experts. Default: 2 h](h)}(htcp_tw_reuse - INTEGERh]htcp_tw_reuse - INTEGER}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj,ubj )}(hhh](j)}(h^Enable reuse of TIME-WAIT sockets for new connections when it is safe from protocol viewpoint.h]h^Enable reuse of TIME-WAIT sockets for new connections when it is safe from protocol viewpoint.}(hj',hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$,ubj;)}(hhh](j@)}(h 0 - disableh]j)}(hj:,h]h 0 - disable}(hj<,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj8,ubah}(h]h ]h"]h$]h&]uh1j?hj5,ubj@)}(h1 - global enableh]j)}(hjQ,h]h1 - global enable}(hjS,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjO,ubah}(h]h ]h"]h$]h&]uh1j?hj5,ubj@)}(h%2 - enable for loopback traffic only h]j)}(h$2 - enable for loopback traffic onlyh]h$2 - enable for loopback traffic only}(hjj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjf,ubah}(h]h ]h"]h$]h&]uh1j?hj5,ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj$,ubj)}(hEIt should not be changed without advice/request of technical experts.h]hEIt should not be changed without advice/request of technical experts.}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$,ubj)}(h Default: 2h]h Default: 2}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$,ubeh}(h]h ]h"]h$]h&]uh1j hj,ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXstcp_tw_reuse_delay - UNSIGNED INTEGER The delay in milliseconds before a TIME-WAIT socket can be reused by a new connection, if TIME-WAIT socket reuse is enabled. The actual reuse threshold is within [N, N+1] range, where N is the requested delay in milliseconds, to ensure the delay interval is never shorter than the configured value. This setting contains an assumption about the other TCP timestamp clock tick interval. It should not be set to a value lower than the peer's clock tick for PAWS (Protection Against Wrapped Sequence numbers) mechanism work correctly for the reused connection. Default: 1000 (milliseconds) h](h)}(h%tcp_tw_reuse_delay - UNSIGNED INTEGERh]h%tcp_tw_reuse_delay - UNSIGNED INTEGER}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj,ubj )}(hhh](j)}(hX*The delay in milliseconds before a TIME-WAIT socket can be reused by a new connection, if TIME-WAIT socket reuse is enabled. The actual reuse threshold is within [N, N+1] range, where N is the requested delay in milliseconds, to ensure the delay interval is never shorter than the configured value.h]hX*The delay in milliseconds before a TIME-WAIT socket can be reused by a new connection, if TIME-WAIT socket reuse is enabled. The actual reuse threshold is within [N, N+1] range, where N is the requested delay in milliseconds, to ensure the delay interval is never shorter than the configured value.}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj,ubj)}(hXThis setting contains an assumption about the other TCP timestamp clock tick interval. It should not be set to a value lower than the peer's clock tick for PAWS (Protection Against Wrapped Sequence numbers) mechanism work correctly for the reused connection.h]hXThis setting contains an assumption about the other TCP timestamp clock tick interval. It should not be set to a value lower than the peer’s clock tick for PAWS (Protection Against Wrapped Sequence numbers) mechanism work correctly for the reused connection.}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj,ubj)}(hDefault: 1000 (milliseconds)h]hDefault: 1000 (milliseconds)}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj,ubeh}(h]h ]h"]h$]h&]uh1j hj,ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_window_scaling - BOOLEAN Enable window scaling as defined in RFC1323. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_window_scaling - BOOLEANh]htcp_window_scaling - BOOLEAN}(hj,hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj,ubj )}(hhh](j)}(h,Enable window scaling as defined in RFC1323.h]h,Enable window scaling as defined in RFC1323.}(hj -hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj -ubj)}(hPossible values:h]hPossible values:}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj -ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj--h]h 0 (disabled)}(hj/-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj+-ubah}(h]h ]h"]h$]h&]uh1j?hj(-ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjF-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjB-ubah}(h]h ]h"]h$]h&]uh1j?hj(-ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj -ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj`-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj -ubeh}(h]h ]h"]h$]h&]uh1j hj,ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hX7tcp_shrink_window - BOOLEAN This changes how the TCP receive window is calculated. RFC 7323, section 2.4, says there are instances when a retracted window can be offered, and that TCP implementations MUST ensure that they handle a shrinking window, as specified in RFC 1122. Possible values: - 0 (disabled) - The window is never shrunk. - 1 (enabled) - The window is shrunk when necessary to remain within the memory limit set by autotuning (sk_rcvbuf). This only occurs if a non-zero receive window scaling factor is also in effect. Default: 0 (disabled) h](h)}(htcp_shrink_window - BOOLEANh]htcp_shrink_window - BOOLEAN}(hj~-hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjz-ubj )}(hhh](j)}(h6This changes how the TCP receive window is calculated.h]h6This changes how the TCP receive window is calculated.}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubj)}(hRFC 7323, section 2.4, says there are instances when a retracted window can be offered, and that TCP implementations MUST ensure that they handle a shrinking window, as specified in RFC 1122.h]hRFC 7323, section 2.4, says there are instances when a retracted window can be offered, and that TCP implementations MUST ensure that they handle a shrinking window, as specified in RFC 1122.}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubj)}(hPossible values:h]hPossible values:}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubj;)}(hhh](j@)}(h*0 (disabled) - The window is never shrunk.h]j)}(hj-h]h*0 (disabled) - The window is never shrunk.}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubah}(h]h ]h"]h$]h&]uh1j?hj-ubj@)}(h1 (enabled) - The window is shrunk when necessary to remain within the memory limit set by autotuning (sk_rcvbuf). This only occurs if a non-zero receive window scaling factor is also in effect. h]j)}(h1 (enabled) - The window is shrunk when necessary to remain within the memory limit set by autotuning (sk_rcvbuf). This only occurs if a non-zero receive window scaling factor is also in effect.h]h1 (enabled) - The window is shrunk when necessary to remain within the memory limit set by autotuning (sk_rcvbuf). This only occurs if a non-zero receive window scaling factor is also in effect.}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubah}(h]h ]h"]h$]h&]uh1j?hj-ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj-ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-ubeh}(h]h ]h"]h$]h&]uh1j hjz-ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_wmem - vector of 3 INTEGERs: min, default, max min: Amount of memory reserved for send buffers for TCP sockets. Each TCP socket has rights to use it due to fact of its birth. Default: 4K default: initial size of send buffer used by TCP sockets. This value overrides net.core.wmem_default used by other protocols. It is usually lower than net.core.wmem_default. Default: 16K max: Maximal amount of memory allowed for automatically tuned send buffers for TCP sockets. This value does not override net.core.wmem_max. Calling setsockopt() with SO_SNDBUF disables automatic tuning of that socket's send buffer size, in which case this value is ignored. Default: between 64K and 4MB, depending on RAM size. h](h)}(h2tcp_wmem - vector of 3 INTEGERs: min, default, maxh]h2tcp_wmem - vector of 3 INTEGERs: min, default, max}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj .ubj )}(hhh](j)}(hmin: Amount of memory reserved for send buffers for TCP sockets. Each TCP socket has rights to use it due to fact of its birth.h]hmin: Amount of memory reserved for send buffers for TCP sockets. Each TCP socket has rights to use it due to fact of its birth.}(hj .hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(h Default: 4Kh]h Default: 4K}(hj..hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(h~default: initial size of send buffer used by TCP sockets. This value overrides net.core.wmem_default used by other protocols.h]h~default: initial size of send buffer used by TCP sockets. This value overrides net.core.wmem_default used by other protocols.}(hj<.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(h/It is usually lower than net.core.wmem_default.h]h/It is usually lower than net.core.wmem_default.}(hjJ.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(h Default: 16Kh]h Default: 16K}(hjX.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(hXmax: Maximal amount of memory allowed for automatically tuned send buffers for TCP sockets. This value does not override net.core.wmem_max. Calling setsockopt() with SO_SNDBUF disables automatic tuning of that socket's send buffer size, in which case this value is ignored.h]hXmax: Maximal amount of memory allowed for automatically tuned send buffers for TCP sockets. This value does not override net.core.wmem_max. Calling setsockopt() with SO_SNDBUF disables automatic tuning of that socket’s send buffer size, in which case this value is ignored.}(hjf.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(h4Default: between 64K and 4MB, depending on RAM size.h]h4Default: between 64K and 4MB, depending on RAM size.}(hjt.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubeh}(h]h ]h"]h$]h&]uh1j hj .ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hX.tcp_notsent_lowat - UNSIGNED INTEGER A TCP socket can control the amount of unsent bytes in its write queue, thanks to TCP_NOTSENT_LOWAT socket option. poll()/select()/epoll() reports POLLOUT events if the amount of unsent bytes is below a per socket value, and if the write queue is not full. sendmsg() will also not add new buffers if the limit is hit. This global variable controls the amount of unsent data for sockets not using TCP_NOTSENT_LOWAT. For these sockets, a change to the global variable has immediate effect. Default: UINT_MAX (0xFFFFFFFF) h](h)}(h$tcp_notsent_lowat - UNSIGNED INTEGERh]h$tcp_notsent_lowat - UNSIGNED INTEGER}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj.ubj )}(hhh](j)}(hX=A TCP socket can control the amount of unsent bytes in its write queue, thanks to TCP_NOTSENT_LOWAT socket option. poll()/select()/epoll() reports POLLOUT events if the amount of unsent bytes is below a per socket value, and if the write queue is not full. sendmsg() will also not add new buffers if the limit is hit.h]hX=A TCP socket can control the amount of unsent bytes in its write queue, thanks to TCP_NOTSENT_LOWAT socket option. poll()/select()/epoll() reports POLLOUT events if the amount of unsent bytes is below a per socket value, and if the write queue is not full. sendmsg() will also not add new buffers if the limit is hit.}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(hThis global variable controls the amount of unsent data for sockets not using TCP_NOTSENT_LOWAT. For these sockets, a change to the global variable has immediate effect.h]hThis global variable controls the amount of unsent data for sockets not using TCP_NOTSENT_LOWAT. For these sockets, a change to the global variable has immediate effect.}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(hDefault: UINT_MAX (0xFFFFFFFF)h]hDefault: UINT_MAX (0xFFFFFFFF)}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubeh}(h]h ]h"]h$]h&]uh1j hj.ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXatcp_workaround_signed_windows - BOOLEAN If enabled, assume no receipt of a window scaling option means the remote TCP is broken and treats the window as a signed quantity. If disabled, assume the remote TCP is not broken even if we do not receive a window scaling option from them. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h'tcp_workaround_signed_windows - BOOLEANh]h'tcp_workaround_signed_windows - BOOLEAN}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj.ubj )}(hhh](j)}(hIf enabled, assume no receipt of a window scaling option means the remote TCP is broken and treats the window as a signed quantity. If disabled, assume the remote TCP is not broken even if we do not receive a window scaling option from them.h]hIf enabled, assume no receipt of a window scaling option means the remote TCP is broken and treats the window as a signed quantity. If disabled, assume the remote TCP is not broken even if we do not receive a window scaling option from them.}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj)}(hPossible values:h]hPossible values:}(hj.hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj/h]h 0 (disabled)}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj /ubah}(h]h ]h"]h$]h&]uh1j?hj /ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj(/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj$/ubah}(h]h ]h"]h$]h&]uh1j?hj /ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj.ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjB/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.ubeh}(h]h ]h"]h$]h&]uh1j hj.ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXgtcp_thin_linear_timeouts - BOOLEAN Enable dynamic triggering of linear timeouts for thin streams. If enabled, a check is performed upon retransmission by timeout to determine if the stream is thin (less than 4 packets in flight). As long as the stream is found to be thin, up to 6 linear timeouts may be performed before exponential backoff mode is initiated. This improves retransmission latency for non-aggressive thin streams, often found to be time-dependent. For more information on thin streams, see Documentation/networking/tcp-thin.rst Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h"tcp_thin_linear_timeouts - BOOLEANh]h"tcp_thin_linear_timeouts - BOOLEAN}(hj`/hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj\/ubj )}(hhh](j)}(hXEnable dynamic triggering of linear timeouts for thin streams. If enabled, a check is performed upon retransmission by timeout to determine if the stream is thin (less than 4 packets in flight). As long as the stream is found to be thin, up to 6 linear timeouts may be performed before exponential backoff mode is initiated. This improves retransmission latency for non-aggressive thin streams, often found to be time-dependent. For more information on thin streams, see Documentation/networking/tcp-thin.rsth]hXEnable dynamic triggering of linear timeouts for thin streams. If enabled, a check is performed upon retransmission by timeout to determine if the stream is thin (less than 4 packets in flight). As long as the stream is found to be thin, up to 6 linear timeouts may be performed before exponential backoff mode is initiated. This improves retransmission latency for non-aggressive thin streams, often found to be time-dependent. For more information on thin streams, see Documentation/networking/tcp-thin.rst}(hjq/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjn/ubj)}(hPossible values:h]hPossible values:}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjn/ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj/h]h 0 (disabled)}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj/ubah}(h]h ]h"]h$]h&]uh1j?hj/ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj/ubah}(h]h ]h"]h$]h&]uh1j?hj/ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjn/ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjn/ubeh}(h]h ]h"]h$]h&]uh1j hj\/ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_limit_output_bytes - INTEGER Controls TCP Small Queue limit per tcp socket. TCP bulk sender tends to increase packets in flight until it gets losses notifications. With SNDBUF autotuning, this can result in a large amount of packets queued on the local machine (e.g.: qdiscs, CPU backlog, or device) hurting latency of other flows, for typical pfifo_fast qdiscs. tcp_limit_output_bytes limits the number of bytes on qdisc or device to reduce artificial RTT/cwnd and reduce bufferbloat. Default: 4194304 (4 MB) h](h)}(h tcp_limit_output_bytes - INTEGERh]h tcp_limit_output_bytes - INTEGER}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj/ubj )}(hhh](j)}(hXControls TCP Small Queue limit per tcp socket. TCP bulk sender tends to increase packets in flight until it gets losses notifications. With SNDBUF autotuning, this can result in a large amount of packets queued on the local machine (e.g.: qdiscs, CPU backlog, or device) hurting latency of other flows, for typical pfifo_fast qdiscs. tcp_limit_output_bytes limits the number of bytes on qdisc or device to reduce artificial RTT/cwnd and reduce bufferbloat.h]hXControls TCP Small Queue limit per tcp socket. TCP bulk sender tends to increase packets in flight until it gets losses notifications. With SNDBUF autotuning, this can result in a large amount of packets queued on the local machine (e.g.: qdiscs, CPU backlog, or device) hurting latency of other flows, for typical pfifo_fast qdiscs. tcp_limit_output_bytes limits the number of bytes on qdisc or device to reduce artificial RTT/cwnd and reduce bufferbloat.}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj/ubj)}(hDefault: 4194304 (4 MB)h]hDefault: 4194304 (4 MB)}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj/ubeh}(h]h ]h"]h$]h&]uh1j hj/ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXatcp_challenge_ack_limit - INTEGER Limits number of Challenge ACK sent per second, as recommended in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks) Note that this per netns rate limit can allow some side channel attacks and probably should not be enabled. TCP stack implements per TCP socket limits anyway. Default: INT_MAX (unlimited) h](h)}(h!tcp_challenge_ack_limit - INTEGERh]h!tcp_challenge_ack_limit - INTEGER}(hj 0hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj0ubj )}(hhh]j)}(hX>Limits number of Challenge ACK sent per second, as recommended in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks) Note that this per netns rate limit can allow some side channel attacks and probably should not be enabled. TCP stack implements per TCP socket limits anyway. Default: INT_MAX (unlimited)h]hX@Limits number of Challenge ACK sent per second, as recommended in RFC 5961 (Improving TCP’s Robustness to Blind In-Window Attacks) Note that this per netns rate limit can allow some side channel attacks and probably should not be enabled. TCP stack implements per TCP socket limits anyway. Default: INT_MAX (unlimited)}(hj10hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj.0ubah}(h]h ]h"]h$]h&]uh1j hj0ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(htcp_ehash_entries - INTEGER Show the number of hash buckets for TCP sockets in the current networking namespace. A negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace's one. h](h)}(htcp_ehash_entries - INTEGERh]htcp_ehash_entries - INTEGER}(hjO0hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjK0ubj )}(hhh](j)}(hTShow the number of hash buckets for TCP sockets in the current networking namespace.h]hTShow the number of hash buckets for TCP sockets in the current networking namespace.}(hj`0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj]0ubj)}(hA negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace's one.h]hA negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace’s one.}(hjn0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj]0ubeh}(h]h ]h"]h$]h&]uh1j hjK0ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hX`tcp_child_ehash_entries - INTEGER Control the number of hash buckets for TCP sockets in the child networking namespace, which must be set before clone() or unshare(). If the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace's hash buckets. Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process's NUMA policy, which could result in performance differences. Note also that the default value of tcp_max_tw_buckets and tcp_max_syn_backlog depend on the hash bucket size. Possible values: 0, 2^n (n: 0 - 24 (16Mi)) Default: 0 h](h)}(h!tcp_child_ehash_entries - INTEGERh]h!tcp_child_ehash_entries - INTEGER}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM4hj0ubj )}(hhh](j)}(hControl the number of hash buckets for TCP sockets in the child networking namespace, which must be set before clone() or unshare().h]hControl the number of hash buckets for TCP sockets in the child networking namespace, which must be set before clone() or unshare().}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM!hj0ubj)}(hIf the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace's hash buckets.h]hIf the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace’s hash buckets.}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$hj0ubj)}(hX3Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process's NUMA policy, which could result in performance differences.h]hX5Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process’s NUMA policy, which could result in performance differences.}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM)hj0ubj)}(hnNote also that the default value of tcp_max_tw_buckets and tcp_max_syn_backlog depend on the hash bucket size.h]hnNote also that the default value of tcp_max_tw_buckets and tcp_max_syn_backlog depend on the hash bucket size.}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/hj0ubj)}(h*Possible values: 0, 2^n (n: 0 - 24 (16Mi))h]h*Possible values: 0, 2^n (n: 0 - 24 (16Mi))}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM2hj0ubj)}(h Default: 0h]h Default: 0}(hj0hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4hj0ubeh}(h]h ]h"]h$]h&]uh1j hj0ubeh}(h]h ]h"]h$]h&]uh1hhhhM4hj.hhubh)}(hXtcp_plb_enabled - BOOLEAN If enabled and the underlying congestion control (e.g. DCTCP) supports and enables PLB feature, TCP PLB (Protective Load Balancing) is enabled. PLB is described in the following paper: https://doi.org/10.1145/3544216.3544226. Based on PLB parameters, upon sensing sustained congestion, TCP triggers a change in flow label field for outgoing IPv6 packets. A change in flow label field potentially changes the path of outgoing packets for switches that use ECMP/WCMP for routing. PLB changes socket txhash which results in a change in IPv6 Flow Label field, and currently no-op for IPv4 headers. It is possible to apply PLB for IPv4 with other network header fields (e.g. TCP or IPv4 options) or using encapsulation where outer header is used by switches to determine next hop. In either case, further host and switch side changes will be needed. If enabled, PLB assumes that congestion signal (e.g. ECN) is made available and used by congestion control module to estimate a congestion measure (e.g. ce_ratio). PLB needs a congestion measure to make repathing decisions. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(htcp_plb_enabled - BOOLEANh]htcp_plb_enabled - BOOLEAN}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMQhj0ubj )}(hhh](j)}(hXIf enabled and the underlying congestion control (e.g. DCTCP) supports and enables PLB feature, TCP PLB (Protective Load Balancing) is enabled. PLB is described in the following paper: https://doi.org/10.1145/3544216.3544226. Based on PLB parameters, upon sensing sustained congestion, TCP triggers a change in flow label field for outgoing IPv6 packets. A change in flow label field potentially changes the path of outgoing packets for switches that use ECMP/WCMP for routing.h](hIf enabled and the underlying congestion control (e.g. DCTCP) supports and enables PLB feature, TCP PLB (Protective Load Balancing) is enabled. PLB is described in the following paper: }(hj1hhhNhNubh reference)}(h'https://doi.org/10.1145/3544216.3544226h]h'https://doi.org/10.1145/3544216.3544226}(hj1hhhNhNubah}(h]h ]h"]h$]h&]refurij1uh1j1hj1ubh. Based on PLB parameters, upon sensing sustained congestion, TCP triggers a change in flow label field for outgoing IPv6 packets. A change in flow label field potentially changes the path of outgoing packets for switches that use ECMP/WCMP for routing.}(hj1hhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhM7hj1ubj)}(hXnPLB changes socket txhash which results in a change in IPv6 Flow Label field, and currently no-op for IPv4 headers. It is possible to apply PLB for IPv4 with other network header fields (e.g. TCP or IPv4 options) or using encapsulation where outer header is used by switches to determine next hop. In either case, further host and switch side changes will be needed.h]hXnPLB changes socket txhash which results in a change in IPv6 Flow Label field, and currently no-op for IPv4 headers. It is possible to apply PLB for IPv4 with other network header fields (e.g. TCP or IPv4 options) or using encapsulation where outer header is used by switches to determine next hop. In either case, further host and switch side changes will be needed.}(hj51hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM@hj1ubj)}(hIf enabled, PLB assumes that congestion signal (e.g. ECN) is made available and used by congestion control module to estimate a congestion measure (e.g. ce_ratio). PLB needs a congestion measure to make repathing decisions.h]hIf enabled, PLB assumes that congestion signal (e.g. ECN) is made available and used by congestion control module to estimate a congestion measure (e.g. ce_ratio). PLB needs a congestion measure to make repathing decisions.}(hjC1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMGhj1ubj)}(hPossible values:h]hPossible values:}(hjQ1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMLhj1ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjd1h]h 0 (disabled)}(hjf1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMNhjb1ubah}(h]h ]h"]h$]h&]uh1j?hj_1ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj}1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMOhjy1ubah}(h]h ]h"]h$]h&]uh1j?hj_1ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMNhj1ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQhj1ubeh}(h]h ]h"]h$]h&]uh1j hj0ubeh}(h]h ]h"]h$]h&]uh1hhhhMQhj.hhubh)}(hXtcp_plb_idle_rehash_rounds - INTEGER Number of consecutive congested rounds (RTT) seen after which a rehash can be performed, given there are no packets in flight. This is referred to as M in PLB paper: https://doi.org/10.1145/3544216.3544226. Possible Values: 0 - 31 Default: 3 h](h)}(h$tcp_plb_idle_rehash_rounds - INTEGERh]h$tcp_plb_idle_rehash_rounds - INTEGER}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM[hj1ubj )}(hhh](j)}(hNumber of consecutive congested rounds (RTT) seen after which a rehash can be performed, given there are no packets in flight. This is referred to as M in PLB paper: https://doi.org/10.1145/3544216.3544226.h](hNumber of consecutive congested rounds (RTT) seen after which a rehash can be performed, given there are no packets in flight. This is referred to as M in PLB paper: }(hj1hhhNhNubj1)}(h'https://doi.org/10.1145/3544216.3544226h]h'https://doi.org/10.1145/3544216.3544226}(hj1hhhNhNubah}(h]h ]h"]h$]h&]refurij1uh1j1hj1ubh.}(hj1hhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMThj1ubj)}(hPossible Values: 0 - 31h]hPossible Values: 0 - 31}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMYhj1ubj)}(h Default: 3h]h Default: 3}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM[hj1ubeh}(h]h ]h"]h$]h&]uh1j hj1ubeh}(h]h ]h"]h$]h&]uh1hhhhM[hj.hhubh)}(hXVtcp_plb_rehash_rounds - INTEGER Number of consecutive congested rounds (RTT) seen after which a forced rehash can be performed. Be careful when setting this parameter, as a small value increases the risk of retransmissions. This is referred to as N in PLB paper: https://doi.org/10.1145/3544216.3544226. Possible Values: 0 - 31 Default: 12 h](h)}(htcp_plb_rehash_rounds - INTEGERh]htcp_plb_rehash_rounds - INTEGER}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMfhj2ubj )}(hhh](j)}(hXNumber of consecutive congested rounds (RTT) seen after which a forced rehash can be performed. Be careful when setting this parameter, as a small value increases the risk of retransmissions. This is referred to as N in PLB paper: https://doi.org/10.1145/3544216.3544226.h](hNumber of consecutive congested rounds (RTT) seen after which a forced rehash can be performed. Be careful when setting this parameter, as a small value increases the risk of retransmissions. This is referred to as N in PLB paper: }(hj$2hhhNhNubj1)}(h'https://doi.org/10.1145/3544216.3544226h]h'https://doi.org/10.1145/3544216.3544226}(hj,2hhhNhNubah}(h]h ]h"]h$]h&]refurij.2uh1j1hj$2ubh.}(hj$2hhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhM^hj!2ubj)}(hPossible Values: 0 - 31h]hPossible Values: 0 - 31}(hjE2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMdhj!2ubj)}(h Default: 12h]h Default: 12}(hjS2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMfhj!2ubeh}(h]h ]h"]h$]h&]uh1j hj2ubeh}(h]h ]h"]h$]h&]uh1hhhhMfhj.hhubh)}(hXtcp_plb_suspend_rto_sec - INTEGER Time, in seconds, to suspend PLB in event of an RTO. In order to avoid having PLB repath onto a connectivity "black hole", after an RTO a TCP connection suspends PLB repathing for a random duration between 1x and 2x of this parameter. Randomness is added to avoid concurrent rehashing of multiple TCP connections. This should be set corresponding to the amount of time it takes to repair a failed link. Possible Values: 0 - 255 Default: 60 h](h)}(h!tcp_plb_suspend_rto_sec - INTEGERh]h!tcp_plb_suspend_rto_sec - INTEGER}(hjq2hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMrhjm2ubj )}(hhh](j)}(hXTime, in seconds, to suspend PLB in event of an RTO. In order to avoid having PLB repath onto a connectivity "black hole", after an RTO a TCP connection suspends PLB repathing for a random duration between 1x and 2x of this parameter. Randomness is added to avoid concurrent rehashing of multiple TCP connections. This should be set corresponding to the amount of time it takes to repair a failed link.h]hXTime, in seconds, to suspend PLB in event of an RTO. In order to avoid having PLB repath onto a connectivity “black hole”, after an RTO a TCP connection suspends PLB repathing for a random duration between 1x and 2x of this parameter. Randomness is added to avoid concurrent rehashing of multiple TCP connections. This should be set corresponding to the amount of time it takes to repair a failed link.}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMihj2ubj)}(hPossible Values: 0 - 255h]hPossible Values: 0 - 255}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMphj2ubj)}(h Default: 60h]h Default: 60}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhj2ubeh}(h]h ]h"]h$]h&]uh1j hjm2ubeh}(h]h ]h"]h$]h&]uh1hhhhMrhj.hhubh)}(hXtcp_plb_cong_thresh - INTEGER Fraction of packets marked with congestion over a round (RTT) to tag that round as congested. This is referred to as K in the PLB paper: https://doi.org/10.1145/3544216.3544226. The 0-1 fraction range is mapped to 0-256 range to avoid floating point operations. For example, 128 means that if at least 50% of the packets in a round were marked as congested then the round will be tagged as congested. Setting threshold to 0 means that PLB repaths every RTT regardless of congestion. This is not intended behavior for PLB and should be used only for experimentation purpose. Possible Values: 0 - 256 Default: 128 h](h)}(htcp_plb_cong_thresh - INTEGERh]htcp_plb_cong_thresh - INTEGER}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj2ubj )}(hhh](j)}(hFraction of packets marked with congestion over a round (RTT) to tag that round as congested. This is referred to as K in the PLB paper: https://doi.org/10.1145/3544216.3544226.h](hFraction of packets marked with congestion over a round (RTT) to tag that round as congested. This is referred to as K in the PLB paper: }(hj2hhhNhNubj1)}(h'https://doi.org/10.1145/3544216.3544226h]h'https://doi.org/10.1145/3544216.3544226}(hj2hhhNhNubah}(h]h ]h"]h$]h&]refurij2uh1j1hj2ubh.}(hj2hhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMuhj2ubj)}(hThe 0-1 fraction range is mapped to 0-256 range to avoid floating point operations. For example, 128 means that if at least 50% of the packets in a round were marked as congested then the round will be tagged as congested.h]hThe 0-1 fraction range is mapped to 0-256 range to avoid floating point operations. For example, 128 means that if at least 50% of the packets in a round were marked as congested then the round will be tagged as congested.}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMyhj2ubj)}(hSetting threshold to 0 means that PLB repaths every RTT regardless of congestion. This is not intended behavior for PLB and should be used only for experimentation purpose.h]hSetting threshold to 0 means that PLB repaths every RTT regardless of congestion. This is not intended behavior for PLB and should be used only for experimentation purpose.}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM~hj2ubj)}(hPossible Values: 0 - 256h]hPossible Values: 0 - 256}(hj 3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj2ubj)}(h Default: 128h]h Default: 128}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj2ubeh}(h]h ]h"]h$]h&]uh1j hj2ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_pingpong_thresh - INTEGER The number of estimated data replies sent for estimated incoming data requests that must happen before TCP considers that a connection is a "ping-pong" (request-response) connection for which delayed acknowledgments can provide benefits. This threshold is 1 by default, but some applications may need a higher threshold for optimal performance. Possible Values: 1 - 255 Default: 1 h](h)}(htcp_pingpong_thresh - INTEGERh]htcp_pingpong_thresh - INTEGER}(hj63hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj23ubj )}(hhh](j)}(hThe number of estimated data replies sent for estimated incoming data requests that must happen before TCP considers that a connection is a "ping-pong" (request-response) connection for which delayed acknowledgments can provide benefits.h]hThe number of estimated data replies sent for estimated incoming data requests that must happen before TCP considers that a connection is a “ping-pong” (request-response) connection for which delayed acknowledgments can provide benefits.}(hjG3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjD3ubj)}(hjThis threshold is 1 by default, but some applications may need a higher threshold for optimal performance.h]hjThis threshold is 1 by default, but some applications may need a higher threshold for optimal performance.}(hjU3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjD3ubj)}(hPossible Values: 1 - 255h]hPossible Values: 1 - 255}(hjc3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjD3ubj)}(h Default: 1h]h Default: 1}(hjq3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjD3ubeh}(h]h ]h"]h$]h&]uh1j hj23ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_rto_min_us - INTEGER Minimal TCP retransmission timeout (in microseconds). Note that the rto_min route option has the highest precedence for configuring this setting, followed by the TCP_BPF_RTO_MIN and TCP_RTO_MIN_US socket options, followed by this tcp_rto_min_us sysctl. The recommended practice is to use a value less or equal to 200000 microseconds. Possible Values: 1 - INT_MAX Default: 200000 h](h)}(htcp_rto_min_us - INTEGERh]htcp_rto_min_us - INTEGER}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj3ubj )}(hhh](j)}(hMinimal TCP retransmission timeout (in microseconds). Note that the rto_min route option has the highest precedence for configuring this setting, followed by the TCP_BPF_RTO_MIN and TCP_RTO_MIN_US socket options, followed by this tcp_rto_min_us sysctl.h]hMinimal TCP retransmission timeout (in microseconds). Note that the rto_min route option has the highest precedence for configuring this setting, followed by the TCP_BPF_RTO_MIN and TCP_RTO_MIN_US socket options, followed by this tcp_rto_min_us sysctl.}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hPThe recommended practice is to use a value less or equal to 200000 microseconds.h]hPThe recommended practice is to use a value less or equal to 200000 microseconds.}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hPossible Values: 1 - INT_MAXh]hPossible Values: 1 - INT_MAX}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hDefault: 200000h]hDefault: 200000}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubeh}(h]h ]h"]h$]h&]uh1j hj3ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubh)}(hXtcp_rto_max_ms - INTEGER Maximal TCP retransmission timeout (in ms). Note that TCP_RTO_MAX_MS socket option has higher precedence. When changing tcp_rto_max_ms, it is important to understand that tcp_retries2 might need a change. Possible Values: 1000 - 120,000 Default: 120,000 h](h)}(htcp_rto_max_ms - INTEGERh]htcp_rto_max_ms - INTEGER}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj3ubj )}(hhh](j)}(hiMaximal TCP retransmission timeout (in ms). Note that TCP_RTO_MAX_MS socket option has higher precedence.h]hiMaximal TCP retransmission timeout (in ms). Note that TCP_RTO_MAX_MS socket option has higher precedence.}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hbWhen changing tcp_rto_max_ms, it is important to understand that tcp_retries2 might need a change.h]hbWhen changing tcp_rto_max_ms, it is important to understand that tcp_retries2 might need a change.}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hPossible Values: 1000 - 120,000h]hPossible Values: 1000 - 120,000}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubj)}(hDefault: 120,000h]hDefault: 120,000}(hj#4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj3ubeh}(h]h ]h"]h$]h&]uh1j hj3ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj.hhubeh}(h]h ]h"]h$]h&]uh1hhjhhhhhNubeh}(h] tcp-variablesah ]h"] tcp variablesah$]h&]uh1hhhhhhhhM]ubh)}(hhh](h)}(h UDP variablesh]h UDP variables}(hjN4hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjK4hhhhhMubh)}(hhh](h)}(hXiudp_l3mdev_accept - BOOLEAN Enabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hudp_l3mdev_accept - BOOLEANh]hudp_l3mdev_accept - BOOLEAN}(hjc4hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj_4ubj )}(hhh](j)}(hXEnabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.h]hX Enabling this option allows a “global” bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.}(hjt4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjq4ubj)}(hPossible values:h]hPossible values:}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjq4ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj4h]h 0 (disabled)}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubah}(h]h ]h"]h$]h&]uh1j?hj4ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubah}(h]h ]h"]h$]h&]uh1j?hj4ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjq4ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjq4ubeh}(h]h ]h"]h$]h&]uh1j hj_4ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4ubh)}(hXoudp_mem - vector of 3 INTEGERs: min, pressure, max Number of pages allowed for queueing by all UDP sockets. min: Number of pages allowed for queueing by all UDP sockets. pressure: This value was introduced to follow format of tcp_mem. max: This value was introduced to follow format of tcp_mem. Default is calculated at boot time from amount of available memory. h](h)}(h2udp_mem - vector of 3 INTEGERs: min, pressure, maxh]h2udp_mem - vector of 3 INTEGERs: min, pressure, max}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj4ubj )}(hhh](j)}(h8Number of pages allowed for queueing by all UDP sockets.h]h8Number of pages allowed for queueing by all UDP sockets.}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubj)}(h=min: Number of pages allowed for queueing by all UDP sockets.h]h=min: Number of pages allowed for queueing by all UDP sockets.}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubj)}(h@pressure: This value was introduced to follow format of tcp_mem.h]h@pressure: This value was introduced to follow format of tcp_mem.}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubj)}(h;max: This value was introduced to follow format of tcp_mem.h]h;max: This value was introduced to follow format of tcp_mem.}(hj!5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubj)}(hCDefault is calculated at boot time from amount of available memory.h]hCDefault is calculated at boot time from amount of available memory.}(hj/5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj4ubeh}(h]h ]h"]h$]h&]uh1j hj4ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4hhubh)}(hudp_rmem_min - INTEGER Minimal size of receive buffer used by UDP sockets in moderation. Each UDP socket is able to use the size for receiving data, even if total pages of UDP sockets exceed udp_mem pressure. The unit is byte. Default: 4K h](h)}(hudp_rmem_min - INTEGERh]hudp_rmem_min - INTEGER}(hjM5hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjI5ubj )}(hhh](j)}(hMinimal size of receive buffer used by UDP sockets in moderation. Each UDP socket is able to use the size for receiving data, even if total pages of UDP sockets exceed udp_mem pressure. The unit is byte.h]hMinimal size of receive buffer used by UDP sockets in moderation. Each UDP socket is able to use the size for receiving data, even if total pages of UDP sockets exceed udp_mem pressure. The unit is byte.}(hj^5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj[5ubj)}(h Default: 4Kh]h Default: 4K}(hjl5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj[5ubeh}(h]h ]h"]h$]h&]uh1j hjI5ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4hhubh)}(h^udp_wmem_min - INTEGER UDP does not have tx memory accounting and this tunable has no effect. h](h)}(hudp_wmem_min - INTEGERh]hudp_wmem_min - INTEGER}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj5ubj )}(hhh]j)}(hFUDP does not have tx memory accounting and this tunable has no effect.h]hFUDP does not have tx memory accounting and this tunable has no effect.}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj5ubah}(h]h ]h"]h$]h&]uh1j hj5ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4hhubh)}(hudp_hash_entries - INTEGER Show the number of hash buckets for UDP sockets in the current networking namespace. A negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace's one. h](h)}(hudp_hash_entries - INTEGERh]hudp_hash_entries - INTEGER}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj5ubj )}(hhh](j)}(hTShow the number of hash buckets for UDP sockets in the current networking namespace.h]hTShow the number of hash buckets for UDP sockets in the current networking namespace.}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj5ubj)}(hA negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace's one.h]hA negative value means the networking namespace does not own its hash buckets and shares the initial networking namespace’s one.}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj5ubeh}(h]h ]h"]h$]h&]uh1j hj5ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4hhubh)}(hXudp_child_hash_entries - INTEGER Control the number of hash buckets for UDP sockets in the child networking namespace, which must be set before clone() or unshare(). If the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace's hash buckets. Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process's NUMA policy, which could result in performance differences. Possible values: 0, 2^n (n: 7 (128) - 16 (64K)) Default: 0 h](h)}(h udp_child_hash_entries - INTEGERh]h udp_child_hash_entries - INTEGER}(hj5hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj5ubj )}(hhh](j)}(hControl the number of hash buckets for UDP sockets in the child networking namespace, which must be set before clone() or unshare().h]hControl the number of hash buckets for UDP sockets in the child networking namespace, which must be set before clone() or unshare().}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj)}(hIf the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace's hash buckets.h]hIf the value is not 0, the kernel uses a value rounded up to 2^n as the actual hash bucket size. 0 is a special value, meaning the child networking namespace will share the initial networking namespace’s hash buckets.}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj)}(hX3Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process's NUMA policy, which could result in performance differences.h]hX5Note that the child will use the global one in case the kernel fails to allocate enough memory. In addition, the global hash buckets are spread over available NUMA nodes, but the allocation of the child hash table depends on the current process’s NUMA policy, which could result in performance differences.}(hj#6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj)}(h/Possible values: 0, 2^n (n: 7 (128) - 16 (64K))h]h/Possible values: 0, 2^n (n: 7 (128) - 16 (64K))}(hj16hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj)}(h Default: 0h]h Default: 0}(hj?6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubeh}(h]h ]h"]h$]h&]uh1j hj5ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj\4hhubeh}(h]h ]h"]h$]h&]uh1hhjK4hhhhhNubeh}(h] udp-variablesah ]h"] udp variablesah$]h&]uh1hhhhhhhhMubh)}(hhh](h)}(h RAW variablesh]h RAW variables}(hjj6hhhNhNubah}(h]h ]h"]h$]h&]uh1hhjg6hhhhhMubh)}(hhh]h)}(hXhraw_l3mdev_accept - BOOLEAN Enabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(hraw_l3mdev_accept - BOOLEANh]hraw_l3mdev_accept - BOOLEAN}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj{6ubj )}(hhh](j)}(hXEnabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.h]hX Enabling this option allows a “global” bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj)}(hPossible values:h]hPossible values:}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj6h]h 0 (disabled)}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubah}(h]h ]h"]h$]h&]uh1j?hj6ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubah}(h]h ]h"]h$]h&]uh1j?hj6ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj6ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj6ubeh}(h]h ]h"]h$]h&]uh1j hj{6ubeh}(h]h ]h"]h$]h&]uh1hhhhMhjx6ubah}(h]h ]h"]h$]h&]uh1hhjg6hhhhhNubeh}(h] raw-variablesah ]h"] raw variablesah$]h&]uh1hhhhhhhhMubh)}(hhh](h)}(hCIPSOv4 Variablesh]hCIPSOv4 Variables}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj 7hhhhhMubh)}(hhh](h)}(hXcipso_cache_enable - BOOLEAN If enabled, enable additions to and lookups from the CIPSO label mapping cache. If disabled, additions are ignored and lookups always result in a miss. However, regardless of the setting the cache is still invalidated when required when means you can safely toggle this on and off and the cache will always be "safe". Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(hcipso_cache_enable - BOOLEANh]hcipso_cache_enable - BOOLEAN}(hj$7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj 7ubj )}(hhh](j)}(hX?If enabled, enable additions to and lookups from the CIPSO label mapping cache. If disabled, additions are ignored and lookups always result in a miss. However, regardless of the setting the cache is still invalidated when required when means you can safely toggle this on and off and the cache will always be "safe".h]hXCIf enabled, enable additions to and lookups from the CIPSO label mapping cache. If disabled, additions are ignored and lookups always result in a miss. However, regardless of the setting the cache is still invalidated when required when means you can safely toggle this on and off and the cache will always be “safe”.}(hj57hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj27ubj)}(hPossible values:h]hPossible values:}(hjC7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj27ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjV7h]h 0 (disabled)}(hjX7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjT7ubah}(h]h ]h"]h$]h&]uh1j?hjQ7ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjo7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjk7ubah}(h]h ]h"]h$]h&]uh1j?hjQ7ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj27ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj27ubeh}(h]h ]h"]h$]h&]uh1j hj 7ubeh}(h]h ]h"]h$]h&]uh1hhhhM hj7ubh)}(hXcipso_cache_bucket_size - INTEGER The CIPSO label cache consists of a fixed size hash table with each hash bucket containing a number of cache entries. This variable limits the number of entries in each hash bucket; the larger the value is, the more CIPSO label mappings that can be cached. When the number of entries in a given hash bucket reaches this limit adding new entries causes the oldest entry in the bucket to be removed to make room. Default: 10 h](h)}(h!cipso_cache_bucket_size - INTEGERh]h!cipso_cache_bucket_size - INTEGER}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj7ubj )}(hhh](j)}(hXThe CIPSO label cache consists of a fixed size hash table with each hash bucket containing a number of cache entries. This variable limits the number of entries in each hash bucket; the larger the value is, the more CIPSO label mappings that can be cached. When the number of entries in a given hash bucket reaches this limit adding new entries causes the oldest entry in the bucket to be removed to make room.h]hXThe CIPSO label cache consists of a fixed size hash table with each hash bucket containing a number of cache entries. This variable limits the number of entries in each hash bucket; the larger the value is, the more CIPSO label mappings that can be cached. When the number of entries in a given hash bucket reaches this limit adding new entries causes the oldest entry in the bucket to be removed to make room.}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj7ubj)}(h Default: 10h]h Default: 10}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj7ubeh}(h]h ]h"]h$]h&]uh1j hj7ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj7hhubh)}(hXlcipso_rbm_optfmt - BOOLEAN Enable the "Optimized Tag 1 Format" as defined in section 3.4.2.6 of the CIPSO draft specification (see Documentation/netlabel for details). This means that when set the CIPSO tag will be padded with empty categories in order to make the packet data 32-bit aligned. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hcipso_rbm_optfmt - BOOLEANh]hcipso_rbm_optfmt - BOOLEAN}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM#hj7ubj )}(hhh](j)}(hX Enable the "Optimized Tag 1 Format" as defined in section 3.4.2.6 of the CIPSO draft specification (see Documentation/netlabel for details). This means that when set the CIPSO tag will be padded with empty categories in order to make the packet data 32-bit aligned.h]hX Enable the “Optimized Tag 1 Format” as defined in section 3.4.2.6 of the CIPSO draft specification (see Documentation/netlabel for details). This means that when set the CIPSO tag will be padded with empty categories in order to make the packet data 32-bit aligned.}(hj7hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj7ubj)}(hPossible values:h]hPossible values:}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj7ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj8h]h 0 (disabled)}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj8ubah}(h]h ]h"]h$]h&]uh1j?hj8ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj/8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM!hj+8ubah}(h]h ]h"]h$]h&]uh1j?hj8ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj7ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjI8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM#hj7ubeh}(h]h ]h"]h$]h&]uh1j hj7ubeh}(h]h ]h"]h$]h&]uh1hhhhM#hj7hhubh)}(hXcipso_rbm_strictvalid - BOOLEAN If enabled, do a very strict check of the CIPSO option when ip_options_compile() is called. If disabled, relax the checks done during ip_options_compile(). Either way is "safe" as errors are caught else where in the CIPSO processing code but setting this to 0 (False) should result in less work (i.e. it should be faster) but could cause problems with other implementations that require strict checking. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hcipso_rbm_strictvalid - BOOLEANh]hcipso_rbm_strictvalid - BOOLEAN}(hjg8hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM2hjc8ubj )}(hhh](j)}(hXIf enabled, do a very strict check of the CIPSO option when ip_options_compile() is called. If disabled, relax the checks done during ip_options_compile(). Either way is "safe" as errors are caught else where in the CIPSO processing code but setting this to 0 (False) should result in less work (i.e. it should be faster) but could cause problems with other implementations that require strict checking.h]hXIf enabled, do a very strict check of the CIPSO option when ip_options_compile() is called. If disabled, relax the checks done during ip_options_compile(). Either way is “safe” as errors are caught else where in the CIPSO processing code but setting this to 0 (False) should result in less work (i.e. it should be faster) but could cause problems with other implementations that require strict checking.}(hjx8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM&hju8ubj)}(hPossible values:h]hPossible values:}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM-hju8ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj8h]h 0 (disabled)}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/hj8ubah}(h]h ]h"]h$]h&]uh1j?hj8ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM0hj8ubah}(h]h ]h"]h$]h&]uh1j?hj8ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM/hju8ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM2hju8ubeh}(h]h ]h"]h$]h&]uh1j hjc8ubeh}(h]h ]h"]h$]h&]uh1hhhhM2hj7hhubeh}(h]h ]h"]h$]h&]uh1hhj 7hhhhhNubeh}(h]cipsov4-variablesah ]h"]cipsov4 variablesah$]h&]uh1hhhhhhhhMubh)}(hhh](h)}(h IP Variablesh]h IP Variables}(hj8hhhNhNubah}(h]h ]h"]h$]h&]uh1hhj8hhhhhM5ubh)}(hhh](h)}(hXip_local_port_range - 2 INTEGERS Defines the local port range that is used by TCP and UDP to choose the local port. The first number is the first, the second the last local port number. If possible, it is better these numbers have different parity (one even and one odd value). Must be greater than or equal to ip_unprivileged_port_start. The default values are 32768 and 60999 respectively. h](h)}(h ip_local_port_range - 2 INTEGERSh]h ip_local_port_range - 2 INTEGERS}(hj 9hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM>hj9ubj )}(hhh]j)}(hXfDefines the local port range that is used by TCP and UDP to choose the local port. The first number is the first, the second the last local port number. If possible, it is better these numbers have different parity (one even and one odd value). Must be greater than or equal to ip_unprivileged_port_start. The default values are 32768 and 60999 respectively.h]hXfDefines the local port range that is used by TCP and UDP to choose the local port. The first number is the first, the second the last local port number. If possible, it is better these numbers have different parity (one even and one odd value). Must be greater than or equal to ip_unprivileged_port_start. The default values are 32768 and 60999 respectively.}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM8hj9ubah}(h]h ]h"]h$]h&]uh1j hj9ubeh}(h]h ]h"]h$]h&]uh1hhhhM>hj9ubh)}(hXip_local_reserved_ports - list of comma separated ranges Specify the ports which are reserved for known third-party applications. These ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged. The format used for both input and output is a comma separated list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and 10). Writing to the file will clear all previously reserved ports and update the current list with the one given in the input. Note that ip_local_port_range and ip_local_reserved_ports settings are independent and both are considered by the kernel when determining which ports are available for automatic port assignments. You can reserve ports which are not in the current ip_local_port_range, e.g.:: $ cat /proc/sys/net/ipv4/ip_local_port_range 32000 60999 $ cat /proc/sys/net/ipv4/ip_local_reserved_ports 8080,9148 although this is redundant. However such a setting is useful if later the port range is changed to a value that will include the reserved ports. Also keep in mind, that overlapping of these ranges may affect probability of selecting ephemeral ports which are right after block of reserved ports. Default: Empty h](h)}(h8ip_local_reserved_ports - list of comma separated rangesh]h8ip_local_reserved_ports - list of comma separated ranges}(hj;9hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM_hj79ubj )}(hhh](j)}(hSpecify the ports which are reserved for known third-party applications. These ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged.h]hSpecify the ports which are reserved for known third-party applications. These ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged.}(hjL9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMAhjI9ubj)}(hThe format used for both input and output is a comma separated list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and 10). Writing to the file will clear all previously reserved ports and update the current list with the one given in the input.h]hThe format used for both input and output is a comma separated list of ranges (e.g. “1,2-4,10-10” for ports 1, 2, 3, 4 and 10). Writing to the file will clear all previously reserved ports and update the current list with the one given in the input.}(hjZ9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMFhjI9ubj)}(hNote that ip_local_port_range and ip_local_reserved_ports settings are independent and both are considered by the kernel when determining which ports are available for automatic port assignments.h]hNote that ip_local_port_range and ip_local_reserved_ports settings are independent and both are considered by the kernel when determining which ports are available for automatic port assignments.}(hjh9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMLhjI9ubj)}(hNYou can reserve ports which are not in the current ip_local_port_range, e.g.::h]hMYou can reserve ports which are not in the current ip_local_port_range, e.g.:}(hjv9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQhjI9ubh literal_block)}(hy$ cat /proc/sys/net/ipv4/ip_local_port_range 32000 60999 $ cat /proc/sys/net/ipv4/ip_local_reserved_ports 8080,9148h]hy$ cat /proc/sys/net/ipv4/ip_local_port_range 32000 60999 $ cat /proc/sys/net/ipv4/ip_local_reserved_ports 8080,9148}hj9sbah}(h]h ]h"]h$]h&]hhuh1j9hhhMThjI9ubj)}(hX'although this is redundant. However such a setting is useful if later the port range is changed to a value that will include the reserved ports. Also keep in mind, that overlapping of these ranges may affect probability of selecting ephemeral ports which are right after block of reserved ports.h]hX'although this is redundant. However such a setting is useful if later the port range is changed to a value that will include the reserved ports. Also keep in mind, that overlapping of these ranges may affect probability of selecting ephemeral ports which are right after block of reserved ports.}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMYhjI9ubj)}(hDefault: Emptyh]hDefault: Empty}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM_hjI9ubeh}(h]h ]h"]h$]h&]uh1j hj79ubeh}(h]h ]h"]h$]h&]uh1hhhhM_hj9hhubh)}(hX2ip_local_port_step_width - INTEGER Defines the numerical maximum increment between successive port allocations within the ephemeral port range when an unavailable port is reached. This can be used to mitigate accumulated nodes in port distribution when reserved ports have been configured. Please note that port collisions may be more frequent in a system with a very high load. It is recommended to set this value strictly larger than the largest contiguous block of ports configure in ip_local_reserved_ports. For large reserved port ranges, setting this to 3x or 4x the size of the largest block is advised. Using a value equal or greater than the local port range size completely solves the uneven port distribution problem, but it can degrade performance under port exhaustion situations. Default: 0 (disabled) h](h)}(h"ip_local_port_step_width - INTEGERh]h"ip_local_port_step_width - INTEGER}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMohj9ubj )}(hhh](j)}(hXWDefines the numerical maximum increment between successive port allocations within the ephemeral port range when an unavailable port is reached. This can be used to mitigate accumulated nodes in port distribution when reserved ports have been configured. Please note that port collisions may be more frequent in a system with a very high load.h]hXWDefines the numerical maximum increment between successive port allocations within the ephemeral port range when an unavailable port is reached. This can be used to mitigate accumulated nodes in port distribution when reserved ports have been configured. Please note that port collisions may be more frequent in a system with a very high load.}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMbhj9ubj)}(hXIt is recommended to set this value strictly larger than the largest contiguous block of ports configure in ip_local_reserved_ports. For large reserved port ranges, setting this to 3x or 4x the size of the largest block is advised. Using a value equal or greater than the local port range size completely solves the uneven port distribution problem, but it can degrade performance under port exhaustion situations.h]hXIt is recommended to set this value strictly larger than the largest contiguous block of ports configure in ip_local_reserved_ports. For large reserved port ranges, setting this to 3x or 4x the size of the largest block is advised. Using a value equal or greater than the local port range size completely solves the uneven port distribution problem, but it can degrade performance under port exhaustion situations.}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhhj9ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj9hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMohj9ubeh}(h]h ]h"]h$]h&]uh1j hj9ubeh}(h]h ]h"]h$]h&]uh1hhhhMohj9hhubh)}(hXLip_unprivileged_port_start - INTEGER This is a per-namespace sysctl. It defines the first unprivileged port in the network namespace. Privileged ports require root or CAP_NET_BIND_SERVICE in order to bind to them. To disable all privileged ports, set this to 0. They must not overlap with the ip_local_port_range. Default: 1024 h](h)}(h$ip_unprivileged_port_start - INTEGERh]h$ip_unprivileged_port_start - INTEGER}(hj :hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMxhj:ubj )}(hhh](j)}(hXThis is a per-namespace sysctl. It defines the first unprivileged port in the network namespace. Privileged ports require root or CAP_NET_BIND_SERVICE in order to bind to them. To disable all privileged ports, set this to 0. They must not overlap with the ip_local_port_range.h]hXThis is a per-namespace sysctl. It defines the first unprivileged port in the network namespace. Privileged ports require root or CAP_NET_BIND_SERVICE in order to bind to them. To disable all privileged ports, set this to 0. They must not overlap with the ip_local_port_range.}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMrhj:ubj)}(h Default: 1024h]h Default: 1024}(hj*:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMxhj:ubeh}(h]h ]h"]h$]h&]uh1j hj:ubeh}(h]h ]h"]h$]h&]uh1hhhhMxhj9hhubh)}(hip_nonlocal_bind - BOOLEAN If enabled, allows processes to bind() to non-local IP addresses, which can be quite useful - but may break some applications. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hip_nonlocal_bind - BOOLEANh]hip_nonlocal_bind - BOOLEAN}(hjH:hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjD:ubj )}(hhh](j)}(h~If enabled, allows processes to bind() to non-local IP addresses, which can be quite useful - but may break some applications.h]h~If enabled, allows processes to bind() to non-local IP addresses, which can be quite useful - but may break some applications.}(hjY:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM{hjV:ubj)}(hPossible values:h]hPossible values:}(hjg:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM~hjV:ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjz:h]h 0 (disabled)}(hj|:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjx:ubah}(h]h ]h"]h$]h&]uh1j?hju:ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj:ubah}(h]h ]h"]h$]h&]uh1j?hju:ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjV:ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjV:ubeh}(h]h ]h"]h$]h&]uh1j hjD:ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXip_autobind_reuse - BOOLEAN By default, bind() does not select the ports automatically even if the new socket and all sockets bound to the port have SO_REUSEADDR. ip_autobind_reuse allows bind() to reuse the port and this is useful when you use bind()+connect(), but may break some applications. The preferred solution is to use IP_BIND_ADDRESS_NO_PORT and this option should only be set by experts. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hip_autobind_reuse - BOOLEANh]hip_autobind_reuse - BOOLEAN}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj:ubj )}(hhh](j)}(hXsBy default, bind() does not select the ports automatically even if the new socket and all sockets bound to the port have SO_REUSEADDR. ip_autobind_reuse allows bind() to reuse the port and this is useful when you use bind()+connect(), but may break some applications. The preferred solution is to use IP_BIND_ADDRESS_NO_PORT and this option should only be set by experts.h]hXsBy default, bind() does not select the ports automatically even if the new socket and all sockets bound to the port have SO_REUSEADDR. ip_autobind_reuse allows bind() to reuse the port and this is useful when you use bind()+connect(), but may break some applications. The preferred solution is to use IP_BIND_ADDRESS_NO_PORT and this option should only be set by experts.}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj:ubj)}(hPossible values:h]hPossible values:}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj:ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj:h]h 0 (disabled)}(hj:hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj:ubah}(h]h ]h"]h$]h&]uh1j?hj:ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubah}(h]h ]h"]h$]h&]uh1j?hj:ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj:ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj0;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj:ubeh}(h]h ]h"]h$]h&]uh1j hj:ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hip_dynaddr - INTEGER If set non-zero, enables support for dynamic addresses. If set to a non-zero value larger than 1, a kernel log message will be printed when dynamic address rewriting occurs. Default: 0 h](h)}(hip_dynaddr - INTEGERh]hip_dynaddr - INTEGER}(hjN;hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjJ;ubj )}(hhh](j)}(hIf set non-zero, enables support for dynamic addresses. If set to a non-zero value larger than 1, a kernel log message will be printed when dynamic address rewriting occurs.h]hIf set non-zero, enables support for dynamic addresses. If set to a non-zero value larger than 1, a kernel log message will be printed when dynamic address rewriting occurs.}(hj_;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj\;ubj)}(h Default: 0h]h Default: 0}(hjm;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj\;ubeh}(h]h ]h"]h$]h&]uh1j hjJ;ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXip_early_demux - BOOLEAN Optimize input packet processing down to one demux for certain kinds of local sockets. Currently we only do this for established TCP and connected UDP sockets. It may add an additional cost for pure routing workloads that reduces overall throughput, in such case you should disable it. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(hip_early_demux - BOOLEANh]hip_early_demux - BOOLEAN}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj;ubj )}(hhh](j)}(hOptimize input packet processing down to one demux for certain kinds of local sockets. Currently we only do this for established TCP and connected UDP sockets.h]hOptimize input packet processing down to one demux for certain kinds of local sockets. Currently we only do this for established TCP and connected UDP sockets.}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubj)}(h}It may add an additional cost for pure routing workloads that reduces overall throughput, in such case you should disable it.h]h}It may add an additional cost for pure routing workloads that reduces overall throughput, in such case you should disable it.}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubj)}(hPossible values:h]hPossible values:}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj;h]h 0 (disabled)}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubah}(h]h ]h"]h$]h&]uh1j?hj;ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubah}(h]h ]h"]h$]h&]uh1j?hj;ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj;ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj;ubeh}(h]h ]h"]h$]h&]uh1j hj;ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXiping_group_range - 2 INTEGERS Restrict ICMP_PROTO datagram sockets to users in the group range. The default is "1 0", meaning, that nobody (not even root) may create ping sockets. Setting it to "100 100" would grant permissions to the single group. "0 4294967294" would enable it for the world, "100 4294967294" would enable it for the users, but not daemons. h](h)}(hping_group_range - 2 INTEGERSh]hping_group_range - 2 INTEGERS}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj<ubj )}(hhh]j)}(hXJRestrict ICMP_PROTO datagram sockets to users in the group range. The default is "1 0", meaning, that nobody (not even root) may create ping sockets. Setting it to "100 100" would grant permissions to the single group. "0 4294967294" would enable it for the world, "100 4294967294" would enable it for the users, but not daemons.h]hXZRestrict ICMP_PROTO datagram sockets to users in the group range. The default is “1 0”, meaning, that nobody (not even root) may create ping sockets. Setting it to “100 100” would grant permissions to the single group. “0 4294967294” would enable it for the world, “100 4294967294” would enable it for the users, but not daemons.}(hj-<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj*<ubah}(h]h ]h"]h$]h&]uh1j hj<ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(htcp_early_demux - BOOLEAN Enable early demux for established TCP sockets. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(htcp_early_demux - BOOLEANh]htcp_early_demux - BOOLEAN}(hjK<hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjG<ubj )}(hhh](j)}(h/Enable early demux for established TCP sockets.h]h/Enable early demux for established TCP sockets.}(hj\<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjY<ubj)}(hPossible values:h]hPossible values:}(hjj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjY<ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj}<h]h 0 (disabled)}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj{<ubah}(h]h ]h"]h$]h&]uh1j?hjx<ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubah}(h]h ]h"]h$]h&]uh1j?hjx<ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjY<ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjY<ubeh}(h]h ]h"]h$]h&]uh1j hjG<ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hudp_early_demux - BOOLEAN Enable early demux for connected UDP sockets. Disable this if your system could experience more unconnected load. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(hudp_early_demux - BOOLEANh]hudp_early_demux - BOOLEAN}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj<ubj )}(hhh](j)}(hqEnable early demux for connected UDP sockets. Disable this if your system could experience more unconnected load.h]hqEnable early demux for connected UDP sockets. Disable this if your system could experience more unconnected load.}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubj)}(hPossible values:h]hPossible values:}(hj<hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj=h]h 0 (disabled)}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubah}(h]h ]h"]h$]h&]uh1j?hj<ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubah}(h]h ]h"]h$]h&]uh1j?hj<ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj<ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj3=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj<ubeh}(h]h ]h"]h$]h&]uh1j hj<ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hicmp_echo_ignore_all - BOOLEAN If enabled, then the kernel will ignore all ICMP ECHO requests sent to it. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hicmp_echo_ignore_all - BOOLEANh]hicmp_echo_ignore_all - BOOLEAN}(hjQ=hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjM=ubj )}(hhh](j)}(hJIf enabled, then the kernel will ignore all ICMP ECHO requests sent to it.h]hJIf enabled, then the kernel will ignore all ICMP ECHO requests sent to it.}(hjb=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj_=ubj)}(hPossible values:h]hPossible values:}(hjp=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj_=ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj=h]h 0 (disabled)}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubah}(h]h ]h"]h$]h&]uh1j?hj~=ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubah}(h]h ]h"]h$]h&]uh1j?hj~=ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj_=ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj_=ubeh}(h]h ]h"]h$]h&]uh1j hjM=ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hicmp_echo_enable_probe - BOOLEAN If enabled, then the kernel will respond to RFC 8335 PROBE requests sent to it. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h icmp_echo_enable_probe - BOOLEANh]h icmp_echo_enable_probe - BOOLEAN}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj=ubj )}(hhh](j)}(hOIf enabled, then the kernel will respond to RFC 8335 PROBE requests sent to it.h]hOIf enabled, then the kernel will respond to RFC 8335 PROBE requests sent to it.}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubj)}(hPossible values:h]hPossible values:}(hj=hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj>h]h 0 (disabled)}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubah}(h]h ]h"]h$]h&]uh1j?hj>ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubah}(h]h ]h"]h$]h&]uh1j?hj>ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj=ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj9>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj=ubeh}(h]h ]h"]h$]h&]uh1j hj=ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hicmp_echo_ignore_broadcasts - BOOLEAN If enabled, then the kernel will ignore all ICMP ECHO and TIMESTAMP requests sent to it via broadcast/multicast. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(h%icmp_echo_ignore_broadcasts - BOOLEANh]h%icmp_echo_ignore_broadcasts - BOOLEAN}(hjW>hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjS>ubj )}(hhh](j)}(hpIf enabled, then the kernel will ignore all ICMP ECHO and TIMESTAMP requests sent to it via broadcast/multicast.h]hpIf enabled, then the kernel will ignore all ICMP ECHO and TIMESTAMP requests sent to it via broadcast/multicast.}(hjh>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhje>ubj)}(hPossible values:h]hPossible values:}(hjv>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhje>ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj>h]h 0 (disabled)}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubah}(h]h ]h"]h$]h&]uh1j?hj>ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubah}(h]h ]h"]h$]h&]uh1j?hj>ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhje>ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhje>ubeh}(h]h ]h"]h$]h&]uh1j hjS>ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXXicmp_ratelimit - INTEGER Limit the maximal rates for sending ICMP packets whose type matches icmp_ratemask (see below) to specific targets. 0 to disable any limiting, otherwise the minimal space between responses in milliseconds. Note that another sysctl, icmp_msgs_per_sec limits the number of ICMP packets sent on all targets. Default: 1000 h](h)}(hicmp_ratelimit - INTEGERh]hicmp_ratelimit - INTEGER}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj>ubj )}(hhh](j)}(hX/Limit the maximal rates for sending ICMP packets whose type matches icmp_ratemask (see below) to specific targets. 0 to disable any limiting, otherwise the minimal space between responses in milliseconds. Note that another sysctl, icmp_msgs_per_sec limits the number of ICMP packets sent on all targets.h]hX/Limit the maximal rates for sending ICMP packets whose type matches icmp_ratemask (see below) to specific targets. 0 to disable any limiting, otherwise the minimal space between responses in milliseconds. Note that another sysctl, icmp_msgs_per_sec limits the number of ICMP packets sent on all targets.}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubj)}(h Default: 1000h]h Default: 1000}(hj>hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj>ubeh}(h]h ]h"]h$]h&]uh1j hj>ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXicmp_msgs_per_sec - INTEGER Limit maximal number of ICMP packets sent per second from this host. Only messages whose type matches icmp_ratemask (see below) are controlled by this limit. For security reasons, the precise count of messages per second is randomized. Default: 10000 h](h)}(hicmp_msgs_per_sec - INTEGERh]hicmp_msgs_per_sec - INTEGER}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj?ubj )}(hhh](j)}(hLimit maximal number of ICMP packets sent per second from this host. Only messages whose type matches icmp_ratemask (see below) are controlled by this limit. For security reasons, the precise count of messages per second is randomized.h]hLimit maximal number of ICMP packets sent per second from this host. Only messages whose type matches icmp_ratemask (see below) are controlled by this limit. For security reasons, the precise count of messages per second is randomized.}(hj(?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%?ubj)}(hDefault: 10000h]hDefault: 10000}(hj6?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj%?ubeh}(h]h ]h"]h$]h&]uh1j hj?ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hicmp_msgs_burst - INTEGER icmp_msgs_per_sec controls number of ICMP packets sent per second, while icmp_msgs_burst controls the token bucket size. For security reasons, the precise burst size is randomized. Default: 10000 h](h)}(hicmp_msgs_burst - INTEGERh]hicmp_msgs_burst - INTEGER}(hjT?hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjP?ubj )}(hhh](j)}(hicmp_msgs_per_sec controls number of ICMP packets sent per second, while icmp_msgs_burst controls the token bucket size. For security reasons, the precise burst size is randomized.h]hicmp_msgs_per_sec controls number of ICMP packets sent per second, while icmp_msgs_burst controls the token bucket size. For security reasons, the precise burst size is randomized.}(hje?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjb?ubj)}(hDefault: 10000h]hDefault: 10000}(hjs?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjb?ubeh}(h]h ]h"]h$]h&]uh1j hjP?ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXicmp_ratemask - INTEGER Mask made of ICMP types for which rates are being limited. Significant bits: IHGFEDCBA9876543210 Default mask: 0000001100000011000 (6168) Bit definitions (see include/linux/icmp.h): = ========================= 0 Echo Reply 3 Destination Unreachable [1]_ 4 Source Quench [1]_ 5 Redirect 8 Echo Request B Time Exceeded [1]_ C Parameter Problem [1]_ D Timestamp Request E Timestamp Reply F Info Request G Info Reply H Address Mask Request I Address Mask Reply = ========================= .. [1] These are rate limited by default (see default mask above) h](h)}(hicmp_ratemask - INTEGERh]hicmp_ratemask - INTEGER}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj?ubj )}(hhh](j)}(h:Mask made of ICMP types for which rates are being limited.h]h:Mask made of ICMP types for which rates are being limited.}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj?ubj)}(h%Significant bits: IHGFEDCBA9876543210h]h%Significant bits: IHGFEDCBA9876543210}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj?ubj)}(h,Default mask: 0000001100000011000 (6168)h]h,Default mask: 0000001100000011000 (6168)}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj?ubj)}(h+Bit definitions (see include/linux/icmp.h):h]h+Bit definitions (see include/linux/icmp.h):}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj?ubj )}(hX/= ========================= 0 Echo Reply 3 Destination Unreachable [1]_ 4 Source Quench [1]_ 5 Redirect 8 Echo Request B Time Exceeded [1]_ C Parameter Problem [1]_ D Timestamp Request E Timestamp Reply F Info Request G Info Reply H Address Mask Request I Address Mask Reply = ========================= h]j)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhj?ubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhj?ubj)}(hhh](j)}(hhh](j)}(hhh]j)}(hjh]h0}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj?ubah}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh]j)}(h Echo Replyh]h Echo Reply}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj@ubah}(h]h ]h"]h$]h&]uh1jhj?ubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hjh]h3}(hj7@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj4@ubah}(h]h ]h"]h$]h&]uh1jhj1@ubj)}(hhh]j)}(hDestination Unreachable [1]_h](hDestination Unreachable }(hjM@hhhNhNubhfootnote_reference)}(h[1]_h]h1}(hjW@hhhNhNubah}(h]id1ah ]h"]h$]h&]refidid5docnamenetworking/ip-sysctluh1jU@hjM@resolvedKubeh}(h]h ]h"]h$]h&]uh1jhhhM hjJ@ubah}(h]h ]h"]h$]h&]uh1jhj1@ubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hj h]h4}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj@ubah}(h]h ]h"]h$]h&]uh1jhj}@ubj)}(hhh]j)}(hSource Quench [1]_h](hSource Quench }(hj@hhhNhNubjV@)}(h[1]_h]h1}(hj@hhhNhNubah}(h]id2ah ]h"]h$]h&]jf@jg@jh@ji@uh1jU@hj@jj@Kubeh}(h]h ]h"]h$]h&]uh1jhhhM hj@ubah}(h]h ]h"]h$]h&]uh1jhj}@ubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hjWh]h5}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@ubah}(h]h ]h"]h$]h&]uh1jhj@ubj)}(hhh]j)}(hRedirecth]hRedirect}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@ubah}(h]h ]h"]h$]h&]uh1jhj@ubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(h8h]h8}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@ubah}(h]h ]h"]h$]h&]uh1jhj@ubj)}(hhh]j)}(h Echo Requesth]h Echo Request}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjAubah}(h]h ]h"]h$]h&]uh1jhj@ubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hBh]hB}(hj5AhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj2Aubah}(h]h ]h"]h$]h&]uh1jhj/Aubj)}(hhh]j)}(hTime Exceeded [1]_h](hTime Exceeded }(hjLAhhhNhNubjV@)}(h[1]_h]h1}(hjTAhhhNhNubah}(h]id3ah ]h"]h$]h&]jf@jg@jh@ji@uh1jU@hjLAjj@Kubeh}(h]h ]h"]h$]h&]uh1jhhhMhjIAubah}(h]h ]h"]h$]h&]uh1jhj/Aubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hCh]hC}(hj{AhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjxAubah}(h]h ]h"]h$]h&]uh1jhjuAubj)}(hhh]j)}(hParameter Problem [1]_h](hParameter Problem }(hjAhhhNhNubjV@)}(h[1]_h]h1}(hjAhhhNhNubah}(h]id4ah ]h"]h$]h&]jf@jg@jh@ji@uh1jU@hjAjj@Kubeh}(h]h ]h"]h$]h&]uh1jhhhMhjAubah}(h]h ]h"]h$]h&]uh1jhjuAubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hDh]hD}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjAubah}(h]h ]h"]h$]h&]uh1jhjAubj)}(hhh]j)}(hTimestamp Requesth]hTimestamp Request}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjAubah}(h]h ]h"]h$]h&]uh1jhjAubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hEh]hE}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjAubah}(h]h ]h"]h$]h&]uh1jhjAubj)}(hhh]j)}(hTimestamp Replyh]hTimestamp Reply}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj Bubah}(h]h ]h"]h$]h&]uh1jhjAubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hFh]hF}(hj/BhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj,Bubah}(h]h ]h"]h$]h&]uh1jhj)Bubj)}(hhh]j)}(h Info Requesth]h Info Request}(hjFBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjCBubah}(h]h ]h"]h$]h&]uh1jhj)Bubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hGh]hG}(hjfBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjcBubah}(h]h ]h"]h$]h&]uh1jhj`Bubj)}(hhh]j)}(h Info Replyh]h Info Reply}(hj}BhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjzBubah}(h]h ]h"]h$]h&]uh1jhj`Bubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hHh]hH}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjBubah}(h]h ]h"]h$]h&]uh1jhjBubj)}(hhh]j)}(hAddress Mask Requesth]hAddress Mask Request}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjBubah}(h]h ]h"]h$]h&]uh1jhjBubeh}(h]h ]h"]h$]h&]uh1jhj?ubj)}(hhh](j)}(hhh]j)}(hIh]hI}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjBubah}(h]h ]h"]h$]h&]uh1jhjBubj)}(hhh]j)}(hAddress Mask Replyh]hAddress Mask Reply}(hjBhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjBubah}(h]h ]h"]h$]h&]uh1jhjBubeh}(h]h ]h"]h$]h&]uh1jhj?ubeh}(h]h ]h"]h$]h&]uh1jhj?ubeh}(h]h ]h"]h$]h&]colsKuh1jhj?ubah}(h]h ]h"]h$]h&]uh1jhj?ubah}(h]h ]h"]h$]h&]uh1j hhhM hj?ubhfootnote)}(h;These are rate limited by default (see default mask above) h](hlabel)}(h1h]h1}(hj&ChhhNhNubah}(h]h ]h"]h$]h&]uh1j$Chj Cubj)}(h:These are rate limited by default (see default mask above)h]h:These are rate limited by default (see default mask above)}(hj4ChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj Cubeh}(h]jg@ah ]h"]1ah$]h&](ja@j@j^AjAejh@ji@uh1jChhhMhj?jj@Kubeh}(h]h ]h"]h$]h&]uh1j hj?ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj9hhubh)}(hXQicmp_ignore_bogus_error_responses - BOOLEAN Some routers violate RFC1122 by sending bogus responses to broadcast frames. Such violations are normally logged via a kernel warning. If enabled, the kernel will not give such warnings, which will avoid log file clutter. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(h+icmp_ignore_bogus_error_responses - BOOLEANh]h+icmp_ignore_bogus_error_responses - BOOLEAN}(hjYChhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM'hjUCubj )}(hhh](j)}(hSome routers violate RFC1122 by sending bogus responses to broadcast frames. Such violations are normally logged via a kernel warning. If enabled, the kernel will not give such warnings, which will avoid log file clutter.h]hSome routers violate RFC1122 by sending bogus responses to broadcast frames. Such violations are normally logged via a kernel warning. If enabled, the kernel will not give such warnings, which will avoid log file clutter.}(hjjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjgCubj)}(hPossible values:h]hPossible values:}(hjxChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM"hjgCubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjCh]h 0 (disabled)}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$hjCubah}(h]h ]h"]h$]h&]uh1j?hjCubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM%hjCubah}(h]h ]h"]h$]h&]uh1j?hjCubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM$hjgCubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM'hjgCubeh}(h]h ]h"]h$]h&]uh1j hjUCubeh}(h]h ]h"]h$]h&]uh1hhhhM'hj9hhubeh}(h]h ]h"]h$]h&]uh1hhj8hhhhhNubj)}(h(icmp_errors_use_inbound_ifaddr - BOOLEANh]h(icmp_errors_use_inbound_ifaddr - BOOLEAN}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM)hj8hhubj )}(hXpIf disabled, icmp error messages are sent with the primary address of the exiting interface. If enabled, the message will be sent with the primary address of the interface that received the packet that caused the icmp error. This is the behaviour many network administrators will expect from a router. And it can make debugging complicated network layouts much easier. Note that if no primary address exists for the interface selected, then the primary address of the first non-loopback interface that has one will be used regardless of this setting. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](j)}(h\If disabled, icmp error messages are sent with the primary address of the exiting interface.h]h\If disabled, icmp error messages are sent with the primary address of the exiting interface.}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM+hjCubj)}(hXIf enabled, the message will be sent with the primary address of the interface that received the packet that caused the icmp error. This is the behaviour many network administrators will expect from a router. And it can make debugging complicated network layouts much easier.h]hXIf enabled, the message will be sent with the primary address of the interface that received the packet that caused the icmp error. This is the behaviour many network administrators will expect from a router. And it can make debugging complicated network layouts much easier.}(hjChhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM.hjCubj)}(hNote that if no primary address exists for the interface selected, then the primary address of the first non-loopback interface that has one will be used regardless of this setting.h]hNote that if no primary address exists for the interface selected, then the primary address of the first non-loopback interface that has one will be used regardless of this setting.}(hj DhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4hjCubj)}(hPossible values:h]hPossible values:}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM8hjCubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj-Dh]h 0 (disabled)}(hj/DhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM:hj+Dubah}(h]h ]h"]h$]h&]uh1j?hj(Dubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjFDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM;hjBDubah}(h]h ]h"]h$]h&]uh1j?hj(Dubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM:hjCubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj`DhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM=hjCubeh}(h]h ]h"]h$]h&]uh1j hhhM+hj8hhubh)}(hhh](h)}(hXicmp_errors_extension_mask - UNSIGNED INTEGER Bitmask of ICMP extensions to append to ICMPv4 error messages ("Destination Unreachable", "Time Exceeded" and "Parameter Problem"). The original datagram is trimmed / padded to 128 bytes in order to be compatible with applications that do not comply with RFC 4884. Possible extensions are: ==== ============================================================== 0x01 Incoming IP interface information according to RFC 5837. Extension will include the index, IPv4 address (if present), name and MTU of the IP interface that received the datagram which elicited the ICMP error. ==== ============================================================== Default: 0x00 (no extensions) h](h)}(h-icmp_errors_extension_mask - UNSIGNED INTEGERh]h-icmp_errors_extension_mask - UNSIGNED INTEGER}(hj{DhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMNhjwDubj )}(hhh](j)}(hXBitmask of ICMP extensions to append to ICMPv4 error messages ("Destination Unreachable", "Time Exceeded" and "Parameter Problem"). The original datagram is trimmed / padded to 128 bytes in order to be compatible with applications that do not comply with RFC 4884.h]hXBitmask of ICMP extensions to append to ICMPv4 error messages (“Destination Unreachable”, “Time Exceeded” and “Parameter Problem”). The original datagram is trimmed / padded to 128 bytes in order to be compatible with applications that do not comply with RFC 4884.}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM@hjDubj)}(hPossible extensions are:h]hPossible extensions are:}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMEhjDubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjDubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthK>uh1jhjDubj)}(hhh]j)}(hhh](j)}(hhh]j)}(h0x01h]h0x01}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMHhjDubah}(h]h ]h"]h$]h&]uh1jhjDubj)}(hhh]j)}(hIncoming IP interface information according to RFC 5837. Extension will include the index, IPv4 address (if present), name and MTU of the IP interface that received the datagram which elicited the ICMP error.h]hIncoming IP interface information according to RFC 5837. Extension will include the index, IPv4 address (if present), name and MTU of the IP interface that received the datagram which elicited the ICMP error.}(hjDhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMHhjDubah}(h]h ]h"]h$]h&]uh1jhjDubeh}(h]h ]h"]h$]h&]uh1jhjDubah}(h]h ]h"]h$]h&]uh1jhjDubeh}(h]h ]h"]h$]h&]colsKuh1jhjDubah}(h]h ]h"]h$]h&]uh1jhjDubj)}(hDefault: 0x00 (no extensions)h]hDefault: 0x00 (no extensions)}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMNhjDubeh}(h]h ]h"]h$]h&]uh1j hjwDubeh}(h]h ]h"]h$]h&]uh1hhhhMNhjtDubh)}(hXigmp_max_memberships - INTEGER Change the maximum number of multicast groups we can subscribe to. Default: 20 Theoretical maximum value is bounded by having to send a membership report in a single datagram (i.e. the report can't span multiple datagrams, or risk confusing the switch and leaving groups you don't intend to). The number of supported groups 'M' is bounded by the number of group report entries you can fit into a single datagram of 65535 bytes. M = 65536-sizeof (ip header)/(sizeof(Group record)) Group records are variable length, with a minimum of 12 bytes. So net.ipv4.igmp_max_memberships should not be set higher than: (65536-24) / 12 = 5459 The value 5459 assumes no IP header options, so in practice this number may be lower. h](h)}(higmp_max_memberships - INTEGERh]higmp_max_memberships - INTEGER}(hj-EhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMdhj)Eubj )}(hhh](j)}(hNChange the maximum number of multicast groups we can subscribe to. Default: 20h]hNChange the maximum number of multicast groups we can subscribe to. Default: 20}(hj>EhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQhj;Eubj)}(hTheoretical maximum value is bounded by having to send a membership report in a single datagram (i.e. the report can't span multiple datagrams, or risk confusing the switch and leaving groups you don't intend to).h]hTheoretical maximum value is bounded by having to send a membership report in a single datagram (i.e. the report can’t span multiple datagrams, or risk confusing the switch and leaving groups you don’t intend to).}(hjLEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMThj;Eubj)}(hThe number of supported groups 'M' is bounded by the number of group report entries you can fit into a single datagram of 65535 bytes.h]hThe number of supported groups ‘M’ is bounded by the number of group report entries you can fit into a single datagram of 65535 bytes.}(hjZEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMYhj;Eubj)}(h3M = 65536-sizeof (ip header)/(sizeof(Group record))h]h3M = 65536-sizeof (ip header)/(sizeof(Group record))}(hjhEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM\hj;Eubj)}(h~Group records are variable length, with a minimum of 12 bytes. So net.ipv4.igmp_max_memberships should not be set higher than:h]h~Group records are variable length, with a minimum of 12 bytes. So net.ipv4.igmp_max_memberships should not be set higher than:}(hjvEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM^hj;Eubj)}(h(65536-24) / 12 = 5459h]h(65536-24) / 12 = 5459}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMahj;Eubj)}(hUThe value 5459 assumes no IP header options, so in practice this number may be lower.h]hUThe value 5459 assumes no IP header options, so in practice this number may be lower.}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMchj;Eubeh}(h]h ]h"]h$]h&]uh1j hj)Eubeh}(h]h ]h"]h$]h&]uh1hhhhMdhjtDhhubh)}(hyigmp_max_msf - INTEGER Maximum number of addresses allowed in the source filter list for a multicast group. Default: 10 h](h)}(higmp_max_msf - INTEGERh]higmp_max_msf - INTEGER}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMjhjEubj )}(hhh](j)}(hTMaximum number of addresses allowed in the source filter list for a multicast group.h]hTMaximum number of addresses allowed in the source filter list for a multicast group.}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMghjEubj)}(h Default: 10h]h Default: 10}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMjhjEubeh}(h]h ]h"]h$]h&]uh1j hjEubeh}(h]h ]h"]h$]h&]uh1hhhhMjhjtDhhubh)}(higmp_qrv - INTEGER Controls the IGMP query robustness variable (see RFC2236 8.1). Default: 2 (as specified by RFC2236 8.1) Minimum: 1 (as specified by RFC6636 4.5) h](h)}(higmp_qrv - INTEGERh]higmp_qrv - INTEGER}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMqhjEubj )}(hhh](j)}(h>Controls the IGMP query robustness variable (see RFC2236 8.1).h]h>Controls the IGMP query robustness variable (see RFC2236 8.1).}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMmhjEubj)}(h(Default: 2 (as specified by RFC2236 8.1)h]h(Default: 2 (as specified by RFC2236 8.1)}(hj FhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMohjEubj)}(h(Minimum: 1 (as specified by RFC6636 4.5)h]h(Minimum: 1 (as specified by RFC6636 4.5)}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMqhjEubeh}(h]h ]h"]h$]h&]uh1j hjEubeh}(h]h ]h"]h$]h&]uh1hhhhMqhjtDhhubh)}(hXforce_igmp_version - INTEGER - 0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback allowed. Will back to IGMPv3 mode again if all IGMPv1/v2 Querier Present timer expires. - 1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if receive IGMPv2/v3 query. - 2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive IGMPv1 query message. Will reply report if receive IGMPv3 query. - 3 - Enforce to use IGMP version 3. The same react with default 0. .. note:: this is not the same with force_mld_version because IGMPv3 RFC3376 Security Considerations does not have clear description that we could ignore other version messages completely as MLDv2 RFC3810. So make this value as default 0 is recommended. h](h)}(hforce_igmp_version - INTEGERh]hforce_igmp_version - INTEGER}(hj8FhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj4Fubj )}(hhh](j;)}(hhh](j@)}(h0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback allowed. Will back to IGMPv3 mode again if all IGMPv1/v2 Querier Present timer expires.h]j)}(h0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback allowed. Will back to IGMPv3 mode again if all IGMPv1/v2 Querier Present timer expires.h]h0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback allowed. Will back to IGMPv3 mode again if all IGMPv1/v2 Querier Present timer expires.}(hjPFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMthjLFubah}(h]h ]h"]h$]h&]uh1j?hjIFubj@)}(h\1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if receive IGMPv2/v3 query.h]j)}(h\1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if receive IGMPv2/v3 query.h]h\1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if receive IGMPv2/v3 query.}(hjhFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMwhjdFubah}(h]h ]h"]h$]h&]uh1j?hjIFubj@)}(h2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive IGMPv1 query message. Will reply report if receive IGMPv3 query.h]j)}(h2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive IGMPv1 query message. Will reply report if receive IGMPv3 query.h]h2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive IGMPv1 query message. Will reply report if receive IGMPv3 query.}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMyhj|Fubah}(h]h ]h"]h$]h&]uh1j?hjIFubj@)}(hB3 - Enforce to use IGMP version 3. The same react with default 0. h]j)}(hA3 - Enforce to use IGMP version 3. The same react with default 0.h]hA3 - Enforce to use IGMP version 3. The same react with default 0.}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM{hjFubah}(h]h ]h"]h$]h&]uh1j?hjIFubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMthjFFubhnote)}(hthis is not the same with force_mld_version because IGMPv3 RFC3376 Security Considerations does not have clear description that we could ignore other version messages completely as MLDv2 RFC3810. So make this value as default 0 is recommended.h]j)}(hthis is not the same with force_mld_version because IGMPv3 RFC3376 Security Considerations does not have clear description that we could ignore other version messages completely as MLDv2 RFC3810. So make this value as default 0 is recommended.h]hthis is not the same with force_mld_version because IGMPv3 RFC3376 Security Considerations does not have clear description that we could ignore other version messages completely as MLDv2 RFC3810. So make this value as default 0 is recommended.}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjFubah}(h]h ]h"]h$]h&]uh1jFhjFFubeh}(h]h ]h"]h$]h&]uh1j hj4Fubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hu``conf/interface/*`` changes special settings per interface (where interface" is the name of your network interface) h](h)}(h``conf/interface/*``h]hliteral)}(hjFh]hconf/interface/*}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jFhjFubah}(h]h ]h"]h$]h&]uh1hhhhMhjFubj )}(hhh]j)}(h_changes special settings per interface (where interface" is the name of your network interface)h]hachanges special settings per interface (where interface” is the name of your network interface)}(hjFhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjFubah}(h]h ]h"]h$]h&]uh1j hjFubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hC``conf/all/*`` is special, changes the settings for all interfaces h](h)}(h``conf/all/*``h]jF)}(hjGh]h conf/all/*}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jFhjGubah}(h]h ]h"]h$]h&]uh1hhhhMhjGubj )}(hhh]j)}(h3is special, changes the settings for all interfacesh]h3is special, changes the settings for all interfaces}(hj0GhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-Gubah}(h]h ]h"]h$]h&]uh1j hjGubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hlog_martians - BOOLEAN Log packets with impossible addresses to kernel log. log_martians for the interface will be enabled if at least one of conf/{all,interface}/log_martians is set to TRUE, it will be disabled otherwise h](h)}(hlog_martians - BOOLEANh]hlog_martians - BOOLEAN}(hjNGhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjJGubj )}(hhh]j)}(hLog packets with impossible addresses to kernel log. log_martians for the interface will be enabled if at least one of conf/{all,interface}/log_martians is set to TRUE, it will be disabled otherwiseh]hLog packets with impossible addresses to kernel log. log_martians for the interface will be enabled if at least one of conf/{all,interface}/log_martians is set to TRUE, it will be disabled otherwise}(hj_GhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj\Gubah}(h]h ]h"]h$]h&]uh1j hjJGubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXaccept_redirects - BOOLEAN Accept ICMP redirect messages. accept_redirects for the interface will be enabled if: - both conf/{all,interface}/accept_redirects are TRUE in the case forwarding for the interface is enabled or - at least one of conf/{all,interface}/accept_redirects is TRUE in the case forwarding for the interface is disabled accept_redirects for the interface will be disabled otherwise default: - TRUE (host) - FALSE (router) h](h)}(haccept_redirects - BOOLEANh]haccept_redirects - BOOLEAN}(hj}GhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjyGubj )}(hhh](j)}(hUAccept ICMP redirect messages. accept_redirects for the interface will be enabled if:h]hUAccept ICMP redirect messages. accept_redirects for the interface will be enabled if:}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubj;)}(hhh]j@)}(hhboth conf/{all,interface}/accept_redirects are TRUE in the case forwarding for the interface is enabled h]j)}(hgboth conf/{all,interface}/accept_redirects are TRUE in the case forwarding for the interface is enabledh]hgboth conf/{all,interface}/accept_redirects are TRUE in the case forwarding for the interface is enabled}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubah}(h]h ]h"]h$]h&]uh1j?hjGubah}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjGubj)}(horh]hor}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubj;)}(hhh]j@)}(hsat least one of conf/{all,interface}/accept_redirects is TRUE in the case forwarding for the interface is disabled h]j)}(hrat least one of conf/{all,interface}/accept_redirects is TRUE in the case forwarding for the interface is disabledh]hrat least one of conf/{all,interface}/accept_redirects is TRUE in the case forwarding for the interface is disabled}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubah}(h]h ]h"]h$]h&]uh1j?hjGubah}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjGubj)}(h=accept_redirects for the interface will be disabled otherwiseh]h=accept_redirects for the interface will be disabled otherwise}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubj)}(hdefault:h]hdefault:}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjGubj )}(h- TRUE (host) - FALSE (router) h]j;)}(hhh](j@)}(h TRUE (host)h]j)}(hjHh]h TRUE (host)}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjHubah}(h]h ]h"]h$]h&]uh1j?hj Hubj@)}(hFALSE (router) h]j)}(hFALSE (router)h]hFALSE (router)}(hj*HhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj&Hubah}(h]h ]h"]h$]h&]uh1j?hj Hubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjHubah}(h]h ]h"]h$]h&]uh1j hhhMhjGubeh}(h]h ]h"]h$]h&]uh1j hjyGubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hforwarding - BOOLEAN Enable IP forwarding on this interface. This controls whether packets received _on_ this interface can be forwarded. h](h)}(hforwarding - BOOLEANh]hforwarding - BOOLEAN}(hjZHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjVHubj )}(hhh]j)}(huEnable IP forwarding on this interface. This controls whether packets received _on_ this interface can be forwarded.h]huEnable IP forwarding on this interface. This controls whether packets received _on_ this interface can be forwarded.}(hjkHhhhNhNubah+}(h]h ]h"]h$]h&]uh1jhhhMhjhHubah}(h]h ]h"]h$]h&]uh1j hjVHubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hmc_forwarding - BOOLEAN Do multicast routing. The kernel needs to be compiled with CONFIG_MROUTE and a multicast routing daemon is required. conf/all/mc_forwarding must also be set to TRUE to enable multicast routing for the interface h](h)}(hmc_forwarding - BOOLEANh]hmc_forwarding - BOOLEAN}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjHubj )}(hhh]j)}(hDo multicast routing. The kernel needs to be compiled with CONFIG_MROUTE and a multicast routing daemon is required. conf/all/mc_forwarding must also be set to TRUE to enable multicast routing for the interfaceh]hDo multicast routing. The kernel needs to be compiled with CONFIG_MROUTE and a multicast routing daemon is required. conf/all/mc_forwarding must also be set to TRUE to enable multicast routing for the interface}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjHubah}(h]h ]h"]h$]h&]uh1j hjHubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXmedium_id - INTEGER Integer value used to differentiate the devices by the medium they are attached to. Two devices can have different id values when the broadcast packets are received only on one of them. The default value 0 means that the device is the only interface to its medium, value of -1 means that medium is not known. Currently, it is used to change the proxy_arp behavior: the proxy_arp feature is enabled for packets forwarded between two devices attached to different media. h](h)}(hmedium_id - INTEGERh]hmedium_id - INTEGER}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjHubj )}(hhh](j)}(hX4Integer value used to differentiate the devices by the medium they are attached to. Two devices can have different id values when the broadcast packets are received only on one of them. The default value 0 means that the device is the only interface to its medium, value of -1 means that medium is not known.h]hX4Integer value used to differentiate the devices by the medium they are attached to. Two devices can have different id values when the broadcast packets are received only on one of them. The default value 0 means that the device is the only interface to its medium, value of -1 means that medium is not known.}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjHubj)}(hCurrently, it is used to change the proxy_arp behavior: the proxy_arp feature is enabled for packets forwarded between two devices attached to different media.h]hCurrently, it is used to change the proxy_arp behavior: the proxy_arp feature is enabled for packets forwarded between two devices attached to different media.}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjHubeh}(h]h ]h"]h$]h&]uh1j hjHubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hproxy_arp - BOOLEAN Do proxy arp. proxy_arp for the interface will be enabled if at least one of conf/{all,interface}/proxy_arp is set to TRUE, it will be disabled otherwise h](h)}(hproxy_arp - BOOLEANh]hproxy_arp - BOOLEAN}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjHubj )}(hhh](j)}(h Do proxy arp.h]h Do proxy arp.}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubj)}(hproxy_arp for the interface will be enabled if at least one of conf/{all,interface}/proxy_arp is set to TRUE, it will be disabled otherwiseh]hproxy_arp for the interface will be enabled if at least one of conf/{all,interface}/proxy_arp is set to TRUE, it will be disabled otherwise}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubeh}(h]h ]h"]h$]h&]uh1j hjHubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXproxy_arp_pvlan - BOOLEAN Private VLAN proxy arp. Basically allow proxy arp replies back to the same interface (from which the ARP request/solicitation was received). This is done to support (ethernet) switch features, like RFC 3069, where the individual ports are NOT allowed to communicate with each other, but they are allowed to talk to the upstream router. As described in RFC 3069, it is possible to allow these hosts to communicate through the upstream router by proxy_arp'ing. Don't need to be used together with proxy_arp. This technology is known by different names: - In RFC 3069 it is called VLAN Aggregation. - Cisco and Allied Telesyn call it Private VLAN. - Hewlett-Packard call it Source-Port filtering or port-isolation. - Ericsson call it MAC-Forced Forwarding (RFC Draft). h](h)}(hproxy_arp_pvlan - BOOLEANh]hproxy_arp_pvlan - BOOLEAN}(hj2IhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj.Iubj )}(hhh](j)}(hPrivate VLAN proxy arp.h]hPrivate VLAN proxy arp.}(hjCIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@Iubj)}(htBasically allow proxy arp replies back to the same interface (from which the ARP request/solicitation was received).h]htBasically allow proxy arp replies back to the same interface (from which the ARP request/solicitation was received).}(hjQIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@Iubj)}(hXmThis is done to support (ethernet) switch features, like RFC 3069, where the individual ports are NOT allowed to communicate with each other, but they are allowed to talk to the upstream router. As described in RFC 3069, it is possible to allow these hosts to communicate through the upstream router by proxy_arp'ing. Don't need to be used together with proxy_arp.h]hXqThis is done to support (ethernet) switch features, like RFC 3069, where the individual ports are NOT allowed to communicate with each other, but they are allowed to talk to the upstream router. As described in RFC 3069, it is possible to allow these hosts to communicate through the upstream router by proxy_arp’ing. Don’t need to be used together with proxy_arp.}(hj_IhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@Iubj)}(h,This technology is known by different names:h]h,This technology is known by different names:}(hjmIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj@Iubj;)}(hhh](j@)}(h*In RFC 3069 it is called VLAN Aggregation.h]j)}(hjIh]h*In RFC 3069 it is called VLAN Aggregation.}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj~Iubah}(h]h ]h"]h$]h&]uh1j?hj{Iubj@)}(h.Cisco and Allied Telesyn call it Private VLAN.h]j)}(hjIh]h.Cisco and Allied Telesyn call it Private VLAN.}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubah}(h]h ]h"]h$]h&]uh1j?hj{Iubj@)}(h@Hewlett-Packard call it Source-Port filtering or port-isolation.h]j)}(hjIh]h@Hewlett-Packard call it Source-Port filtering or port-isolation.}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubah}(h]h ]h"]h$]h&]uh1j?hj{Iubj@)}(h4Ericsson call it MAC-Forced Forwarding (RFC Draft). h]j)}(h3Ericsson call it MAC-Forced Forwarding (RFC Draft).h]h3Ericsson call it MAC-Forced Forwarding (RFC Draft).}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubah}(h]h ]h"]h$]h&]uh1j?hj{Iubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj@Iubeh}(h]h ]h"]h$]h&]uh1j hj.Iubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXproxy_delay - INTEGER Delay proxy response. Delay response to a neighbor solicitation when proxy_arp or proxy_ndp is enabled. A random value between [0, proxy_delay) will be chosen, setting to zero means reply with no delay. Value in jiffies. Defaults to 80. h](h)}(hproxy_delay - INTEGERh]hproxy_delay - INTEGER}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjIubj )}(hhh](j)}(hDelay proxy response.h]hDelay proxy response.}(hjJhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubj)}(hDelay response to a neighbor solicitation when proxy_arp or proxy_ndp is enabled. A random value between [0, proxy_delay) will be chosen, setting to zero means reply with no delay. Value in jiffies. Defaults to 80.h]hDelay response to a neighbor solicitation when proxy_arp or proxy_ndp is enabled. A random value between [0, proxy_delay) will be chosen, setting to zero means reply with no delay. Value in jiffies. Defaults to 80.}(hjJhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjIubeh}(h]h ]h"]h$]h&]uh1j hjIubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXshared_media - BOOLEAN Send(router) or accept(host) RFC1620 shared media redirects. Overrides secure_redirects. shared_media for the interface will be enabled if at least one of conf/{all,interface}/shared_media is set to TRUE, it will be disabled otherwise default TRUE h](h)}(hshared_media - BOOLEANh]hshared_media - BOOLEAN}(hj.JhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj*Jubj )}(hhh](j)}(hXSend(router) or accept(host) RFC1620 shared media redirects. Overrides secure_redirects.h]hXSend(router) or accept(host) RFC1620 shared media redirects. Overrides secure_redirects.}(hj?JhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjPubj@)}(h'1 - create new entries in the ARP tableh]j)}(hjZPh]h'1 - create new entries in the ARP table}(hj\PhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjXPubah}(h]h ]h"]h$]h&]uh1j?hj>Pubj@)}(h2 - create new entries only if the source IP address is in the same subnet as an address configured on the interface that received the garp message. h]j)}(h2 - create new entries only if the source IP address is in the same subnet as an address configured on the interface that received the garp message.h]h2 - create new entries only if the source IP address is in the same subnet as an address configured on the interface that received the garp message.}(hjsPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjoPubah}(h]h ]h"]h$]h&]uh1j?hj>Pubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj-Pubj)}(hnBoth replies and requests type gratuitous arp will trigger the ARP table to be updated, if this setting is on.h]hnBoth replies and requests type gratuitous arp will trigger the ARP table to be updated, if this setting is on.}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-Pubj)}(hIf the ARP table already contains the IP address of the gratuitous arp frame, the arp table will be updated regardless if this setting is on or off.h]hIf the ARP table already contains the IP address of the gratuitous arp frame, the arp table will be updated regardless if this setting is on or off.}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj-Pubeh}(h]h ]h"]h$]h&]uh1j hjPubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXarp_evict_nocarrier - BOOLEAN Clears the ARP cache on NOCARRIER events. This option is important for wireless devices where the ARP cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1). Possible values: - 0 (disabled) - Do not clear ARP cache on NOCARRIER events - 1 (enabled) - Clear the ARP cache on NOCARRIER events Default: 1 (enabled) h](h)}(harp_evict_nocarrier - BOOLEANh]harp_evict_nocarrier - BOOLEAN}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjPubj )}(hhh](j)}(hClears the ARP cache on NOCARRIER events. This option is important for wireless devices where the ARP cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1).h]hClears the ARP cache on NOCARRIER events. This option is important for wireless devices where the ARP cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1).}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjPubj)}(hPossible values:h]hPossible values:}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjPubj;)}(hhh](j@)}(h90 (disabled) - Do not clear ARP cache on NOCARRIER eventsh]j)}(hjPh]h90 (disabled) - Do not clear ARP cache on NOCARRIER events}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjPubah}(h]h ]h"]h$]h&]uh1j?hjPubj@)}(h71 (enabled) - Clear the ARP cache on NOCARRIER events h]j)}(h61 (enabled) - Clear the ARP cache on NOCARRIER eventsh]h61 (enabled) - Clear the ARP cache on NOCARRIER events}(hjQhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjQubah}(h]h ]h"]h$]h&]uh1j?hjPubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjPubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjQhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjPubeh}(h]h ]h"]h$]h&]uh1j hjPubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hmcast_solicit - INTEGER The maximum number of multicast probes in INCOMPLETE state, when the associated hardware address is unknown. Defaults to 3. h](h)}(hmcast_solicit - INTEGERh]hmcast_solicit - INTEGER}(hjIgnore routes whose link is down when performing a FIB lookup.h]h>Ignore routes whose link is down when performing a FIB lookup.}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubj)}(hPossible values:h]hPossible values:}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjSh]h 0 (disabled)}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubah}(h]h ]h"]h$]h&]uh1j?hjSubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubah}(h]h ]h"]h$]h&]uh1j?hjSubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjSubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubeh}(h]h ]h"]h$]h&]uh1j hjtSubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hX promote_secondaries - BOOLEAN When a primary IP address is removed from this interface promote a corresponding secondary IP address instead of removing all the corresponding secondary IP addresses. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hpromote_secondaries - BOOLEANh]hpromote_secondaries - BOOLEAN}(hjShhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjSubj )}(hhh](j)}(hWhen a primary IP address is removed from this interface promote a corresponding secondary IP address instead of removing all the corresponding secondary IP addresses.h]hWhen a primary IP address is removed from this interface promote a corresponding secondary IP address instead of removing all the corresponding secondary IP addresses.}(hj ThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj Tubj)}(hPossible values:h]hPossible values:}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj Tubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj-Th]h 0 (disabled)}(hj/ThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj+Tubah}(h]h ]h"]h$]h&]uh1j?hj(Tubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjFThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjBTubah}(h]h ]h"]h$]h&]uh1j?hj(Tubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj Tubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj`ThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj Tubeh}(h]h ]h"]h$]h&]uh1j hjSubeh}(h]h ]h"]h$]h&]uh1hhhhMhjtDhhubh)}(hXBdrop_unicast_in_l2_multicast - BOOLEAN Drop any unicast IP packets that are received in link-layer multicast (or broadcast) frames. This behavior (for multicast) is actually a SHOULD in RFC 1122, but is disabled by default for compatibility reasons. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h&drop_unicast_in_l2_multicast - BOOLEANh]h&drop_unicast_in_l2_multicast - BOOLEAN}(hj~ThhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjzTubj )}(hhh](j)}(h\Drop any unicast IP packets that are received in link-layer multicast (or broadcast) frames.h]h\Drop any unicast IP packets that are received in link-layer multicast (or broadcast) frames.}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjTubj)}(huThis behavior (for multicast) is actually a SHOULD in RFC 1122, but is disabled by default for compatibility reasons.h]huThis behavior (for multicast) is actually a SHOULD in RFC 1122, but is disabled by default for compatibility reasons.}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjTubj)}(hPossible values:h]hPossible values:}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjTubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjTh]h 0 (disabled)}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjTubah}(h]h ]h"]h$]h&]uh1j?hjTubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjTubah}(h]h ]h"]h$]h&]uh1j?hjTubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjTubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjTubeh}(h]h ]h"]h$]h&]uh1j hjzTubeh}(h]h ]h"]h$]h&]uh1hhhhM hjtDhhubh)}(hX%drop_gratuitous_arp - BOOLEAN Drop all gratuitous ARP frames, for example if there's a known good ARP proxy on the network and such frames need not be used (or in the case of 802.11, must not be used to prevent attacks.) Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hdrop_gratuitous_arp - BOOLEANh]hdrop_gratuitous_arp - BOOLEAN}(hjUhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj Uubj )}(hhh](j)}(hDrop all gratuitous ARP frames, for example if there's a known good ARP proxy on the network and such frames need not be used (or in the case of 802.11, must not be used to prevent attacks.)h]hDrop all gratuitous ARP frames, for example if there’s a known good ARP proxy on the network and such frames need not be used (or in the case of 802.11, must not be used to prevent attacks.)}(hj UhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjUubj)}(hPossible values:h]hPossible values:}(hj.UhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjUubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjAUh]h 0 (disabled)}(hjCUhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj?Uubah}(h]h ]h"]h$]h&]uh1j?hj0 - Layer 3 (source and destination addresses plus flow label)h]j)}(hjZh]h>0 - Layer 3 (source and destination addresses plus flow label)}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjZubah}(h]h ]h"]h$]h&]uh1j?hjZubj@)}(h1 - Layer 4 (standard 5-tuple)h]j)}(hjZh]h1 - Layer 4 (standard 5-tuple)}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjZubah}(h]h ]h"]h$]h&]uh1j?hjZubj@)}(h'2 - Layer 3 or inner Layer 3 if presenth]j)}(hjZh]h'2 - Layer 3 or inner Layer 3 if present}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjZubah}(h]h ]h"]h$]h&]uh1j?hjZubj@)}(hy3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctl h]j)}(hx3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctlh]hx3 - Custom multipath hash. Fields used for multipath hash calculation are determined by fib_multipath_hash_fields sysctl}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjZubah}(h]h ]h"]h$]h&]uh1j?hjZubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjZubeh}(h]h ]h"]h$]h&]uh1j hjsZubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hXfib_multipath_hash_fields - UNSIGNED INTEGER When fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl. This value is a bitmask which enables various fields for multipath hash calculation. Possible fields are: ====== ============================ 0x0001 Source IP address 0x0002 Destination IP address 0x0004 IP protocol 0x0008 Flow Label 0x0010 Source port 0x0020 Destination port 0x0040 Inner source IP address 0x0080 Inner destination IP address 0x0100 Inner IP protocol 0x0200 Inner Flow Label 0x0400 Inner source port 0x0800 Inner destination port ====== ============================ Default: 0x0007 (source IP, destination IP and IP protocol) h](h)}(h,fib_multipath_hash_fields - UNSIGNED INTEGERh]h,fib_multipath_hash_fields - UNSIGNED INTEGER}(hj([hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj$[ubj )}(hhh](j)}(hWhen fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl.h]hWhen fib_multipath_hash_policy is set to 3 (custom multipath hash), the fields used for multipath hash calculation are determined by this sysctl.}(hj9[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6[ubj)}(hTThis value is a bitmask which enables various fields for multipath hash calculation.h]hTThis value is a bitmask which enables various fields for multipath hash calculation.}(hjG[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6[ubj)}(hPossible fields are:h]hPossible fields are:}(hjU[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6[ubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjf[ubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjf[ubj)}(hhh](j)}(hhh](j)}(hhh]j)}(h0x0001h]h0x0001}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhj[ubj)}(hhh]j)}(hSource IP addressh]hSource IP address}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhj[ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0002h]h0x0002}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhj[ubj)}(hhh]j)}(hDestination IP addressh]hDestination IP address}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhj[ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0004h]h0x0004}(hj[hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhj[ubj)}(hhh]j)}(h IP protocolh]h IP protocol}(hj \hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj\ubah}(h]h ]h"]h$]h&]uh1jhj[ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0008h]h0x0008}(hj+\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj(\ubah}(h]h ]h"]h$]h&]uh1jhj%\ubj)}(hhh]j)}(h Flow Labelh]h Flow Label}(hjB\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj?\ubah}(h]h ]h"]h$]h&]uh1jhj%\ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0010h]h0x0010}(hjb\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_\ubah}(h]h ]h"]h$]h&]uh1jhj\\ubj)}(hhh]j)}(h Source porth]h Source port}(hjy\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjv\ubah}(h]h ]h"]h$]h&]uh1jhj\\ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0020h]h0x0020}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj\ubah}(h]h ]h"]h$]h&]uh1jhj\ubj)}(hhh]j)}(hDestination porth]hDestination port}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj\ubah}(h]h ]h"]h$]h&]uh1jhj\ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0040h]h0x0040}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj\ubah}(h]h ]h"]h$]h&]uh1jhj\ubj)}(hhh]j)}(hInner source IP addressh]hInner source IP address}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj\ubah}(h]h ]h"]h$]h&]uh1jhj\ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0080h]h0x0080}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubj)}(hhh]j)}(hInner destination IP addressh]hInner destination IP address}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0100h]h0x0100}(hj>]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj;]ubah}(h]h ]h"]h$]h&]uh1jhj8]ubj)}(hhh]j)}(hInner IP protocolh]hInner IP protocol}(hjU]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjR]ubah}(h]h ]h"]h$]h&]uh1jhj8]ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0200h]h0x0200}(hju]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjr]ubah}(h]h ]h"]h$]h&]uh1jhjo]ubj)}(hhh]j)}(hInner Flow Labelh]hInner Flow Label}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhjo]ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0400h]h0x0400}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubj)}(hhh]j)}(hInner source porth]hInner source port}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubj)}(hhh](j)}(hhh]j)}(h0x0800h]h0x0800}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubj)}(hhh]j)}(hInner destination porth]hInner destination port}(hj]hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1jhj]ubeh}(h]h ]h"]h$]h&]uh1jhj}[ubeh}(h]h ]h"]h$]h&]uh1jhjf[ubeh}(h]h ]h"]h$]h&]colsKuh1jhjc[ubah}(h]h ]h"]h$]h&]uh1jhj6[ubj)}(h;Default: 0x0007 (source IP, destination IP and IP protocol)h]h;Default: 0x0007 (source IP, destination IP and IP protocol)}(hj'^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6[ubeh}(h]h ]h"]h$]h&]uh1j hj$[ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hanycast_src_echo_reply - BOOLEAN Controls the use of anycast addresses as source addresses for ICMPv6 echo reply Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(h anycast_src_echo_reply - BOOLEANh]h anycast_src_echo_reply - BOOLEAN}(hjE^hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjA^ubj )}(hhh](j)}(hOControls the use of anycast addresses as source addresses for ICMPv6 echo replyh]hOControls the use of anycast addresses as source addresses for ICMPv6 echo reply}(hjV^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjS^ubj)}(hPossible values:h]hPossible values:}(hjd^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjS^ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjw^h]h 0 (disabled)}(hjy^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hju^ubah}(h]h ]h"]h$]h&]uh1j?hjr^ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj^ubah}(h]h ]h"]h$]h&]uh1j?hjr^ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjS^ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjS^ubeh}(h]h ]h"]h$]h&]uh1j hjA^ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hidgen_delay - INTEGER Controls the delay in seconds after which time to retry privacy stable address generation if a DAD conflict is detected. Default: 1 (as specified in RFC7217) h](h)}(hidgen_delay - INTEGERh]hidgen_delay - INTEGER}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj^ubj )}(hhh](j)}(hxControls the delay in seconds after which time to retry privacy stable address generation if a DAD conflict is detected.h]hxControls the delay in seconds after which time to retry privacy stable address generation if a DAD conflict is detected.}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj^ubj)}(h$Default: 1 (as specified in RFC7217)h]h$Default: 1 (as specified in RFC7217)}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj^ubeh}(h]h ]h"]h$]h&]uh1j hj^ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hidgen_retries - INTEGER Controls the number of retries to generate a stable privacy address if a DAD conflict is detected. Default: 3 (as specified in RFC7217) h](h)}(hidgen_retries - INTEGERh]hidgen_retries - INTEGER}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj_ubj )}(hhh](j)}(hbControls the number of retries to generate a stable privacy address if a DAD conflict is detected.h]hbControls the number of retries to generate a stable privacy address if a DAD conflict is detected.}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubj)}(h$Default: 3 (as specified in RFC7217)h]h$Default: 3 (as specified in RFC7217)}(hj$_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubeh}(h]h ]h"]h$]h&]uh1j hj_ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hmld_qrv - INTEGER Controls the MLD query robustness variable (see RFC3810 9.1). Default: 2 (as specified by RFC3810 9.1) Minimum: 1 (as specified by RFC6636 4.5) h](h)}(hmld_qrv - INTEGERh]hmld_qrv - INTEGER}(hjB_hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj>_ubj )}(hhh](j)}(h=Controls the MLD query robustness variable (see RFC3810 9.1).h]h=Controls the MLD query robustness variable (see RFC3810 9.1).}(hjS_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjP_ubj)}(h(Default: 2 (as specified by RFC3810 9.1)h]h(Default: 2 (as specified by RFC3810 9.1)}(hja_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjP_ubj)}(h(Minimum: 1 (as specified by RFC6636 4.5)h]h(Minimum: 1 (as specified by RFC6636 4.5)}(hjo_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjP_ubeh}(h]h ]h"]h$]h&]uh1j hj>_ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hXmax_dst_opts_number - INTEGER Maximum number of non-padding TLVs allowed in a Destination options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number. Default: 8 h](h)}(hmax_dst_opts_number - INTEGERh]hmax_dst_opts_number - INTEGER}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj_ubj )}(hhh](j)}(hMaximum number of non-padding TLVs allowed in a Destination options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number.h]hMaximum number of non-padding TLVs allowed in a Destination options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number.}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubj)}(h Default: 8h]h Default: 8}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubeh}(h]h ]h"]h$]h&]uh1j hj_ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hXmax_hbh_opts_number - INTEGER Maximum number of non-padding TLVs allowed in a Hop-by-Hop options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number. Default: 8 h](h)}(hmax_hbh_opts_number - INTEGERh]hmax_hbh_opts_number - INTEGER}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj_ubj )}(hhh](j)}(hMaximum number of non-padding TLVs allowed in a Hop-by-Hop options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number.h]hMaximum number of non-padding TLVs allowed in a Hop-by-Hop options extension header. If this value is less than zero then unknown options are disallowed and the number of known TLVs allowed is the absolute value of this number.}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubj)}(h Default: 8h]h Default: 8}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj_ubeh}(h]h ]h"]h$]h&]uh1j hj_ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hmax_dst_opts_length - INTEGER Maximum length allowed for a Destination options extension header. Default: INT_MAX (unlimited) h](h)}(hmax_dst_opts_length - INTEGERh]hmax_dst_opts_length - INTEGER}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj`ubj )}(hhh](j)}(hBMaximum length allowed for a Destination options extension header.h]hBMaximum length allowed for a Destination options extension header.}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubj)}(hDefault: INT_MAX (unlimited)h]hDefault: INT_MAX (unlimited)}(hj&`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubeh}(h]h ]h"]h$]h&]uh1j hj`ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hymax_hbh_length - INTEGER Maximum length allowed for a Hop-by-Hop options extension header. Default: INT_MAX (unlimited) h](h)}(hmax_hbh_length - INTEGERh]hmax_hbh_length - INTEGER}(hjD`hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj@`ubj )}(hhh](j)}(hAMaximum length allowed for a Hop-by-Hop options extension header.h]hAMaximum length allowed for a Hop-by-Hop options extension header.}(hjU`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjR`ubj)}(hDefault: INT_MAX (unlimited)h]hDefault: INT_MAX (unlimited)}(hjc`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjR`ubeh}(h]h ]h"]h$]h&]uh1j hj@`ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hXskip_notify_on_dev_down - BOOLEAN Controls whether an RTM_DELROUTE message is generated for routes removed when a device is taken down or deleted. IPv4 does not generate this message; IPv6 does by default. Setting this sysctl to true skips the message, making IPv4 and IPv6 on par in relying on userspace caches to track link events and evict routes. Possible values: - 0 (disabled) - generate the message - 1 (enabled) - skip generating the message Default: 0 (disabled) h](h)}(h!skip_notify_on_dev_down - BOOLEANh]h!skip_notify_on_dev_down - BOOLEAN}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj}`ubj )}(hhh](j)}(hX<Controls whether an RTM_DELROUTE message is generated for routes removed when a device is taken down or deleted. IPv4 does not generate this message; IPv6 does by default. Setting this sysctl to true skips the message, making IPv4 and IPv6 on par in relying on userspace caches to track link events and evict routes.h]hX<Controls whether an RTM_DELROUTE message is generated for routes removed when a device is taken down or deleted. IPv4 does not generate this message; IPv6 does by default. Setting this sysctl to true skips the message, making IPv4 and IPv6 on par in relying on userspace caches to track link events and evict routes.}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubj)}(hPossible values:h]hPossible values:}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubj;)}(hhh](j@)}(h#0 (disabled) - generate the messageh]j)}(hj`h]h#0 (disabled) - generate the message}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubah}(h]h ]h"]h$]h&]uh1j?hj`ubj@)}(h+1 (enabled) - skip generating the message h]j)}(h*1 (enabled) - skip generating the messageh]h*1 (enabled) - skip generating the message}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubah}(h]h ]h"]h$]h&]uh1j?hj`ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj`ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj`hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj`ubeh}(h]h ]h"]h$]h&]uh1j hj}`ubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hXnexthop_compat_mode - BOOLEAN New nexthop API provides a means for managing nexthops independent of prefixes. Backwards compatibility with old route format is enabled by default which means route dumps and notifications contain the new nexthop attribute but also the full, expanded nexthop definition. Further, updates or deletes of a nexthop configuration generate route notifications for each fib entry using the nexthop. Once a system understands the new API, this sysctl can be disabled to achieve full performance benefits of the new API by disabling the nexthop expansion and extraneous notifications. Note that as a backward-compatible mode, dumping of modern features might be incomplete or wrong. For example, resilient groups will not be shown as such, but rather as just a list of next hops. Also weights that do not fit into 8 bits will show incorrectly. Default: true (backward compat mode) h](h)}(hnexthop_compat_mode - BOOLEANh]hnexthop_compat_mode - BOOLEAN}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjaubj )}(hhh](j)}(hXANew nexthop API provides a means for managing nexthops independent of prefixes. Backwards compatibility with old route format is enabled by default which means route dumps and notifications contain the new nexthop attribute but also the full, expanded nexthop definition. Further, updates or deletes of a nexthop configuration generate route notifications for each fib entry using the nexthop. Once a system understands the new API, this sysctl can be disabled to achieve full performance benefits of the new API by disabling the nexthop expansion and extraneous notifications.h]hXANew nexthop API provides a means for managing nexthops independent of prefixes. Backwards compatibility with old route format is enabled by default which means route dumps and notifications contain the new nexthop attribute but also the full, expanded nexthop definition. Further, updates or deletes of a nexthop configuration generate route notifications for each fib entry using the nexthop. Once a system understands the new API, this sysctl can be disabled to achieve full performance benefits of the new API by disabling the nexthop expansion and extraneous notifications.}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubj)}(hXNote that as a backward-compatible mode, dumping of modern features might be incomplete or wrong. For example, resilient groups will not be shown as such, but rather as just a list of next hops. Also weights that do not fit into 8 bits will show incorrectly.h]hXNote that as a backward-compatible mode, dumping of modern features might be incomplete or wrong. For example, resilient groups will not be shown as such, but rather as just a list of next hops. Also weights that do not fit into 8 bits will show incorrectly.}(hj#ahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubj)}(h$Default: true (backward compat mode)h]h$Default: true (backward compat mode)}(hj1ahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubeh}(h]h ]h"]h$]h&]uh1j hjaubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hX?fib_notify_on_flag_change - INTEGER Whether to emit RTM_NEWROUTE notifications whenever RTM_F_OFFLOAD/ RTM_F_TRAP/RTM_F_OFFLOAD_FAILED flags are changed. After installing a route to the kernel, user space receives an acknowledgment, which means the route was installed in the kernel, but not necessarily in hardware. It is also possible for a route already installed in hardware to change its action and therefore its flags. For example, a host route that is trapping packets can be "promoted" to perform decapsulation following the installation of an IPinIP/VXLAN tunnel. The notifications will indicate to user-space the state of the route. Default: 0 (Do not emit notifications.) Possible values: - 0 - Do not emit notifications. - 1 - Emit notifications. - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change. h](h)}(h#fib_notify_on_flag_change - INTEGERh]h#fib_notify_on_flag_change - INTEGER}(hjOahhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjKaubj )}(hhh](j)}(huWhether to emit RTM_NEWROUTE notifications whenever RTM_F_OFFLOAD/ RTM_F_TRAP/RTM_F_OFFLOAD_FAILED flags are changed.h]huWhether to emit RTM_NEWROUTE notifications whenever RTM_F_OFFLOAD/ RTM_F_TRAP/RTM_F_OFFLOAD_FAILED flags are changed.}(hj`ahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]aubj)}(hXAfter installing a route to the kernel, user space receives an acknowledgment, which means the route was installed in the kernel, but not necessarily in hardware. It is also possible for a route already installed in hardware to change its action and therefore its flags. For example, a host route that is trapping packets can be "promoted" to perform decapsulation following the installation of an IPinIP/VXLAN tunnel. The notifications will indicate to user-space the state of the route.h]hXAfter installing a route to the kernel, user space receives an acknowledgment, which means the route was installed in the kernel, but not necessarily in hardware. It is also possible for a route already installed in hardware to change its action and therefore its flags. For example, a host route that is trapping packets can be “promoted” to perform decapsulation following the installation of an IPinIP/VXLAN tunnel. The notifications will indicate to user-space the state of the route.}(hjnahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]aubj)}(h'Default: 0 (Do not emit notifications.)h]h'Default: 0 (Do not emit notifications.)}(hj|ahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]aubj)}(hPossible values:h]hPossible values:}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]aubj;)}(hhh](j@)}(h0 - Do not emit notifications.h]j)}(hjah]h0 - Do not emit notifications.}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubah}(h]h ]h"]h$]h&]uh1j?hjaubj@)}(h1 - Emit notifications.h]j)}(hjah]h1 - Emit notifications.}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubah}(h]h ]h"]h$]h&]uh1j?hjaubj@)}(hB2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change. h]j)}(hA2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change.h]hA2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change.}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjaubah}(h]h ]h"]h$]h&]uh1j?hjaubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj]aubeh}(h]h ]h"]h$]h&]uh1j hjKaubeh}(h]h ]h"]h$]h&]uh1hhhhM hjVhhubh)}(hioam6_id - INTEGER Define the IOAM id of this node. Uses only 24 bits out of 32 in total. Possible value range: - Min: 0 - Max: 0xFFFFFF Default: 0xFFFFFF h](h)}(hioam6_id - INTEGERh]hioam6_id - INTEGER}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM) hjaubj )}(hhh](j)}(hFDefine the IOAM id of this node. Uses only 24 bits out of 32 in total.h]hFDefine the IOAM id of this node. Uses only 24 bits out of 32 in total.}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM" hjbubj)}(hPossible value range:h]hPossible value range:}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$ hjbubj;)}(hhh](j@)}(hMin: 0h]j)}(hj)bh]hMin: 0}(hj+bhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM& hj'bubah}(h]h ]h"]h$]h&]uh1j?hj$bubj@)}(hMax: 0xFFFFFF h]j)}(h Max: 0xFFFFFFh]h Max: 0xFFFFFF}(hjBbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM' hj>bubah}(h]h ]h"]h$]h&]uh1j?hj$bubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM& hjbubj)}(hDefault: 0xFFFFFFh]hDefault: 0xFFFFFF}(hj\bhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM) hjbubeh}(h]h ]h"]h$]h&]uh1j hjaubeh}(h]h ]h"]h$]h&]uh1hhhhM) hjVhhubh)}(hioam6_id_wide - LONG INTEGER Define the wide IOAM id of this node. Uses only 56 bits out of 64 in total. Can be different from ioam6_id. Possible value range: - Min: 0 - Max: 0xFFFFFFFFFFFFFF Default: 0xFFFFFFFFFFFFFF h](h)}(hioam6_id_wide - LONG INTEGERh]hioam6_id_wide - LONG INTEGER}(hjzbhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM4 hjvbubj )}(hhh](j)}(hkDefine the wide IOAM id of this node. Uses only 56 bits out of 64 in total. Can be different from ioam6_id.h]hkDefine the wide IOAM id of this node. Uses only 56 bits out of 64 in total. Can be different from ioam6_id.}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM, hjbubj)}(hPossible value range:h]hPossible value range:}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/ hjbubj;)}(hhh](j@)}(hMin: 0h]j)}(hjbh]hMin: 0}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM1 hjbubah}(h]h ]h"]h$]h&]uh1j?hjbubj@)}(hMax: 0xFFFFFFFFFFFFFF h]j)}(hMax: 0xFFFFFFFFFFFFFFh]hMax: 0xFFFFFFFFFFFFFF}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM2 hjbubah}(h]h ]h"]h$]h&]uh1j?hjbubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM1 hjbubj)}(hDefault: 0xFFFFFFFFFFFFFFh]hDefault: 0xFFFFFFFFFFFFFF}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4 hjbubeh}(h]h ]h"]h$]h&]uh1j hjvbubeh}(h]h ]h"]h$]h&]uh1hhhhM4 hjVhhubeh}(h]h ]h"]h$]h&]uh1hhjVhhhhhNubj)}(hIPv6 Fragmentation:h]hIPv6 Fragmentation:}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM6 hjVhhubh)}(hhh](h)}(hip6frag_high_thresh - INTEGER Maximum memory used to reassemble IPv6 fragments. When ip6frag_high_thresh bytes of memory is allocated for this purpose, the fragment handler will toss packets until ip6frag_low_thresh is reached. h](h)}(hip6frag_high_thresh - INTEGERh]hip6frag_high_thresh - INTEGER}(hjchhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM< hjcubj )}(hhh]j)}(hMaximum memory used to reassemble IPv6 fragments. When ip6frag_high_thresh bytes of memory is allocated for this purpose, the fragment handler will toss packets until ip6frag_low_thresh is reached.h]hMaximum memory used to reassemble IPv6 fragments. When ip6frag_high_thresh bytes of memory is allocated for this purpose, the fragment handler will toss packets until ip6frag_low_thresh is reached.}(hj%chhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM9 hj"cubah}(h]h ]h"]h$]h&]uh1j hjcubeh}(h]h ]h"]h$]h&]uh1hhhhM< hj cubh)}(h5ip6frag_low_thresh - INTEGER See ip6frag_high_thresh h](h)}(hip6frag_low_thresh - INTEGERh]hip6frag_low_thresh - INTEGER}(hjCchhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM? hj?cubj )}(hhh]j)}(hSee ip6frag_high_threshh]hSee ip6frag_high_thresh}(hjTchhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM? hjQcubah}(h]h ]h"]h$]h&]uh1j hj?cubeh}(h]h ]h"]h$]h&]uh1hhhhM? hj chhubh)}(hKip6frag_time - INTEGER Time in seconds to keep an IPv6 fragment in memory. h](h)}(hip6frag_time - INTEGERh]hip6frag_time - INTEGER}(hjrchhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMB hjncubj )}(hhh]j)}(h3Time in seconds to keep an IPv6 fragment in memory.h]h3Time in seconds to keep an IPv6 fragment in memory.}(hjchhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMB hjcubah}(h]h ]h"]h$]h&]uh1j hjncubeh}(h]h ]h"]h$]h&]uh1hhhhMB hj chhubh)}(h``conf/default/*``: Change the interface-specific default settings. These settings would be used during creating new interfaces. h](h)}(h``conf/default/*``:h](jF)}(h``conf/default/*``h]hconf/default/*}(hjchhhNhNubah}(h]h ]h"]h$]h&]uh1jFhjcubh:}(hjchhhNhNubeh}(h]h ]h"]h$]h&]uh1hhhhMH hjcubj )}(hhh](j)}(h/Change the interface-specific default settings.h]h/Change the interface-specific default settings.}(hjchhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhME hjcubj)}(hhubj )}(hhh](j)}(h-Learn default router in Router Advertisement.h]h-Learn default router in Router Advertisement.}(hjShhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjPhubj)}(hFunctional default:h]hFunctional default:}(hjahhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjPhubj )}(hH- enabled if accept_ra is enabled. - disabled if accept_ra is disabled. h]j;)}(hhh](j@)}(h enabled if accept_ra is enabled.h]j)}(hjxhh]h enabled if accept_ra is enabled.}(hjzhhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvhubah}(h]h ]h"]h$]h&]uh1j?hjshubj@)}(h#disabled if accept_ra is disabled. h]j)}(h"disabled if accept_ra is disabled.h]h"disabled if accept_ra is disabled.}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjhubah}(h]h ]h"]h$]h&]uh1j?hjshubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjohubah}(h]h ]h"]h$]h&]uh1j hhhM hjPhubeh}(h]h ]h"]h$]h&]uh1j hj>hubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXQra_defrtr_metric - UNSIGNED INTEGER Route metric for default route learned in Router Advertisement. This value will be assigned as metric for the default route learned via IPv6 Router Advertisement. Takes affect only if accept_ra_defrtr is enabled. Possible values: 1 to 0xFFFFFFFF Default: IP6_RT_PRIO_USER i.e. 1024. h](h)}(h#ra_defrtr_metric - UNSIGNED INTEGERh]h#ra_defrtr_metric - UNSIGNED INTEGER}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjhubj )}(hhh](j)}(hRoute metric for default route learned in Router Advertisement. This value will be assigned as metric for the default route learned via IPv6 Router Advertisement. Takes affect only if accept_ra_defrtr is enabled.h]hRoute metric for default route learned in Router Advertisement. This value will be assigned as metric for the default route learned via IPv6 Router Advertisement. Takes affect only if accept_ra_defrtr is enabled.}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjhubh)}(hhh]h)}(hGPossible values: 1 to 0xFFFFFFFF Default: IP6_RT_PRIO_USER i.e. 1024. h](h)}(hPossible values:h]hPossible values:}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjhubj )}(hhh](j)}(h1 to 0xFFFFFFFFh]h1 to 0xFFFFFFFF}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjhubj)}(h$Default: IP6_RT_PRIO_USER i.e. 1024.h]h$Default: IP6_RT_PRIO_USER i.e. 1024.}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjhubeh}(h]h ]h"]h$]h&]uh1j hjhubeh}(h]h ]h"]h$]h&]uh1hhhhM hjhubah}(h]h ]h"]h$]h&]uh1hhjhubeh}(h]h ]h"]h$]h&]uh1j hjhubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXaccept_ra_from_local - BOOLEAN Accept RA with source-address that is found on local machine if the RA is otherwise proper and able to be accepted. Default is to NOT accept these as it may be an un-intended network loop. Functional default: - enabled if accept_ra_from_local is enabled on a specific interface. - disabled if accept_ra_from_local is disabled on a specific interface. h](h)}(haccept_ra_from_local - BOOLEANh]haccept_ra_from_local - BOOLEAN}(hj6ihhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj2iubj )}(hhh](j)}(hsAccept RA with source-address that is found on local machine if the RA is otherwise proper and able to be accepted.h]hsAccept RA with source-address that is found on local machine if the RA is otherwise proper and able to be accepted.}(hjGihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjDiubj)}(hHDefault is to NOT accept these as it may be an un-intended network loop.h]hHDefault is to NOT accept these as it may be an un-intended network loop.}(hjUihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjDiubj)}(hFunctional default:h]hFunctional default:}(hjcihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjDiubj )}(h- enabled if accept_ra_from_local is enabled on a specific interface. - disabled if accept_ra_from_local is disabled on a specific interface. h]j;)}(hhh](j@)}(hCenabled if accept_ra_from_local is enabled on a specific interface.h]j)}(hCenabled if accept_ra_from_local is enabled on a specific interface.h]hCenabled if accept_ra_from_local is enabled on a specific interface.}(hj|ihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxiubah}(h]h ]h"]h$]h&]uh1j?hjuiubj@)}(hFdisabled if accept_ra_from_local is disabled on a specific interface. h]j)}(hEdisabled if accept_ra_from_local is disabled on a specific interface.h]hEdisabled if accept_ra_from_local is disabled on a specific interface.}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjiubah}(h]h ]h"]h$]h&]uh1j?hjuiubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjqiubah}(h]h ]h"]h$]h&]uh1j hhhM hjDiubeh}(h]h ]h"]h$]h&]uh1j hj2iubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_ra_min_hop_limit - INTEGER Minimum hop limit Information in Router Advertisement. Hop limit Information in Router Advertisement less than this variable shall be ignored. Default: 1 h](h)}(h!accept_ra_min_hop_limit - INTEGERh]h!accept_ra_min_hop_limit - INTEGER}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjiubj )}(hhh](j)}(h6Minimum hop limit Information in Router Advertisement.h]h6Minimum hop limit Information in Router Advertisement.}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjiubj)}(hWHop limit Information in Router Advertisement less than this variable shall be ignored.h]hWHop limit Information in Router Advertisement less than this variable shall be ignored.}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjiubj)}(h Default: 1h]h Default: 1}(hjihhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjiubeh}(h]h ]h"]h$]h&]uh1j hjiubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_ra_min_lft - INTEGER Minimum acceptable lifetime value in Router Advertisement. RA sections with a lifetime less than this value shall be ignored. Zero lifetimes stay unaffected. Default: 0 h](h)}(haccept_ra_min_lft - INTEGERh]haccept_ra_min_lft - INTEGER}(hjjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj jubj )}(hhh](j)}(h:Minimum acceptable lifetime value in Router Advertisement.h]h:Minimum acceptable lifetime value in Router Advertisement.}(hj jhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjjubj)}(hbRA sections with a lifetime less than this value shall be ignored. Zero lifetimes stay unaffected.h]hbRA sections with a lifetime less than this value shall be ignored. Zero lifetimes stay unaffected.}(hj.jhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjjubj)}(h Default: 0h]h Default: 0}(hj1 (enabled) - the PIO valid lifetime will always be honored. h]j)}(h=1 (enabled) - the PIO valid lifetime will always be honored.h]h=1 (enabled) - the PIO valid lifetime will always be honored.}(hj%khhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj!kubah}(h]h ]h"]h$]h&]uh1j?hjkubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj?khhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjjubeh}(h]h ]h"]h$]h&]uh1j hjjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hX:ra_honor_pio_pflag - BOOLEAN The Prefix Information Option P-flag indicates the network can allocate a unique IPv6 prefix per client using DHCPv6-PD. This sysctl can be enabled when a userspace DHCPv6-PD client is running to cause the P-flag to take effect: i.e. the P-flag suppresses any effects of the A-flag within the same PIO. For a given PIO, P=1 and A=1 is treated as A=0. Possible values: - 0 (disabled) - the P-flag is ignored. - 1 (enabled) - the P-flag will disable SLAAC autoconfiguration for the given Prefix Information Option. Default: 0 (disabled) h](h)}(hra_honor_pio_pflag - BOOLEANh]hra_honor_pio_pflag - BOOLEAN}(hj]khhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjYkubj )}(hhh](j)}(hX^The Prefix Information Option P-flag indicates the network can allocate a unique IPv6 prefix per client using DHCPv6-PD. This sysctl can be enabled when a userspace DHCPv6-PD client is running to cause the P-flag to take effect: i.e. the P-flag suppresses any effects of the A-flag within the same PIO. For a given PIO, P=1 and A=1 is treated as A=0.h]hX^The Prefix Information Option P-flag indicates the network can allocate a unique IPv6 prefix per client using DHCPv6-PD. This sysctl can be enabled when a userspace DHCPv6-PD client is running to cause the P-flag to take effect: i.e. the P-flag suppresses any effects of the A-flag within the same PIO. For a given PIO, P=1 and A=1 is treated as A=0.}(hjnkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkkubj)}(hPossible values:h]hPossible values:}(hj|khhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkkubj;)}(hhh](j@)}(h%0 (disabled) - the P-flag is ignored.h]j)}(hjkh]h%0 (disabled) - the P-flag is ignored.}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkubah}(h]h ]h"]h$]h&]uh1j?hjkubj@)}(hh1 (enabled) - the P-flag will disable SLAAC autoconfiguration for the given Prefix Information Option. h]j)}(hg1 (enabled) - the P-flag will disable SLAAC autoconfiguration for the given Prefix Information Option.h]hg1 (enabled) - the P-flag will disable SLAAC autoconfiguration for the given Prefix Information Option.}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkubah}(h]h ]h"]h$]h&]uh1j?hjkubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjkkubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkkubeh}(h]h ]h"]h$]h&]uh1j hjYkubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXaccept_ra_rt_info_min_plen - INTEGER Minimum prefix length of Route Information in RA. Route Information w/ prefix smaller than this variable shall be ignored. Functional default: * 0 if accept_ra_rtr_pref is enabled. * -1 if accept_ra_rtr_pref is disabled. h](h)}(h$accept_ra_rt_info_min_plen - INTEGERh]h$accept_ra_rt_info_min_plen - INTEGER}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjkubj )}(hhh](j)}(h1Minimum prefix length of Route Information in RA.h]h1Minimum prefix length of Route Information in RA.}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkubj)}(hHRoute Information w/ prefix smaller than this variable shall be ignored.h]hHRoute Information w/ prefix smaller than this variable shall be ignored.}(hjkhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkubj)}(hFunctional default:h]hFunctional default:}(hj lhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjkubj )}(hN* 0 if accept_ra_rtr_pref is enabled. * -1 if accept_ra_rtr_pref is disabled. h]j;)}(hhh](j@)}(h#0 if accept_ra_rtr_pref is enabled.h]j)}(hj$lh]h#0 if accept_ra_rtr_pref is enabled.}(hj&lhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj"lubah}(h]h ]h"]h$]h&]uh1j?hjlubj@)}(h&-1 if accept_ra_rtr_pref is disabled. h]j)}(h%-1 if accept_ra_rtr_pref is disabled.h]h%-1 if accept_ra_rtr_pref is disabled.}(hj=lhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj9lubah}(h]h ]h"]h$]h&]uh1j?hjlubeh}(h]h ]h"]h$]h&]jv*uh1j:hhhM hjlubah}(h]h ]h"]h$]h&]uh1j hhhM hjkubeh}(h]h ]h"]h$]h&]uh1j hjkubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXaccept_ra_rt_info_max_plen - INTEGER Maximum prefix length of Route Information in RA. Route Information w/ prefix larger than this variable shall be ignored. Functional default: * 0 if accept_ra_rtr_pref is enabled. * -1 if accept_ra_rtr_pref is disabled. h](h)}(h$accept_ra_rt_info_max_plen - INTEGERh]h$accept_ra_rt_info_max_plen - INTEGER}(hjnlhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjjlubj )}(hhh](j)}(h1Maximum prefix length of Route Information in RA.h]h1Maximum prefix length of Route Information in RA.}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj|lubj)}(hGRoute Information w/ prefix larger than this variable shall be ignored.h]hGRoute Information w/ prefix larger than this variable shall be ignored.}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj|lubj)}(hFunctional default:h]hFunctional default:}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj|lubj )}(hN* 0 if accept_ra_rtr_pref is enabled. * -1 if accept_ra_rtr_pref is disabled. h]j;)}(hhh](j@)}(h#0 if accept_ra_rtr_pref is enabled.h]j)}(hjlh]h#0 if accept_ra_rtr_pref is enabled.}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjlubah}(h]h ]h"]h$]h&]uh1j?hjlubj@)}(h&-1 if accept_ra_rtr_pref is disabled. h]j)}(h%-1 if accept_ra_rtr_pref is disabled.h]h%-1 if accept_ra_rtr_pref is disabled.}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjlubah}(h]h ]h"]h$]h&]uh1j?hjlubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM hjlubah}(h]h ]h"]h$]h&]uh1j hhhM hj|lubeh}(h]h ]h"]h$]h&]uh1j hjjlubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_ra_rtr_pref - BOOLEAN Accept Router Preference in RA. Functional default: - enabled if accept_ra is enabled. - disabled if accept_ra is disabled. h](h)}(haccept_ra_rtr_pref - BOOLEANh]haccept_ra_rtr_pref - BOOLEAN}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjlubj )}(hhh](j)}(hAccept Router Preference in RA.h]hAccept Router Preference in RA.}(hj mhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj mubj)}(hFunctional default:h]hFunctional default:}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj mubj )}(hH- enabled if accept_ra is enabled. - disabled if accept_ra is disabled. h]j;)}(hhh](j@)}(h enabled if accept_ra is enabled.h]j)}(hj1mh]h enabled if accept_ra is enabled.}(hj3mhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj/mubah}(h]h ]h"]h$]h&]uh1j?hj,mubj@)}(h#disabled if accept_ra is disabled. h]j)}(h"disabled if accept_ra is disabled.h]h"disabled if accept_ra is disabled.}(hjJmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjFmubah}(h]h ]h"]h$]h&]uh1j?hj,mubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj(mubah}(h]h ]h"]h$]h&]uh1j hhhM hj mubeh}(h]h ]h"]h$]h&]uh1j hjlubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_ra_mtu - BOOLEAN Apply the MTU value specified in RA option 5 (RFC4861). If disabled, the MTU specified in the RA will be ignored. Functional default: - enabled if accept_ra is enabled. - disabled if accept_ra is disabled. h](h)}(haccept_ra_mtu - BOOLEANh]haccept_ra_mtu - BOOLEAN}(hjzmhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjvmubj )}(hhh](j)}(hqApply the MTU value specified in RA option 5 (RFC4861). If disabled, the MTU specified in the RA will be ignored.h]hqApply the MTU value specified in RA option 5 (RFC4861). If disabled, the MTU specified in the RA will be ignored.}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjmubj)}(hFunctional default:h]hFunctional default:}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjmubj )}(hH- enabled if accept_ra is enabled. - disabled if accept_ra is disabled. h]j;)}(hhh](j@)}(h enabled if accept_ra is enabled.h]j)}(hjmh]h enabled if accept_ra is enabled.}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjmubah}(h]h ]h"]h$]h&]uh1j?hjmubj@)}(h#disabled if accept_ra is disabled. h]j)}(h"disabled if accept_ra is disabled.h]h"disabled if accept_ra is disabled.}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjmubah}(h]h ]h"]h$]h&]uh1j?hjmubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjmubah}(h]h ]h"]h$]h&]uh1j hhhM hjmubeh}(h]h ]h"]h$]h&]uh1j hjvmubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_redirects - BOOLEAN Accept Redirects. Functional default: - enabled if local forwarding is disabled. - disabled if local forwarding is enabled. h](h)}(haccept_redirects - BOOLEANh]haccept_redirects - BOOLEAN}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjmubj )}(hhh](j)}(hAccept Redirects.h]hAccept Redirects.}(hj nhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjnubj)}(hFunctional default:h]hFunctional default:}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjnubj )}(hV- enabled if local forwarding is disabled. - disabled if local forwarding is enabled. h]j;)}(hhh](j@)}(h(enabled if local forwarding is disabled.h]j)}(hj/nh]h(enabled if local forwarding is disabled.}(hj1nhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj-nubah}(h]h ]h"]h$]h&]uh1j?hj*nubj@)}(h)disabled if local forwarding is enabled. h]j)}(h(disabled if local forwarding is enabled.h]h(disabled if local forwarding is enabled.}(hjHnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjDnubah}(h]h ]h"]h$]h&]uh1j?hj*nubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj&nubah}(h]h ]h"]h$]h&]uh1j hhhM hjnubeh}(h]h ]h"]h$]h&]uh1j hjmubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(haccept_source_route - INTEGER Accept source routing (routing extension header). - >= 0: Accept only routing header type 2. - < 0: Do not accept routing header. Default: 0 h](h)}(haccept_source_route - INTEGERh]haccept_source_route - INTEGER}(hjxnhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM& hjtnubj )}(hhh](j)}(h1Accept source routing (routing extension header).h]h1Accept source routing (routing extension header).}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM! hjnubj;)}(hhh](j@)}(h(>= 0: Accept only routing header type 2.h]j)}(hjnh]h(>= 0: Accept only routing header type 2.}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM# hjnubah}(h]h ]h"]h$]h&]uh1j?hjnubj@)}(h#< 0: Do not accept routing header. h]j)}(h"< 0: Do not accept routing header.h]h"< 0: Do not accept routing header.}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$ hjnubah}(h]h ]h"]h$]h&]uh1j?hjnubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM# hjnubj)}(h Default: 0h]h Default: 0}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM& hjnubeh}(h]h ]h"]h$]h&]uh1j hjtnubeh}(h]h ]h"]h$]h&]uh1hhhhM& hj chhubh)}(hautoconf - BOOLEAN Autoconfigure addresses using Prefix Information in Router Advertisements. Functional default: - enabled if accept_ra_pinfo is enabled. - disabled if accept_ra_pinfo is disabled. h](h)}(hautoconf - BOOLEANh]hautoconf - BOOLEAN}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM/ hjnubj )}(hhh](j)}(hJAutoconfigure addresses using Prefix Information in Router Advertisements.h]hJAutoconfigure addresses using Prefix Information in Router Advertisements.}(hjnhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM) hjnubj)}(hFunctional default:h]hFunctional default:}(hj ohhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM, hjnubj )}(hT- enabled if accept_ra_pinfo is enabled. - disabled if accept_ra_pinfo is disabled. h]j;)}(hhh](j@)}(h&enabled if accept_ra_pinfo is enabled.h]j)}(hj#oh]h&enabled if accept_ra_pinfo is enabled.}(hj%ohhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM. hj!oubah}(h]h ]h"]h$]h&]uh1j?hjoubj@)}(h)disabled if accept_ra_pinfo is disabled. h]j)}(h(disabled if accept_ra_pinfo is disabled.h]h(disabled if accept_ra_pinfo is disabled.}(hj hjoubj )}(h/- 0 Forwarding disabled - 1 Forwarding enabled h]j;)}(hhh](j@)}(h0 Forwarding disabledh]j)}(hjoh]h0 Forwarding disabled}(hjohhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM@ hjoubah}(h]h ]h"]h$]h&]uh1j?hjoubj@)}(h1 Forwarding enabled h]j)}(h1 Forwarding enabledh]h1 Forwarding enabled}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMA hj pubah}(h]h ]h"]h$]h&]uh1j?hjoubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM@ hjoubah}(h]h ]h"]h$]h&]uh1j hhhM@ hjoubj)}(h**FALSE (0)**:h](hstrong)}(h **FALSE (0)**h]h FALSE (0)}(hj6phhhNhNubah}(h]h ]h"]h$]h&]uh1j4phj0pubh:}(hj0phhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMC hjoubj)}(h3By default, Host behaviour is assumed. This means:h]h3By default, Host behaviour is assumed. This means:}(hjNphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhME hjoubj?)}(hhh](j@)}(h5IsRouter flag is not set in Neighbour Advertisements.h]j)}(hjaph]h5IsRouter flag is not set in Neighbour Advertisements.}(hjcphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMG hj_pubah}(h]h ]h"]h$]h&]uh1j?hj\pubj@)}(h>If accept_ra is TRUE (default), transmit Router Solicitations.h]j)}(h>If accept_ra is TRUE (default), transmit Router Solicitations.h]h>If accept_ra is TRUE (default), transmit Router Solicitations.}(hjzphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMH hjvpubah}(h]h ]h"]h$]h&]uh1j?hj\pubj@)}(hXIf accept_ra is TRUE (default), accept Router Advertisements (and do autoconfiguration).h]j)}(hXIf accept_ra is TRUE (default), accept Router Advertisements (and do autoconfiguration).h]hXIf accept_ra is TRUE (default), accept Router Advertisements (and do autoconfiguration).}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMJ hjpubah}(h]h ]h"]h$]h&]uh1j?hj\pubj@)}(h9If accept_redirects is TRUE (default), accept Redirects. h]j)}(h8If accept_redirects is TRUE (default), accept Redirects.h]h8If accept_redirects is TRUE (default), accept Redirects.}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhML hjpubah}(h]h ]h"]h$]h&]uh1j?hj\pubeh}(h]h ]h"]h$]h&]jarabicjhj.uh1j>hjoubj)}(h **TRUE (1)**:h](j5p)}(h **TRUE (1)**h]hTRUE (1)}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1j4phjpubh:}(hjphhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMN hjoubj)}(hkIf local forwarding is enabled, Router behaviour is assumed. This means exactly the reverse from the above:h]hkIf local forwarding is enabled, Router behaviour is assumed. This means exactly the reverse from the above:}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMP hjoubj?)}(hhh](j@)}(h1IsRouter flag is set in Neighbour Advertisements.h]j)}(hjph]h1IsRouter flag is set in Neighbour Advertisements.}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMS hjpubah}(h]h ]h"]h$]h&]uh1j?hjpubj@)}(h8Router Solicitations are not sent unless accept_ra is 2.h]j)}(hj qh]h8Router Solicitations are not sent unless accept_ra is 2.}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMT hj qubah}(h]h ]h"]h$]h&]uh1j?hjpubj@)}(h8Router Advertisements are ignored unless accept_ra is 2.h]j)}(hj#qh]h8Router Advertisements are ignored unless accept_ra is 2.}(hj%qhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMU hj!qubah}(h]h ]h"]h$]h&]uh1j?hjpubj@)}(hRedirects are ignored. h]j)}(hRedirects are ignored.h]hRedirects are ignored.}(hjhjoubj)}(hXDefault: 0 (disabled) if global forwarding is disabled (default), otherwise 1 (enabled).h]hXDefault: 0 (disabled) if global forwarding is disabled (default), otherwise 1 (enabled).}(hjVqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMX hjoubeh}(h]h ]h"]h$]h&]uh1j hjoubeh}(h]h ]h"]h$]h&]uh1hhhhMY hj chhubh)}(h;hop_limit - INTEGER Default Hop Limit to set. Default: 64 h](h)}(hhop_limit - INTEGERh]hhop_limit - INTEGER}(hjtqhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM^ hjpqubj )}(hhh](j)}(hDefault Hop Limit to set.h]hDefault Hop Limit to set.}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM\ hjqubj)}(h Default: 64h]h Default: 64}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM^ hjqubeh}(h]h ]h"]h$]h&]uh1j hjpqubeh}(h]h ]h"]h$]h&]uh1hhhhM^ hj chhubh)}(hSmtu - INTEGER Default Maximum Transfer Unit Default: 1280 (IPv6 required minimum) h](h)}(h mtu - INTEGERh]h mtu - INTEGER}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMc hjqubj )}(hhh](j)}(hDefault Maximum Transfer Unith]hDefault Maximum Transfer Unit}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMa hjqubj)}(h%Default: 1280 (IPv6 required minimum)h]h%Default: 1280 (IPv6 required minimum)}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMc hjqubeh}(h]h ]h"]h$]h&]uh1j hjqubeh}(h]h ]h"]h$]h&]uh1hhhhMc hj chhubh)}(hip_nonlocal_bind - BOOLEAN If enabled, allows processes to bind() to non-local IPv6 addresses, which can be quite useful - but may break some applications. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hip_nonlocal_bind - BOOLEANh]hip_nonlocal_bind - BOOLEAN}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMn hjqubj )}(hhh](j)}(hIf enabled, allows processes to bind() to non-local IPv6 addresses, which can be quite useful - but may break some applications.h]hIf enabled, allows processes to bind() to non-local IPv6 addresses, which can be quite useful - but may break some applications.}(hjqhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMf hjqubj)}(hPossible values:h]hPossible values:}(hj rhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMi hjqubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj rh]h 0 (disabled)}(hj"rhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMk hjrubah}(h]h ]h"]h$]h&]uh1j?hjrubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj9rhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMl hj5rubah}(h]h ]h"]h$]h&]uh1j?hjrubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMk hjqubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjSrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMn hjqubeh}(h]h ]h"]h$]h&]uh1j hjqubeh}(h]h ]h"]h$]h&]uh1hhhhMn hj chhubh)}(hxrouter_probe_interval - INTEGER Minimum interval (in seconds) between Router Probing described in RFC4191. Default: 60 h](h)}(hrouter_probe_interval - INTEGERh]hrouter_probe_interval - INTEGER}(hjqrhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMt hjmrubj )}(hhh](j)}(hJMinimum interval (in seconds) between Router Probing described in RFC4191.h]hJMinimum interval (in seconds) between Router Probing described in RFC4191.}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMq hjrubj)}(h Default: 60h]h Default: 60}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMt hjrubeh}(h]h ]h"]h$]h&]uh1j hjmrubeh}(h]h ]h"]h$]h&]uh1hhhhMt hj chhubh)}(hrouter_solicitation_delay - INTEGER Number of seconds to wait after interface is brought up before sending Router Solicitations. Default: 1 h](h)}(h#router_solicitation_delay - INTEGERh]h#router_solicitation_delay - INTEGER}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMz hjrubj )}(hhh](j)}(h\Number of seconds to wait after interface is brought up before sending Router Solicitations.h]h\Number of seconds to wait after interface is brought up before sending Router Solicitations.}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMw hjrubj)}(h Default: 1h]h Default: 1}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMz hjrubeh}(h]h ]h"]h$]h&]uh1j hjrubeh}(h]h ]h"]h$]h&]uh1hhhhMz hj chhubh)}(hkrouter_solicitation_interval - INTEGER Number of seconds to wait between Router Solicitations. Default: 4 h](h)}(h&router_solicitation_interval - INTEGERh]h&router_solicitation_interval - INTEGER}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjrubj )}(hhh](j)}(h7Number of seconds to wait between Router Solicitations.h]h7Number of seconds to wait between Router Solicitations.}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM} hjrubj)}(h Default: 4h]h Default: 4}(hj shhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjrubeh}(h]h ]h"]h$]h&]uh1j hjrubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hyrouter_solicitations - INTEGER Number of Router Solicitations to send until assuming no routers are present. Default: 3 h](h)}(hrouter_solicitations - INTEGERh]hrouter_solicitations - INTEGER}(hj(shhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj$subj )}(hhh](j)}(hMNumber of Router Solicitations to send until assuming no routers are present.h]hMNumber of Router Solicitations to send until assuming no routers are present.}(hj9shhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6subj)}(h Default: 3h]h Default: 3}(hjGshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj6subeh}(h]h ]h"]h$]h&]uh1j hj$subeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXuse_oif_addrs_only - BOOLEAN When enabled, the candidate source addresses for destinations routed via this interface are restricted to the set of addresses configured on this interface (vis. RFC 6724, section 4). Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(huse_oif_addrs_only - BOOLEANh]huse_oif_addrs_only - BOOLEAN}(hjeshhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjasubj )}(hhh](j)}(hWhen enabled, the candidate source addresses for destinations routed via this interface are restricted to the set of addresses configured on this interface (vis. RFC 6724, section 4).h]hWhen enabled, the candidate source addresses for destinations routed via this interface are restricted to the set of addresses configured on this interface (vis. RFC 6724, section 4).}(hjvshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjssubj)}(hPossible values:h]hPossible values:}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjssubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjsh]h 0 (disabled)}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjsubah}(h]h ]h"]h$]h&]uh1j?hjsubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjsubah}(h]h ]h"]h$]h&]uh1j?hjsubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjssubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjssubeh}(h]h ]h"]h$]h&]uh1j hjasubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXuse_tempaddr - INTEGER Preference for Privacy Extensions (RFC3041). * <= 0 : disable Privacy Extensions * == 1 : enable Privacy Extensions, but prefer public addresses over temporary addresses. * > 1 : enable Privacy Extensions and prefer temporary addresses over public addresses. Default: * 0 (for most devices) * -1 (for point-to-point devices and loopback devices) h](h)}(huse_tempaddr - INTEGERh]huse_tempaddr - INTEGER}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjsubj )}(hhh](j)}(h,Preference for Privacy Extensions (RFC3041).h]h,Preference for Privacy Extensions (RFC3041).}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjsubj )}(h* <= 0 : disable Privacy Extensions * == 1 : enable Privacy Extensions, but prefer public addresses over temporary addresses. * > 1 : enable Privacy Extensions and prefer temporary addresses over public addresses. h]j;)}(hhh](j@)}(h!<= 0 : disable Privacy Extensionsh]j)}(hjth]h!<= 0 : disable Privacy Extensions}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjtubah}(h]h ]h"]h$]h&]uh1j?hj tubj@)}(hW== 1 : enable Privacy Extensions, but prefer public addresses over temporary addresses.h]j)}(hW== 1 : enable Privacy Extensions, but prefer public addresses over temporary addresses.h]hW== 1 : enable Privacy Extensions, but prefer public addresses over temporary addresses.}(hj)thhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj%tubah}(h]h ]h"]h$]h&]uh1j?hj tubj@)}(hW> 1 : enable Privacy Extensions and prefer temporary addresses over public addresses. h]j)}(hV> 1 : enable Privacy Extensions and prefer temporary addresses over public addresses.h]hV> 1 : enable Privacy Extensions and prefer temporary addresses over public addresses.}(hjAthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj=tubah}(h]h ]h"]h$]h&]uh1j?hj tubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM hjtubah}(h]h ]h"]h$]h&]uh1j hhhM hjsubj)}(hDefault:h]hDefault:}(hjathhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjsubj )}(hN* 0 (for most devices) * -1 (for point-to-point devices and loopback devices) h]j;)}(hhh](j@)}(h0 (for most devices)h]j)}(hjxth]h0 (for most devices)}(hjzthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvtubah}(h]h ]h"]h$]h&]uh1j?hjstubj@)}(h5-1 (for point-to-point devices and loopback devices) h]j)}(h4-1 (for point-to-point devices and loopback devices)h]h4-1 (for point-to-point devices and loopback devices)}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjtubah}(h]h ]h"]h$]h&]uh1j?hjstubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM hjotubah}(h]h ]h"]h$]h&]uh1j hhhM hjsubeh}(h]h ]h"]h$]h&]uh1j hjsubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(htemp_valid_lft - INTEGER valid lifetime (in seconds) for temporary addresses. If less than the minimum required lifetime (typically 5-7 seconds), temporary addresses will not be created. Default: 172800 (2 days) h](h)}(htemp_valid_lft - INTEGERh]htemp_valid_lft - INTEGER}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjtubj )}(hhh](j)}(hvalid lifetime (in seconds) for temporary addresses. If less than the minimum required lifetime (typically 5-7 seconds), temporary addresses will not be created.h]hvalid lifetime (in seconds) for temporary addresses. If less than the minimum required lifetime (typically 5-7 seconds), temporary addresses will not be created.}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjtubj)}(hDefault: 172800 (2 days)h]hDefault: 172800 (2 days)}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjtubeh}(h]h ]h"]h$]h&]uh1j hjtubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXUtemp_prefered_lft - INTEGER Preferred lifetime (in seconds) for temporary addresses. If temp_prefered_lft is less than the minimum required lifetime (typically 5-7 seconds), the preferred lifetime is the minimum required. If temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime is temp_valid_lft. Default: 86400 (1 day) h](h)}(htemp_prefered_lft - INTEGERh]htemp_prefered_lft - INTEGER}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjtubj )}(hhh](j)}(hX Preferred lifetime (in seconds) for temporary addresses. If temp_prefered_lft is less than the minimum required lifetime (typically 5-7 seconds), the preferred lifetime is the minimum required. If temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime is temp_valid_lft.h]hX Preferred lifetime (in seconds) for temporary addresses. If temp_prefered_lft is less than the minimum required lifetime (typically 5-7 seconds), the preferred lifetime is the minimum required. If temp_prefered_lft is greater than temp_valid_lft, the preferred lifetime is temp_valid_lft.}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj uubj)}(hDefault: 86400 (1 day)h]hDefault: 86400 (1 day)}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj uubeh}(h]h ]h"]h$]h&]uh1j hjtubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hkeep_addr_on_down - INTEGER Keep all IPv6 addresses on an interface down event. If set static global addresses with no expiration time are not flushed. * >0 : enabled * 0 : system default * <0 : disabled Default: 0 (addresses are removed) h](h)}(hkeep_addr_on_down - INTEGERh]hkeep_addr_on_down - INTEGER}(hj;uhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj7uubj )}(hhh](j)}(h{Keep all IPv6 addresses on an interface down event. If set static global addresses with no expiration time are not flushed.h]h{Keep all IPv6 addresses on an interface down event. If set static global addresses with no expiration time are not flushed.}(hjLuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjIuubj;)}(hhh](j@)}(h >0 : enabledh]j)}(hj_uh]h >0 : enabled}(hjauhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]uubah}(h]h ]h"]h$]h&]uh1j?hjZuubj@)}(h0 : system defaulth]j)}(hjvuh]h0 : system default}(hjxuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjtuubah}(h]h ]h"]h$]h&]uh1j?hjZuubj@)}(h<0 : disabled h]j)}(h <0 : disabledh]h <0 : disabled}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjuubah}(h]h ]h"]h$]h&]uh1j?hjZuubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM hjIuubj)}(h"Default: 0 (addresses are removed)h]h"Default: 0 (addresses are removed)}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjIuubeh}(h]h ]h"]h$]h&]uh1j hj7uubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hmax_desync_factor - INTEGER Maximum value for DESYNC_FACTOR, which is a random value that ensures that clients don't synchronize with each other and generate new addresses at exactly the same time. value is in seconds. Default: 600 h](h)}(hmax_desync_factor - INTEGERh]hmax_desync_factor - INTEGER}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjuubj )}(hhh](j)}(hMaximum value for DESYNC_FACTOR, which is a random value that ensures that clients don't synchronize with each other and generate new addresses at exactly the same time. value is in seconds.h]hMaximum value for DESYNC_FACTOR, which is a random value that ensures that clients don’t synchronize with each other and generate new addresses at exactly the same time. value is in seconds.}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjuubj)}(h Default: 600h]h Default: 600}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjuubeh}(h]h ]h"]h$]h&]uh1j hjuubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXregen_min_advance - INTEGER How far in advance (in seconds), at minimum, to create a new temporary address before the current one is deprecated. This value is added to the amount of time that may be required for duplicate address detection to determine when to create a new address. Linux permits setting this value to less than the default of 2 seconds, but a value less than 2 does not conform to RFC 8981. Default: 2 h](h)}(hregen_min_advance - INTEGERh]hregen_min_advance - INTEGER}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjvubj )}(hhh](j)}(hX|How far in advance (in seconds), at minimum, to create a new temporary address before the current one is deprecated. This value is added to the amount of time that may be required for duplicate address detection to determine when to create a new address. Linux permits setting this value to less than the default of 2 seconds, but a value less than 2 does not conform to RFC 8981.h]hX|How far in advance (in seconds), at minimum, to create a new temporary address before the current one is deprecated. This value is added to the amount of time that may be required for duplicate address detection to determine when to create a new address. Linux permits setting this value to less than the default of 2 seconds, but a value less than 2 does not conform to RFC 8981.}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubj)}(h Default: 2h]h Default: 2}(hj#vhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubeh}(h]h ]h"]h$]h&]uh1j hjvubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hzregen_max_retry - INTEGER Number of attempts before give up attempting to generate valid temporary addresses. Default: 5 h](h)}(hregen_max_retry - INTEGERh]hregen_max_retry - INTEGER}(hjAvhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj=vubj )}(hhh](j)}(hSNumber of attempts before give up attempting to generate valid temporary addresses.h]hSNumber of attempts before give up attempting to generate valid temporary addresses.}(hjRvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjOvubj)}(h Default: 5h]h Default: 5}(hj`vhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjOvubeh}(h]h ]h"]h$]h&]uh1j hj=vubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hX+max_addresses - INTEGER Maximum number of autoconfigured addresses per interface. Setting to zero disables the limitation. It is not recommended to set this value too large (or to zero) because it would be an easy way to crash the kernel by allowing too many addresses to be created. Default: 16 h](h)}(hmax_addresses - INTEGERh]hmax_addresses - INTEGER}(hj~vhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjzvubj )}(hhh](j)}(hXMaximum number of autoconfigured addresses per interface. Setting to zero disables the limitation. It is not recommended to set this value too large (or to zero) because it would be an easy way to crash the kernel by allowing too many addresses to be created.h]hXMaximum number of autoconfigured addresses per interface. Setting to zero disables the limitation. It is not recommended to set this value too large (or to zero) because it would be an easy way to crash the kernel by allowing too many addresses to be created.}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubj)}(h Default: 16h]h Default: 16}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubeh}(h]h ]h"]h$]h&]uh1j hjzvubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXfdisable_ipv6 - BOOLEAN Disable IPv6 operation. If accept_dad is set to 2, this value will be dynamically set to TRUE if DAD fails for the link-local address. Default: FALSE (enable IPv6 operation) When this value is changed from 1 to 0 (IPv6 is being enabled), it will dynamically create a link-local address on the given interface and start Duplicate Address Detection, if necessary. When this value is changed from 0 to 1 (IPv6 is being disabled), it will dynamically delete all addresses and routes on the given interface. From now on it will not possible to add addresses/routes to the selected interface. h](h)}(hdisable_ipv6 - BOOLEANh]hdisable_ipv6 - BOOLEAN}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjvubj )}(hhh](j)}(hDisable IPv6 operation. If accept_dad is set to 2, this value will be dynamically set to TRUE if DAD fails for the link-local address.h]hDisable IPv6 operation. If accept_dad is set to 2, this value will be dynamically set to TRUE if DAD fails for the link-local address.}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubj)}(h&Default: FALSE (enable IPv6 operation)h]h&Default: FALSE (enable IPv6 operation)}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubj)}(hWhen this value is changed from 1 to 0 (IPv6 is being enabled), it will dynamically create a link-local address on the given interface and start Duplicate Address Detection, if necessary.h]hWhen this value is changed from 1 to 0 (IPv6 is being enabled), it will dynamically create a link-local address on the given interface and start Duplicate Address Detection, if necessary.}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubj)}(hWhen this value is changed from 0 to 1 (IPv6 is being disabled), it will dynamically delete all addresses and routes on the given interface. From now on it will not possible to add addresses/routes to the selected interface.h]hWhen this value is changed from 0 to 1 (IPv6 is being disabled), it will dynamically delete all addresses and routes on the given interface. From now on it will not possible to add addresses/routes to the selected interface.}(hjvhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjvubeh}(h]h ]h"]h$]h&]uh1j hjvubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXaccept_dad - INTEGER Whether to accept DAD (Duplicate Address Detection). == ============================================================== 0 Disable DAD 1 Enable DAD (default) 2 Enable DAD, and disable IPv6 operation if MAC-based duplicate link-local address has been found. == ============================================================== DAD operation and mode on a given interface will be selected according to the maximum value of conf/{all,interface}/accept_dad. h](h)}(haccept_dad - INTEGERh]haccept_dad - INTEGER}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjwubj )}(hhh](j)}(h4Whether to accept DAD (Duplicate Address Detection).h]h4Whether to accept DAD (Duplicate Address Detection).}(hj%whhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj"wubj )}(hX== ============================================================== 0 Disable DAD 1 Enable DAD (default) 2 Enable DAD, and disable IPv6 operation if MAC-based duplicate link-local address has been found. == ============================================================== h]j)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhj:wubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthK>uh1jhj:wubj)}(hhh](j)}(hhh](j)}(hhh]j)}(hjh]h0}(hjZwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjWwubah}(h]h ]h"]h$]h&]uh1jhjTwubj)}(hhh]j)}(h Disable DADh]h Disable DAD}(hjpwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjmwubah}(h]h ]h"]h$]h&]uh1jhjTwubeh}(h]h ]h"]h$]h&]uh1jhjQwubj)}(hhh](j)}(hhh]j)}(hjh]h1}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjwubah}(h]h ]h"]h$]h&]uh1jhjwubj)}(hhh]j)}(hEnable DAD (default)h]hEnable DAD (default)}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjwubah}(h]h ]h"]h$]h&]uh1jhjwubeh}(h]h ]h"]h$]h&]uh1jhjQwubj)}(hhh](j)}(hhh]j)}(hjmh]h2}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjwubah}(h]h ]h"]h$]h&]uh1jhjwubj)}(hhh]j)}(h`Enable DAD, and disable IPv6 operation if MAC-based duplicate link-local address has been found.h]h`Enable DAD, and disable IPv6 operation if MAC-based duplicate link-local address has been found.}(hjwhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjwubah}(h]h ]h"]h$]h&]uh1jhjwubeh}(h]h ]h"]h$]h&]uh1jhjQwubeh}(h]h ]h"]h$]h&]uh1jhj:wubeh}(h]h ]h"]h$]h&]colsKuh1jhj7wubah}(h]h ]h"]h$]h&]uh1jhj3wubah}(h]h ]h"]h$]h&]uh1j hhhM hj"wubj)}(hDAD operation and mode on a given interface will be selected according to the maximum value of conf/{all,interface}/accept_dad.h]hDAD operation and mode on a given interface will be selected according to the maximum value of conf/{all,interface}/accept_dad.}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj"wubeh}(h]h ]h"]h$]h&]uh1j hjwubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXvforce_tllao - BOOLEAN Enable sending the target link-layer address option even when responding to a unicast neighbor solicitation. Default: FALSE Quoting from RFC 2461, section 4.4, Target link-layer address: "The option MUST be included for multicast solicitations in order to avoid infinite Neighbor Solicitation "recursion" when the peer node does not have a cache entry to return a Neighbor Advertisements message. When responding to unicast solicitations, the option can be omitted since the sender of the solicitation has the correct link- layer address; otherwise it would not have be able to send the unicast solicitation in the first place. However, including the link-layer address in this case adds little overhead and eliminates a potential race condition where the sender deletes the cached link-layer address prior to receiving a response to a previous solicitation." h](h)}(hforce_tllao - BOOLEANh]hforce_tllao - BOOLEAN}(hj-xhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj)xubj )}(hhh](j)}(hlEnable sending the target link-layer address option even when responding to a unicast neighbor solicitation.h]hlEnable sending the target link-layer address option even when responding to a unicast neighbor solicitation.}(hj>xhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj;xubj)}(hDefault: FALSEh]hDefault: FALSE}(hjLxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj;xubj)}(h>Quoting from RFC 2461, section 4.4, Target link-layer address:h]h>Quoting from RFC 2461, section 4.4, Target link-layer address:}(hjZxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj;xubj)}(hX"The option MUST be included for multicast solicitations in order to avoid infinite Neighbor Solicitation "recursion" when the peer node does not have a cache entry to return a Neighbor Advertisements message. When responding to unicast solicitations, the option can be omitted since the sender of the solicitation has the correct link- layer address; otherwise it would not have be able to send the unicast solicitation in the first place. However, including the link-layer address in this case adds little overhead and eliminates a potential race condition where the sender deletes the cached link-layer address prior to receiving a response to a previous solicitation."h]hX“The option MUST be included for multicast solicitations in order to avoid infinite Neighbor Solicitation “recursion” when the peer node does not have a cache entry to return a Neighbor Advertisements message. When responding to unicast solicitations, the option can be omitted since the sender of the solicitation has the correct link- layer address; otherwise it would not have be able to send the unicast solicitation in the first place. However, including the link-layer address in this case adds little overhead and eliminates a potential race condition where the sender deletes the cached link-layer address prior to receiving a response to a previous solicitation.”}(hjhxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj;xubeh}(h]h ]h"]h$]h&]uh1j hj)xubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXndisc_notify - BOOLEAN Define mode for notification of address and device changes. Possible values: - 0 (disabled) - do nothing - 1 (enabled) - Generate unsolicited neighbour advertisements when device is brought up or hardware address changes. Default: 0 (disabled) h](h)}(hndisc_notify - BOOLEANh]hndisc_notify - BOOLEAN}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjxubj )}(hhh](j)}(h;Define mode for notification of address and device changes.h]h;Define mode for notification of address and device changes.}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxubj)}(hPossible values:h]hPossible values:}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxubj;)}(hhh](j@)}(h0 (disabled) - do nothingh]j )}(hjxh]h0 (disabled) - do nothing}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxubah}(h]h ]h"]h$]h&]uh1j?hjxubj@)}(ht1 (enabled) - Generate unsolicited neighbour advertisements when device is brought up or hardware address changes. h]j)}(hs1 (enabled) - Generate unsolicited neighbour advertisements when device is brought up or hardware address changes.h]hs1 (enabled) - Generate unsolicited neighbour advertisements when device is brought up or hardware address changes.}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxubah}(h]h ]h"]h$]h&]uh1j?hjxubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjxubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjxubeh}(h]h ]h"]h$]h&]uh1j hjxubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXndisc_tclass - INTEGER The IPv6 Traffic Class to use by default when sending IPv6 Neighbor Discovery (Router Solicitation, Router Advertisement, Neighbor Solicitation, Neighbor Advertisement, Redirect) messages. These 8 bits can be interpreted as 6 high order bits holding the DSCP value and 2 low order bits representing ECN (which you probably want to leave cleared). * 0 - (default) h](h)}(hndisc_tclass - INTEGERh]hndisc_tclass - INTEGER}(hj yhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjyubj )}(hhh](j)}(hXZThe IPv6 Traffic Class to use by default when sending IPv6 Neighbor Discovery (Router Solicitation, Router Advertisement, Neighbor Solicitation, Neighbor Advertisement, Redirect) messages. These 8 bits can be interpreted as 6 high order bits holding the DSCP value and 2 low order bits representing ECN (which you probably want to leave cleared).h]hXZThe IPv6 Traffic Class to use by default when sending IPv6 Neighbor Discovery (Router Solicitation, Router Advertisement, Neighbor Solicitation, Neighbor Advertisement, Redirect) messages. These 8 bits can be interpreted as 6 high order bits holding the DSCP value and 2 low order bits representing ECN (which you probably want to leave cleared).}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjyubj;)}(hhh]j@)}(h0 - (default) h]j)}(h 0 - (default)h]h 0 - (default)}(hj/yhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj+yubah}(h]h ]h"]h$]h&]uh1j?hj(yubah}(h]h ]h"]h$]h&]jvjWluh1j:hhhM hjyubeh}(h]h ]h"]h$]h&]uh1j hjyubeh}(h]h ]h"]h$]h&]uh1hhhhM hj chhubh)}(hXndisc_evict_nocarrier - BOOLEAN Clears the neighbor discovery table on NOCARRIER events. This option is important for wireless devices where the neighbor discovery cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1). Possible values: - 0 (disabled) - Do not clear neighbor discovery cache on NOCARRIER events. - 1 (enabled) - Clear neighbor discover cache on NOCARRIER events. Default: 1 (enabled) h](h)}(hndisc_evict_nocarrier - BOOLEANh]hndisc_evict_nocarrier - BOOLEAN}(hjYyhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM+ hjUyubj )}(hhh](j)}(hX Clears the neighbor discovery table on NOCARRIER events. This option is important for wireless devices where the neighbor discovery cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1).h]hX Clears the neighbor discovery table on NOCARRIER events. This option is important for wireless devices where the neighbor discovery cache should not be cleared when roaming between access points on the same network. In most cases this should remain as the default (1).}(hjjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM! hjgyubj)}(hPossible values:h]hPossible values:}(hjxyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM& hjgyubj;)}(hhh](j@)}(hI0 (disabled) - Do not clear neighbor discovery cache on NOCARRIER events.h]j)}(hjyh]hI0 (disabled) - Do not clear neighbor discovery cache on NOCARRIER events.}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM( hjyubah}(h]h ]h"]h$]h&]uh1j?hjyubj@)}(hB1 (enabled) - Clear neighbor discover cache on NOCARRIER events. h]j)}(hA1 (enabled) - Clear neighbor discover cache on NOCARRIER events.h]hA1 (enabled) - Clear neighbor discover cache on NOCARRIER events.}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM) hjyubah}(h]h ]h"]h$]h&]uh1j?hjyubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM( hjgyubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM+ hjgyubeh}(h]h ]h"]h$]h&]uh1j hjUyubeh}(h]h ]h"]h$]h&]uh1hhhhM+ hj chhubh)}(hmldv1_unsolicited_report_interval - INTEGER The interval in milliseconds in which the next unsolicited MLDv1 report retransmit will take place. Default: 10000 (10 seconds) h](h)}(h+mldv1_unsolicited_report_interval - INTEGERh]h+mldv1_unsolicited_report_interval - INTEGER}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM1 hjyubj )}(hhh](j)}(hcThe interval in milliseconds in which the next unsolicited MLDv1 report retransmit will take place.h]hcThe interval in milliseconds in which the next unsolicited MLDv1 report retransmit will take place.}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM. hjyubj)}(hDefault: 10000 (10 seconds)h]hDefault: 10000 (10 seconds)}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM1 hjyubeh}(h]h ]h"]h$]h&]uh1j hjyubeh}(h]h ]h"]h$]h&]uh1hhhhM1 hj chhubh)}(hmldv2_unsolicited_report_interval - INTEGER The interval in milliseconds in which the next unsolicited MLDv2 report retransmit will take place. Default: 1000 (1 second) h](h)}(h+mldv2_unsolicited_report_interval - INTEGERh]h+mldv2_unsolicited_report_interval - INTEGER}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM7 hjzubj )}(hhh](j)}(hcThe interval in milliseconds in which the next unsolicited MLDv2 report retransmit will take place.h]hcThe interval in milliseconds in which the next unsolicited MLDv2 report retransmit will take place.}(hj*zhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4 hj'zubj)}(hDefault: 1000 (1 second)h]hDefault: 1000 (1 second)}(hj8zhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM7 hj'zubeh}(h]h ]h"]h$]h&]uh1j hjzubeh}(h]h ]h"]h$]h&]uh1hhhhM7 hj chhubh)}(hforce_mld_version - INTEGER * 0 - (default) No enforcement of a MLD version, MLDv1 fallback allowed * 1 - Enforce to use MLD version 1 * 2 - Enforce to use MLD version 2 h](h)}(hforce_mld_version - INTEGERh]hforce_mld_version - INTEGER}(hjVzhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM< hjRzubj )}(hhh]j;)}(hhh](j@)}(hE0 - (default) No enforcement of a MLD version, MLDv1 fallback allowedh]j)}(hjlzh]hE0 - (default) No enforcement of a MLD version, MLDv1 fallback allowed}(hjnzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM: hjjzubah}(h]h ]h"]h$]h&]uh1j?hjgzubj@)}(h 1 - Enforce to use MLD version 1h]j)}(hjzh]h 1 - Enforce to use MLD version 1}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM; hjzubah}(h]h ]h"]h$]h&]uh1j?hjgzubj@)}(h!2 - Enforce to use MLD version 2 h]j)}(h 2 - Enforce to use MLD version 2h]h 2 - Enforce to use MLD version 2}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM< hjzubah}(h]h ]h"]h$]h&]uh1j?hjgzubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM: hjdzubah}(h]h ]h"]h$]h&]uh1j hjRzubeh}(h]h ]h"]h$]h&]uh1hhhhM< hj chhubh)}(hsuppress_frag_ndisc - INTEGER Control RFC 6980 (Security Implications of IPv6 Fragmentation with IPv6 Neighbor Discovery) behavior: * 1 - (default) discard fragmented neighbor discovery packets * 0 - allow fragmented neighbor discovery packets h](h)}(hsuppress_frag_ndisc - INTEGERh]hsuppress_frag_ndisc - INTEGER}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMC hjzubj )}(hhh](j)}(heControl RFC 6980 (Security Implications of IPv6 Fragmentation with IPv6 Neighbor Discovery) behavior:h]heControl RFC 6980 (Security Implications of IPv6 Fragmentation with IPv6 Neighbor Discovery) behavior:}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM? hjzubj;)}(hhh](j@)}(h;1 - (default) discard fragmented neighbor discovery packetsh]j)}(hjzh]h;1 - (default) discard fragmented neighbor discovery packets}(hjzhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMB hjzubah}(h]h ]h"]h$]h&]uh1j?hjzubj@)}(h00 - allow fragmented neighbor discovery packets h]j)}(h/0 - allow fragmented neighbor discovery packetsh]h/0 - allow fragmented neighbor discovery packets}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMC hjzubah}(h]h ]h"]h$]h&]uh1j?hjzubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhMB hjzubeh}(h]h ]h"]h$]h&]uh1j hjzubeh}(h]h ]h"]h$]h&]uh1hhhhMC hj chhubh)}(hXToptimistic_dad - BOOLEAN Whether to perform Optimistic Duplicate Address Detection (RFC 4429). Optimistic Duplicate Address Detection for the interface will be enabled if at least one of conf/{all,interface}/optimistic_dad is set to 1, it will be disabled otherwise. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(hoptimistic_dad - BOOLEANh]hoptimistic_dad - BOOLEAN}(hj-{hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMR hj){ubj )}(hhh](j)}(hEWhether to perform Optimistic Duplicate Address Detection (RFC 4429).h]hEWhether to perform Optimistic Duplicate Address Detection (RFC 4429).}(hj>{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMF hj;{ubj)}(hOptimistic Duplicate Address Detection for the interface will be enabled if at least one of conf/{all,interface}/optimistic_dad is set to 1, it will be disabled otherwise.h]hOptimistic Duplicate Address Detection for the interface will be enabled if at least one of conf/{all,interface}/optimistic_dad is set to 1, it will be disabled otherwise.}(hjL{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMH hj;{ubj)}(hPossible values:h]hPossible values:}(hjZ{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhML hj;{ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjm{h]h 0 (disabled)}(hjo{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMN hjk{ubah}(h]h ]h"]h$]h&]uh1j?hjh{ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMO hj{ubah}(h]h ]h"]h$]h&]uh1j?hjh{ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMN hj;{ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQ hj;{ubeh}(h]h ]h"]h$]h&]uh1j hj){ubeh}(h]h ]h"]h$]h&]uh1hhhhMR hj chhubh)}(hXuse_optimistic - BOOLEAN If enabled, do not classify optimistic addresses as deprecated during source address selection. Preferred addresses will still be chosen before optimistic addresses, subject to other ranking in the source address selection algorithm. This will be enabled if at least one of conf/{all,interface}/use_optimistic is set to 1, disabled otherwise. Possible values: - 0 (disabled) - 1 (enabled) Default: 0 (disabled) h](h)}(huse_optimistic - BOOLEANh]huse_optimistic - BOOLEAN}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMb hj{ubj )}(hhh](j)}(hIf enabled, do not classify optimistic addresses as deprecated during source address selection. Preferred addresses will still be chosen before optimistic addresses, subject to other ranking in the source address selection algorithm.h]hIf enabled, do not classify optimistic addresses as deprecated during source address selection. Preferred addresses will still be chosen before optimistic addresses, subject to other ranking in the source address selection algorithm.}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMU hj{ubj)}(hlThis will be enabled if at least one of conf/{all,interface}/use_optimistic is set to 1, disabled otherwise.h]hlThis will be enabled if at least one of conf/{all,interface}/use_optimistic is set to 1, disabled otherwise.}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMZ hj{ubj)}(hPossible values:h]hPossible values:}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM] hj{ubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hj{h]h 0 (disabled)}(hj|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM_ hj{ubah}(h]h ]h"]h$]h&]uh1j?hj{ubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hj|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM` hj|ubah}(h]h ]h"]h$]h&]uh1j?hj{ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM_ hj{ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj1|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMb hj{ubeh}(h]h ]h"]h$]h&]uh1j hj{ubeh}(h]h ]h"]h$]h&]uh1hhhhMb hj chhubh)}(hXTstable_secret - IPv6 address This IPv6 address will be used as a secret to generate IPv6 addresses for link-local addresses and autoconfigured ones. All addresses generated after setting this secret will be stable privacy ones by default. This can be changed via the addrgenmode ip-link. conf/default/stable_secret is used as the secret for the namespace, the interface specific ones can overwrite that. Writes to conf/all/stable_secret are refused. It is recommended to generate this secret during installation of a system and keep it stable after that. By default the stable secret is unset. h](h)}(hstable_secret - IPv6 addressh]hstable_secret - IPv6 address}(hjO|hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMp hjK|ubj )}(hhh](j)}(hXThis IPv6 address will be used as a secret to generate IPv6 addresses for link-local addresses and autoconfigured ones. All addresses generated after setting this secret will be stable privacy ones by default. This can be changed via the addrgenmode ip-link. conf/default/stable_secret is used as the secret for the namespace, the interface specific ones can overwrite that. Writes to conf/all/stable_secret are refused.h]hXThis IPv6 address will be used as a secret to generate IPv6 addresses for link-local addresses and autoconfigured ones. All addresses generated after setting this secret will be stable privacy ones by default. This can be changed via the addrgenmode ip-link. conf/default/stable_secret is used as the secret for the namespace, the interface specific ones can overwrite that. Writes to conf/all/stable_secret are refused.}(hj`|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMe hj]|ubj)}(hhIt is recommended to generate this secret during installation of a system and keep it stable after that.h]hhIt is recommended to generate this secret during installation of a system and keep it stable after that.}(hjn|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMm hj]|ubj)}(h&By default the stable secret is unset.h]h&By default the stable secret is unset.}(hj||hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMp hj]|ubeh}(h]h ]h"]h$]h&]uh1j hjK|ubeh}(h]h ]h"]h$]h&]uh1hhhhMp hj chhubh)}(hXaddr_gen_mode - INTEGER Defines how link-local and autoconf addresses are generated. = ================================================================= 0 generate address based on EUI64 (default) 1 do no generate a link-local address, use EUI64 for addresses generated from autoconf 2 generate stable privacy addresses, using the secret from stable_secret (RFC7217) 3 generate stable privacy addresses, using a random secret if unset = ================================================================= h](h)}(haddr_gen_mode - INTEGERh]haddr_gen_mode - INTEGER}(hj|hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM| hj|ubj )}(hhh](j)}(huh1jhj'ubj)}(hhh]j)}(hhh](j)}(hhh]j)}(h0x01h]h0x01}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjDubah}(h]h ]h"]h$]h&]uh1jhjAubj)}(hhh]j)}(hIncoming IP interface information according to RFC 5837. Extension will include the index, IPv6 address (if present), name and MTU of the IP interface that received the datagram which elicited the ICMP error.h]hIncoming IP interface information according to RFC 5837. Extension will include the index, IPv6 address (if present), name and MTU of the IP interface that received the datagram which elicited the ICMP error.}(hj^hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj[ubah}(h]h ]h"]h$]h&]uh1jhjAubeh}(h]h ]h"]h$]h&]uh1jhj>ubah}(h]h ]h"]h$]h&]uh1jhj'ubeh}(h]h ]h"]h$]h&]colsKuh1jhj$ubah}(h]h ]h"]h$]h&]uh1jhjubj)}(hDefault: 0x00 (no extensions)h]hDefault: 0x00 (no extensions)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj-hhubh)}(hxfrm6_gc_thresh - INTEGER (Obsolete since linux-4.14) The threshold at which we will start garbage collecting for IPv6 destination cache entries. At twice this value the system will refuse new allocations. h](h)}(hxfrm6_gc_thresh - INTEGERh]hxfrm6_gc_thresh - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM! hjubj )}(hhh]j)}(h(Obsolete since linux-4.14) The threshold at which we will start garbage collecting for IPv6 destination cache entries. At twice this value the system will refuse new allocations.h]h(Obsolete since linux-4.14) The threshold at which we will start garbage collecting for IPv6 destination cache entries. At twice this value the system will refuse new allocations.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM! hj-hhubeh}(h]h ]h"]h$]h&]uh1hhjhhhhhNubj)}(hlIPv6 Update by: Pekka Savola YOSHIFUJI Hideaki / USAGI Project h](hIPv6 Update by: Pekka Savola <}(hjڃhhhNhNubj1)}(hpekkas@netcore.fih]hpekkas@netcore.fi}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurimailto:pekkas@netcore.fiuh1j1hjڃubh%> YOSHIFUJI Hideaki / USAGI Project <}(hjڃhhhNhNubj1)}(hyoshfuji@linux-ipv6.orgh]hyoshfuji@linux-ipv6.org}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurimailto:yoshfuji@linux-ipv6.orguh1j1hjڃubh>}(hjڃhhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhM# hjhhubeh}(h]icmpah ]h"]icmp/*:ah$]h&]uh1hhhhhhhhM ubh)}(hhh](h)}(h!/proc/sys/net/bridge/* Variables:h]h!/proc/sys/net/bridge/* Variables:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhhhhhM) ubj)}(h"bridge-nf-call-arptables - BOOLEANh]h"bridge-nf-call-arptables - BOOLEAN}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM+ hjhhubj )}(hPossible values: - 0 (disabled) - disable this. - 1 (enabled) - pass bridged ARP traffic to arptables' FORWARD chain. Default: 1 (enabled) h](j)}(hPossible values:h]hPossible values:}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM- hj7ubj;)}(hhh](j@)}(h0 (disabled) - disable this.h]j)}(hjNh]h0 (disabled) - disable this.}(hjPhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/ hjLubah}(h]h ]h"]h$]h&]uh1j?hjIubj@)}(hE1 (enabled) - pass bridged ARP traffic to arptables' FORWARD chain. h]j)}(hD1 (enabled) - pass bridged ARP traffic to arptables' FORWARD chain.h]hF1 (enabled) - pass bridged ARP traffic to arptables’ FORWARD chain.}(hjghhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM0 hjcubah}(h]h ]h"]h$]h&]uh1j?hjIubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM/ hj7ubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM2 hj7ubeh}(h]h ]h"]h$]h&]uh1j hhhM- hjhhubj)}(h!bridge-nf-call-iptables - BOOLEANh]h!bridge-nf-call-iptables - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4 hjhhubj )}(hPossible values: - 0 (disabled) - disable this. - 1 (enabled) - pass bridged IPv4 traffic to iptables' chains. Default: 1 (enabled) h](j)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM6 hjubj;)}(hhh](j@)}(h0 (disabled) - disable this.h]j)}(hjh]h0 (disabled) - disable this.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM8 hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h>1 (enabled) - pass bridged IPv4 traffic to iptables' chains. h]j)}(h=1 (enabled) - pass bridged IPv4 traffic to iptables' chains.h]h?1 (enabled) - pass bridged IPv4 traffic to iptables’ chains.}(hjӄhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM9 hjτubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM8 hjubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM; hjubeh}(h]h ]h"]h$]h&]uh1j hhhM6 hjhhubj)}(h"bridge-nf-call-ip6tables - BOOLEANh]h"bridge-nf-call-ip6tables - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM= hjhhubj )}(hPossible values: - 0 (disabled) - disable this. - 1 (enabled) - pass bridged IPv6 traffic to ip6tables' chains. Default: 1 (enabled) h](j)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM? hjubj;)}(hhh](j@)}(h0 (disabled) - disable this.h]j)}(hj&h]h0 (disabled) - disable this.}(hj(hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMA hj$ubah}(h]h ]h"]h$]h&]uh1j?hj!ubj@)}(h?1 (enabled) - pass bridged IPv6 traffic to ip6tables' chains. h]j)}(h>1 (enabled) - pass bridged IPv6 traffic to ip6tables' chains.h]h@1 (enabled) - pass bridged IPv6 traffic to ip6tables’ chains.}(hj?hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMB hj;ubah}(h]h ]h"]h$]h&]uh1j?hj!ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMA hjubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjYhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMD hjubeh}(h]h ]h"]h$]h&]uh1j hhhM? hjhhubj)}(h&bridge-nf-filter-vlan-tagged - BOOLEANh]h&bridge-nf-filter-vlan-tagged - BOOLEAN}(hjmhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMF hjhhubj )}(hPossible values: - 0 (disabled) - disable this. - 1 (enabled) - pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tables Default: 0 (disabled) h](j)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMH hj{ubj;)}(hhh](j@)}(h0 (disabled) - disable this.h]j)}(hjh]h0 (disabled) - disable this.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMJ hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(hR1 (enabled) - pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tables h]j)}(hQ1 (enabled) - pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tablesh]hQ1 (enabled) - pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tables}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMK hjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMJ hj{ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjŅhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMM hj{ubeh}(h]h ]h"]h$]h&]uh1j hhhMH hjhhubj)}(h'bridge-nf-filter-pppoe-tagged - BOOLEANh]h'bridge-nf-filter-pppoe-tagged - BOOLEAN}(hjمhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMO hjhhubj )}(hPossible values: - 0 (disabled) - disable this. - 1 (enabled) - pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables. Default: 0 (disabled) h](j)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQ hjubj;)}(hhh](j@)}(h0 (disabled) - disable this.h]j)}(hjh]h0 (disabled) - disable this.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMS hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(hL1 (enabled) - pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables. h]j)}(hK1 (enabled) - pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables.h]hK1 (enabled) - pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMT hjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMS hjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMV hjubeh}(h]h ]h"]h$]h&]uh1j hhhMQ hjhhubh)}(hhh]h)}(hXbridge-nf-pass-vlan-input-dev - BOOLEAN - 1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan interface on the bridge and set the netfilter input device to the vlan. This allows use of e.g. "iptables -i br0.1" and makes the REDIRECT target work with vlan-on-top-of-bridge interfaces. When no matching vlan interface is found, or this switch is off, the input device is set to the bridge interface. - 0: disable bridge netfilter vlan interface lookup. Default: 0 h](h)}(h'bridge-nf-pass-vlan-input-dev - BOOLEANh]h'bridge-nf-pass-vlan-input-dev - BOOLEAN}(hjLhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMb hjHubj )}(hhh](j;)}(hhh](j@)}(hXs1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan interface on the bridge and set the netfilter input device to the vlan. This allows use of e.g. "iptables -i br0.1" and makes the REDIRECT target work with vlan-on-top-of-bridge interfaces. When no matching vlan interface is found, or this switch is off, the input device is set to the bridge interface. h]j)}(hXr1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan interface on the bridge and set the netfilter input device to the vlan. This allows use of e.g. "iptables -i br0.1" and makes the REDIRECT target work with vlan-on-top-of-bridge interfaces. When no matching vlan interface is found, or this switch is off, the input device is set to the bridge interface.h]hXv1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan interface on the bridge and set the netfilter input device to the vlan. This allows use of e.g. “iptables -i br0.1” and makes the REDIRECT target work with vlan-on-top-of-bridge interfaces. When no matching vlan interface is found, or this switch is off, the input device is set to the bridge interface.}(hjdhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMY hj`ubah}(h]h ]h"]h$]h&]uh1j?hj]ubj@)}(h30: disable bridge netfilter vlan interface lookup. h]j)}(h20: disable bridge netfilter vlan interface lookup.h]h20: disable bridge netfilter vlan interface lookup.}(hj|hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM` hjxubah}(h]h ]h"]h$]h&]uh1j?hj]ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMY hjZubj)}(h Default: 0h]h Default: 0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMb hjZubeh}(h]h ]h"]h$]h&]uh1j hjHubeh}(h]h ]h"]h$]h&]uh1hhhhMb hjEubah}(h]h ]h"]h$]h&]uh1hhjhhhhhNubeh}(h]proc-sys-net-bridge-variablesah ]h"]!/proc/sys/net/bridge/* variables:ah$]h&]uh1hhhhhhhhM) ubh)}(hhh](h)}(h"``proc/sys/net/sctp/*`` Variables:h](jF)}(h``proc/sys/net/sctp/*``h]hproc/sys/net/sctp/*}(hjņhhhNhNubah}(h]h ]h"]h$]h&]uh1jFhjubh Variables:}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhjhhhhhMe ubh)}(hhh](h)}(hX`addip_enable - BOOLEAN Enable or disable extension of Dynamic Address Reconfiguration (ADD-IP) functionality specified in RFC5061. This extension provides the ability to dynamically add and remove new addresses for the SCTP associations. Possible values: - 0 (disabled) - disable extension. - 1 (enabled) - enable extension Default: 0 (disabled) h](h)}(haddip_enable - BOOLEANh]haddip_enable - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMr hjubj )}(hhh](j)}(hEnable or disable extension of Dynamic Address Reconfiguration (ADD-IP) functionality specified in RFC5061. This extension provides the ability to dynamically add and remove new addresses for the SCTP associations.h]hEnable or disable extension of Dynamic Address Reconfiguration (ADD-IP) functionality specified in RFC5061. This extension provides the ability to dynamically add and remove new addresses for the SCTP associations.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMh hjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMm hjubj;)}(hhh](j@)}(h!0 (disabled) - disable extension.h]j)}(hjh]h!0 (disabled) - disable extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMo hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) - enable extension h]j)}(h1 (enabled) - enable extensionh]h1 (enabled) - enable extension}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMp hj+ubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMo hjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMr hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMr hj݆ubh)}(hXpf_enable - INTEGER Enable or disable pf (pf is short for potentially failed) state. A value of pf_retrans > path_max_retrans also disables pf state. That is, one of both pf_enable and pf_retrans > path_max_retrans can disable pf state. Since pf_retrans and path_max_retrans can be changed by userspace application, sometimes user expects to disable pf state by the value of pf_retrans > path_max_retrans, but occasionally the value of pf_retrans or path_max_retrans is changed by the user application, this pf state is enabled. As such, it is necessary to add this to dynamically enable and disable pf state. See: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failover for details. Possible values: - 1: Enable pf. - 0: Disable pf. Default: 1 h](h)}(hpf_enable - INTEGERh]hpf_enable - INTEGER}(hjghhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjcubj )}(hhh](j)}(hXEnable or disable pf (pf is short for potentially failed) state. A value of pf_retrans > path_max_retrans also disables pf state. That is, one of both pf_enable and pf_retrans > path_max_retrans can disable pf state. Since pf_retrans and path_max_retrans can be changed by userspace application, sometimes user expects to disable pf state by the value of pf_retrans > path_max_retrans, but occasionally the value of pf_retrans or path_max_retrans is changed by the user application, this pf state is enabled. As such, it is necessary to add this to dynamically enable and disable pf state. See: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failover for details.h](hXSEnable or disable pf (pf is short for potentially failed) state. A value of pf_retrans > path_max_retrans also disables pf state. That is, one of both pf_enable and pf_retrans > path_max_retrans can disable pf state. Since pf_retrans and path_max_retrans can be changed by userspace application, sometimes user expects to disable pf state by the value of pf_retrans > path_max_retrans, but occasionally the value of pf_retrans or path_max_retrans is changed by the user application, this pf state is enabled. As such, it is necessary to add this to dynamically enable and disable pf state. See: }(hjxhhhNhNubj1)}(h?https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failoverh]h?https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failover}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurijuh1j1hjxubh for details.}(hjxhhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMu hjuubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjuubj;)}(hhh](j@)}(h 1: Enable pf.h]j)}(hjh]h 1: Enable pf.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h0: Disable pf. h]j)}(h0: Disable pf.h]h0: Disable pf.}(hjŇhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjuubj)}(h Default: 1h]h Default: 1}(hj߇hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjuubeh}(h]h ]h"]h$]h&]uh1j hjcubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hXpf_expose - INTEGER Unset or enable/disable pf (pf is short for potentially failed) state exposure. Applications can control the exposure of the PF path state in the SCTP_PEER_ADDR_CHANGE event and access of SCTP_PF-state transport info via SCTP_GET_PEER_ADDR_INFO sockopt. Possible values: - 0: Unset pf state exposure (compatible with old applications). No event will be sent but the transport info can be queried. - 1: Disable pf state exposure. No event will be sent and trying to obtain transport info will return -EACCESS. - 2: Enable pf state exposure. The event will be sent for a transport becoming SCTP_PF state and transport info can be obtained. Default: 0 h](h)}(hpf_expose - INTEGERh]hpf_expose - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hUnset or enable/disable pf (pf is short for potentially failed) state exposure. Applications can control the exposure of the PF path state in the SCTP_PEER_ADDR_CHANGE event and access of SCTP_PF-state transport info via SCTP_GET_PEER_ADDR_INFO sockopt.h]hUnset or enable/disable pf (pf is short for potentially failed) state exposure. Applications can control the exposure of the PF path state in the SCTP_PEER_ADDR_CHANGE event and access of SCTP_PF-state transport info via SCTP_GET_PEER_ADDR_INFO sockopt.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj ubj)}(hPossible values:.h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj ubj;)}(hhh](j@)}(h{0: Unset pf state exposure (compatible with old applications). No event will be sent but the transport info can be queried.h]j)}(h{0: Unset pf state exposure (compatible with old applications). No event will be sent but the transport info can be queried.h]h{0: Unset pf state exposure (compatible with old applications). No event will be sent but the transport info can be queried.}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj-ubah}(h]h ]h"]h$]h&]uh1j?hj*ubj@)}(hm1: Disable pf state exposure. No event will be sent and trying to obtain transport info will return -EACCESS.h]j)}(hm1: Disable pf state exposure. No event will be sent and trying to obtain transport info will return -EACCESS.h]hm1: Disable pf state exposure. No event will be sent and trying to obtain transport info will return -EACCESS.}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjEubah}(h]h ]h"]h$]h&]uh1j?hj*ubj@)}(h2: Enable pf state exposure. The event will be sent for a transport becoming SCTP_PF state and transport info can be obtained. h]j)}(h~2: Enable pf state exposure. The event will be sent for a transport becoming SCTP_PF state and transport info can be obtained.h]h~2: Enable pf state exposure. The event will be sent for a transport becoming SCTP_PF state and transport info can be obtained.}(hjahhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj]ubah}(h]h ]h"]h$]h&]uh1j?hj*ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hj ubj)}(h Default: 0h]h Default: 0}(hj{hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj ubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hXWaddip_noauth_enable - BOOLEAN Dynamic Address Reconfiguration (ADD-IP) requires the use of authentication to protect the operations of adding or removing new addresses. This requirement is mandated so that unauthorized hosts would not be able to hijack associations. However, older implementations may not have implemented this requirement while allowing the ADD-IP extension. For reasons of interoperability, we provide this variable to control the enforcement of the authentication requirement. == =============================================================== 1 Allow ADD-IP extension to be used without authentication. This should only be set in a closed environment for interoperability with older implementations. 0 Enforce the authentication requirement == =============================================================== Default: 0 h](h)}(haddip_noauth_enable - BOOLEANh]haddip_noauth_enable - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hXDynamic Address Reconfiguration (ADD-IP) requires the use of authentication to protect the operations of adding or removing new addresses. This requirement is mandated so that unauthorized hosts would not be able to hijack associations. However, older implementations may not have implemented this requirement while allowing the ADD-IP extension. For reasons of interoperability, we provide this variable to control the enforcement of the authentication requirement.h]hXDynamic Address Reconfiguration (ADD-IP) requires the use of authentication to protect the operations of adding or removing new addresses. This requirement is mandated so that unauthorized hosts would not be able to hijack associations. However, older implementations may not have implemented this requirement while allowing the ADD-IP extension. For reasons of interoperability, we provide this variable to control the enforcement of the authentication requirement.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(hhh]j)}(hhh](j)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1jhjubj)}(hhh]h}(h]h ]h"]h$]h&]colwidthK?uh1jhjubj)}(hhh](j)}(hhh](j)}(hhh]j)}(hjh]h1}(hjۈhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj؈ubah}(h]h ]h"]h$]h&]uh1jhjՈubj)}(hhh]j)}(hAllow ADD-IP extension to be used without authentication. This should only be set in a closed environment for interoperability with older implementations.h]hAllow ADD-IP extension to be used without authentication. This should only be set in a closed environment for interoperability with older implementations.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1jhjՈubeh}(h]h ]h"]h$]h&]uh1jhj҈ubj)}(hhh](j)}(hhh]j)}(hjh]h0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1jhj ubj)}(hhh]j)}(h&Enforce the authentication requirementh]h&Enforce the authentication requirement}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj$ubah}(h]h ]h"]h$]h&]uh1jhj ubeh}(h]h ]h"]h$]h&]uh1jhj҈ubeh}(h]h ]h"]h$]h&]uh1jhjubeh}(h]h ]h"]h$]h&]colsKuh1jhjubah}(h]h ]h"]h$]h&]uh1jhjubj)}(h Default: 0h]h Default: 0}(hjThhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hXbauth_enable - BOOLEAN Enable or disable Authenticated Chunks extension. This extension provides the ability to send and receive authenticated chunks and is required for secure operation of Dynamic Address Reconfiguration (ADD-IP) extension. Possible values: - 0 (disabled) - disable extension. - 1 (enabled) - enable extension Default: 0 (disabled) h](h)}(hauth_enable - BOOLEANh]hauth_enable - BOOLEAN}(hjrhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjnubj )}(hhh](j)}(hEnable or disable Authenticated Chunks extension. This extension provides the ability to send and receive authenticated chunks and is required for secure operation of Dynamic Address Reconfiguration (ADD-IP) extension.h]hEnable or disable Authenticated Chunks extension. This extension provides the ability to send and receive authenticated chunks and is required for secure operation of Dynamic Address Reconfiguration (ADD-IP) extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj;)}(hhh](j@)}(h!0 (disabled) - disable extension.h]j)}(hjh]h!0 (disabled) - disable extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) - enable extension h]j)}(h1 (enabled) - enable extensionh]h1 (enabled) - enable extension}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj׉hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjnubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hXprsctp_enable - BOOLEAN Enable or disable the Partial Reliability extension (RFC3758) which is used to notify peers that a given DATA should no longer be expected. Possible values: - 0 (disabled) - disable extension. - 1 (enabled) - enable extension Default: 1 (enabled) h](h)}(hprsctp_enable - BOOLEANh]hprsctp_enable - BOOLEAN}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hEnable or disable the Partial Reliability extension (RFC3758) which is used to notify peers that a given DATA should no longer be expected.h]hEnable or disable the Partial Reliability extension (RFC3758) which is used to notify peers that a given DATA should no longer be expected.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj;)}(hhh](j@)}(h!0 (disabled) - disable extension.h]j)}(hj'h]h!0 (disabled) - disable extension.}(hj)hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj%ubah}(h]h ]h"]h$]h&]uh1j?hj"ubj@)}(h 1 (enabled) - enable extension h]j)}(h1 (enabled) - enable extensionh]h1 (enabled) - enable extension}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj<ubah}(h]h ]h"]h$]h&]uh1j?hj"ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM hjubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hmax_burst - INTEGER The limit of the number of new packets that can be initially sent. It controls how bursty the generated traffic can be. Default: 4 h](h)}(hmax_burst - INTEGERh]hmax_burst - INTEGER}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjtubj )}(hhh](j)}(hxThe limit of the number of new packets that can be initially sent. It controls how bursty the generated traffic can be.h]hxThe limit of the number of new packets that can be initially sent. It controls how bursty the generated traffic can be.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(h Default: 4h]h Default: 4}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjtubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hassociation_max_retrans - INTEGER Set the maximum number for retransmissions that an association can attempt deciding that the remote end is unreachable. If this value is exceeded, the association is terminated. Default: 10 h](h)}(h!association_max_retrans - INTEGERh]h!association_max_retrans - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hSet the maximum number for retransmissions that an association can attempt deciding that the remote end is unreachable. If this value is exceeded, the association is terminated.h]hSet the maximum number for retransmissions that an association can attempt deciding that the remote end is unreachable. If this value is exceeded, the association is terminated.}(hjƊhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjÊubj)}(h Default: 10h]h Default: 10}(hjԊhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjÊubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hmax_init_retransmits - INTEGER The maximum number of retransmissions of INIT and COOKIE-ECHO chunks that an association will attempt before declaring the destination unreachable and terminating. Default: 8 h](h)}(hmax_init_retransmits - INTEGERh]hmax_init_retransmits - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hThe maximum number of retransmissions of INIT and COOKIE-ECHO chunks that an association will attempt before declaring the destination unreachable and terminating.h]hThe maximum number of retransmissions of INIT and COOKIE-ECHO chunks that an association will attempt before declaring the destination unreachable and terminating.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(h Default: 8h]h Default: 8}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hX path_max_retrans - INTEGER The maximum number of retransmissions that will be attempted on a given path. Once this threshold is exceeded, the path is considered unreachable, and new traffic will use a different path when the association is multihomed. Default: 5 h](h)}(hpath_max_retrans - INTEGERh]hpath_max_retrans - INTEGER}(hj/hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hj+ubj )}(hhh](j)}(hThe maximum number of retransmissions that will be attempted on a given path. Once this threshold is exceeded, the path is considered unreachable, and new traffic will use a different path when the association is multihomed.h]hThe maximum number of retransmissions that will be attempted on a given path. Once this threshold is exceeded, the path is considered unreachable, and new traffic will use a different path when the association is multihomed.}(hj@hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj=ubj)}(h Default: 5h]h Default: 5}(hjNhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hj=ubeh}(h]h ]h"]h$]h&]uh1j hj+ubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hXpf_retrans - INTEGER The number of retransmissions that will be attempted on a given path before traffic is redirected to an alternate transport (should one exist). Note this is distinct from path_max_retrans, as a path that passes the pf_retrans threshold can still be used. Its only deprioritized when a transmission path is selected by the stack. This setting is primarily used to enable fast failover mechanisms without having to reduce path_max_retrans to a very low value. See: http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt for details. Note also that a value of pf_retrans > path_max_retrans disables this feature. Since both pf_retrans and path_max_retrans can be changed by userspace application, a variable pf_enable is used to disable pf state. Default: 0 h](h)}(hpf_retrans - INTEGERh]hpf_retrans - INTEGER}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjhubj )}(hhh](j)}(hXThe number of retransmissions that will be attempted on a given path before traffic is redirected to an alternate transport (should one exist). Note this is distinct from path_max_retrans, as a path that passes the pf_retrans threshold can still be used. Its only deprioritized when a transmission path is selected by the stack. This setting is primarily used to enable fast failover mechanisms without having to reduce path_max_retrans to a very low value. See: http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt for details. Note also that a value of pf_retrans > path_max_retrans disables this feature. Since both pf_retrans and path_max_retrans can be changed by userspace application, a variable pf_enable is used to disable pf state.h](hXThe number of retransmissions that will be attempted on a given path before traffic is redirected to an alternate transport (should one exist). Note this is distinct from path_max_retrans, as a path that passes the pf_retrans threshold can still be used. Its only deprioritized when a transmission path is selected by the stack. This setting is primarily used to enable fast failover mechanisms without having to reduce path_max_retrans to a very low value. See: }(hj}hhhNhNubj1)}(h?http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txth]h?http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurijuh1j1hj}ubh for details. Note also that a value of pf_retrans > path_max_retrans disables this feature. Since both pf_retrans and path_max_retrans can be changed by userspace application, a variable pf_enable is used to disable pf state.}(hj}hhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhM hjzubj)}(h Default: 0h]h Default: 0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjzubeh}(h]h ]h"]h$]h&]uh1j hjhubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hX^ps_retrans - INTEGER Primary.Switchover.Max.Retrans (PSMR), it's a tunable parameter coming from section-5 "Primary Path Switchover" in rfc7829. The primary path will be changed to another active path when the path error counter on the old primary path exceeds PSMR, so that "the SCTP sender is allowed to continue data transmission on a new working path even when the old primary destination address becomes active again". Note this feature is disabled by initializing 'ps_retrans' per netns as 0xffff by default, and its value can't be less than 'pf_retrans' when changing by sysctl. Default: 0xffff h](h)}(hps_retrans - INTEGERh]hps_retrans - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM hjubj )}(hhh](j)}(hX7Primary.Switchover.Max.Retrans (PSMR), it's a tunable parameter coming from section-5 "Primary Path Switchover" in rfc7829. The primary path will be changed to another active path when the path error counter on the old primary path exceeds PSMR, so that "the SCTP sender is allowed to continue data transmission on a new working path even when the old primary destination address becomes active again". Note this feature is disabled by initializing 'ps_retrans' per netns as 0xffff by default, and its value can't be less than 'pf_retrans' when changing by sysctl.h]hXKPrimary.Switchover.Max.Retrans (PSMR), it’s a tunable parameter coming from section-5 “Primary Path Switchover” in rfc7829. The primary path will be changed to another active path when the path error counter on the old primary path exceeds PSMR, so that “the SCTP sender is allowed to continue data transmission on a new working path even when the old primary destination address becomes active again”. Note this feature is disabled by initializing ‘ps_retrans’ per netns as 0xffff by default, and its value can’t be less than ‘pf_retrans’ when changing by sysctl.}(hj͋hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjʋubj)}(hDefault: 0xffffh]hDefault: 0xffff}(hjۋhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjʋubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM hj݆hhubh)}(hrto_initial - INTEGER The initial round trip timeout value in milliseconds that will be used in calculating round trip times. This is the initial time interval for retransmissions. Default: 3000 h](h)}(hrto_initial - INTEGERh]hrto_initial - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hThe initial round trip timeout value in milliseconds that will be used in calculating round trip times. This is the initial time interval for retransmissions.h]hThe initial round trip timeout value in milliseconds that will be used in calculating round trip times. This is the initial time interval for retransmissions.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(h Default: 3000h]h Default: 3000}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hrto_max - INTEGER The maximum value (in milliseconds) of the round trip timeout. This is the largest time interval that can elapse between retransmissions. Default: 60000 h](h)}(hrto_max - INTEGERh]hrto_max - INTEGER}(hj6hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhj2ubj )}(hhh](j)}(hThe maximum value (in milliseconds) of the round trip timeout. This is the largest time interval that can elapse between retransmissions.h]hThe maximum value (in milliseconds) of the round trip timeout. This is the largest time interval that can elapse between retransmissions.}(hjGhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjDubj)}(hDefault: 60000h]hDefault: 60000}(hjUhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjDubeh}(h]h ]h"]h$]h&]uh1j hj2ubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hrto_min - INTEGER The minimum value (in milliseconds) of the round trip timeout. This is the smallest time interval the can elapse between retransmissions. Default: 1000 h](h)}(hrto_min - INTEGERh]hrto_min - INTEGER}(hjshhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjoubj )}(hhh](j)}(hThe minimum value (in milliseconds) of the round trip timeout. This is the smallest time interval the can elapse between retransmissions.h]hThe minimum value (in milliseconds) of the round trip timeout. This is the smallest time interval the can elapse between retransmissions.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM hjubj)}(h Default: 1000h]h Default: 1000}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjoubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hhb_interval - INTEGER The interval (in milliseconds) between HEARTBEAT chunks. These chunks are sent at the specified interval on idle paths to probe the state of a given path between 2 associations. Default: 30000 h](h)}(hhb_interval - INTEGERh]hhb_interval - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hThe interval (in milliseconds) between HEARTBEAT chunks. These chunks are sent at the specified interval on idle paths to probe the state of a given path between 2 associations.h]hThe interval (in milliseconds) between HEARTBEAT chunks. These chunks are sent at the specified interval on idle paths to probe the state of a given path between 2 associations.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hDefault: 30000h]hDefault: 30000}(hjόhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(h|sack_timeout - INTEGER The amount of time (in milliseconds) that the implementation will wait to send a SACK. Default: 200 h](h)}(hsack_timeout - INTEGERh]hsack_timeout - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hVThe amount of time (in milliseconds) that the implementation will wait to send a SACK.h]hVThe amount of time (in milliseconds) that the implementation will wait to send a SACK.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h Default: 200h]h Default: 200}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hvalid_cookie_life - INTEGER The default lifetime of the SCTP cookie (in milliseconds). The cookie is used during association establishment. Default: 60000 h](h)}(hvalid_cookie_life - INTEGERh]hvalid_cookie_life - INTEGER}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM!hj&ubj )}(hhh](j)}(hpThe default lifetime of the SCTP cookie (in milliseconds). The cookie is used during association establishment.h]hpThe default lifetime of the SCTP cookie (in milliseconds). The cookie is used during association establishment.}(hj;hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj8ubj)}(hDefault: 60000h]hDefault: 60000}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM!hj8ubeh}(h]h ]h"]h$]h&]uh1j hj&ubeh}(h]h ]h"]h$]h&]uh1hhhhM!hj݆hhubh)}(hXcookie_preserve_enable - BOOLEAN Enable or disable the ability to extend the lifetime of the SCTP cookie that is used during the establishment phase of SCTP association Possible values: - 0 (disabled) - disable. - 1 (enabled) - enable cookie lifetime extension. Default: 1 (enabled) h](h)}(h cookie_preserve_enable - BOOLEANh]h cookie_preserve_enable - BOOLEAN}(hjghhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM,hjcubj )}(hhh](j)}(hEnable or disable the ability to extend the lifetime of the SCTP cookie that is used during the establishment phase of SCTP associationh]hEnable or disable the ability to extend the lifetime of the SCTP cookie that is used during the establishment phase of SCTP association}(hjxhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM$hjuubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM'hjuubj;)}(hhh](j@)}(h0 (disabled) - disable.h]j)}(hjh]h0 (disabled) - disable.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM)hjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h11 (enabled) - enable cookie lifetime extension. h]j)}(h01 (enabled) - enable cookie lifetime extension.h]h01 (enabled) - enable cookie lifetime extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM*hjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhM)hjuubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj̍hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM,hjuubeh}(h]h ]h"]h$]h&]uh1j hjcubeh}(h]h ]h"]h$]h&]uh1hhhhM,hj݆hhubh)}(hcookie_hmac_alg - STRING Select the hmac algorithm used when generating the cookie value sent by a listening sctp socket to a connecting client in the INIT-ACK chunk. Valid values are: * sha256 * none Default: sha256 h](h)}(hcookie_hmac_alg - STRINGh]hcookie_hmac_alg - STRING}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhM6hjubj )}(hhh](j)}(hSelect the hmac algorithm used when generating the cookie value sent by a listening sctp socket to a connecting client in the INIT-ACK chunk. Valid values are:h]hSelect the hmac algorithm used when generating the cookie value sent by a listening sctp socket to a connecting client in the INIT-ACK chunk. Valid values are:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM/hjubj;)}(hhh](j@)}(hsha256h]j)}(hjh]hsha256}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM3hj ubah}(h]h ]h"]h$]h&]uh1j?hj ubj@)}(hnone h]j)}(hnoneh]hnone}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM4hj#ubah}(h]h ]h"]h$]h&]uh1j?hj ubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhM3hjubj)}(hDefault: sha256h]hDefault: sha256}(hjAhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM6hjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhM6hj݆hhubh)}(hXrcvbuf_policy - INTEGER Determines if the receive buffer is attributed to the socket or to association. SCTP supports the capability to create multiple associations on a single socket. When using this capability, it is possible that a single stalled association that's buffering a lot of data may block other associations from delivering their data by consuming all of the receive buffer space. To work around this, the rcvbuf_policy could be set to attribute the receiver buffer space to each association instead of the socket. This prevents the described blocking. - 1: rcvbuf space is per association - 0: rcvbuf space is per socket Default: 0 h](h)}(hrcvbuf_policy - INTEGERh]hrcvbuf_policy - INTEGER}(hj_hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMFhj[ubj )}(hhh](j)}(hX#Determines if the receive buffer is attributed to the socket or to association. SCTP supports the capability to create multiple associations on a single socket. When using this capability, it is possible that a single stalled association that's buffering a lot of data may block other associations from delivering their data by consuming all of the receive buffer space. To work around this, the rcvbuf_policy could be set to attribute the receiver buffer space to each association instead of the socket. This prevents the described blocking.h]hX%Determines if the receive buffer is attributed to the socket or to association. SCTP supports the capability to create multiple associations on a single socket. When using this capability, it is possible that a single stalled association that’s buffering a lot of data may block other associations from delivering their data by consuming all of the receive buffer space. To work around this, the rcvbuf_policy could be set to attribute the receiver buffer space to each association instead of the socket. This prevents the described blocking.}(hjphhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM9hjmubj;)}(hhh](j@)}(h"1: rcvbuf space is per associationh]j)}(hjh]h"1: rcvbuf space is per association}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMChjubah}(h]h ]h"]h$]h&]uh1j?hj~ubj@)}(h0: rcvbuf space is per socket h]j)}(h0: rcvbuf space is per socketh]h0: rcvbuf space is per socket}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMDhjubah}(h]h ]h"]h$]h&]uh1j?hj~ubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMChjmubj)}(h Default: 0h]h Default: 0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMFhjmubeh}(h]h ]h"]h$]h&]uh1j hj[ubeh}(h]h ]h"]h$]h&]uh1hhhhMFhj݆hhubh)}(hsndbuf_policy - INTEGER Similar to rcvbuf_policy above, this applies to send buffer space. - 1: Send buffer is tracked per association - 0: Send buffer is tracked per socket. Default: 0 h](h)}(hsndbuf_policy - INTEGERh]hsndbuf_policy - INTEGER}(hjԎhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMNhjЎubj )}(hhh](j)}(hBSimilar to rcvbuf_policy above, this applies to send buffer space.h]hBSimilar to rcvbuf_policy above, this applies to send buffer space.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMIhjubj;)}(hhh](j@)}(h)1: Send buffer is tracked per associationh]j)}(hjh]h)1: Send buffer is tracked per association}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMKhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h&0: Send buffer is tracked per socket. h]j)}(h%0: Send buffer is tracked per socket.h]h%0: Send buffer is tracked per socket.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMLhj ubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMKhjubj)}(h Default: 0h]h Default: 0}(hj+hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMNhjubeh}(h]h ]h"]h$]h&]uh1j hjЎubeh}(h]h ]h"]h$]h&]uh1hhhhMNhj݆hhubh)}(hXsctp_mem - vector of 3 INTEGERs: min, pressure, max Number of pages allowed for queueing by all SCTP sockets. * min: Below this number of pages SCTP is not bothered about its memory usage. When amount of memory allocated by SCTP exceeds this number, SCTP starts to moderate memory usage. * pressure: This value was introduced to follow format of tcp_mem. * max: Maximum number of allowed pages. Default is calculated at boot time from amount of available memory. h](h)}(h3sctp_mem - vector of 3 INTEGERs: min, pressure, maxh]h3sctp_mem - vector of 3 INTEGERs: min, pressure, max}(hjIhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMYhjEubj )}(hhh](j)}(h9Number of pages allowed for queueing by all SCTP sockets.h]h9Number of pages allowed for queueing by all SCTP sockets.}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMQhjWubj;)}(hhh](j@)}(hmin: Below this number of pages SCTP is not bothered about its memory usage. When amount of memory allocated by SCTP exceeds this number, SCTP starts to moderate memory usage.h]j)}(hmin: Below this number of pages SCTP is not bothered about its memory usage. When amount of memory allocated by SCTP exceeds this number, SCTP starts to moderate memory usage.h]hmin: Below this number of pages SCTP is not bothered about its memory usage. When amount of memory allocated by SCTP exceeds this number, SCTP starts to moderate memory usage.}(hjohhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMShjkubah}(h]h ]h"]h$]h&]uh1j?hjhubj@)}(h@pressure: This value was introduced to follow format of tcp_mem.h]j)}(hjh]h@pressure: This value was introduced to follow format of tcp_mem.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMVhjubah}(h]h ]h"]h$]h&]uh1j?hjhubj@)}(h&max: Maximum number of allowed pages. h]j)}(h%max: Maximum number of allowed pages.h]h%max: Maximum number of allowed pages.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMWhjubah}(h]h ]h"]h$]h&]uh1j?hjhubeh}(h]h ]h"]h$]h&]jvjWluh1j:hhhMShjWubj)}(hCDefault is calculated at boot time from amount of available memory.h]hCDefault is calculated at boot time from amount of available memory.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMYhjWubeh}(h]h ]h"]h$]h&]uh1j hjEubeh}(h]h ]h"]h$]h&]uh1hhhhMYhj݆hhubh)}(hX(sctp_rmem - vector of 3 INTEGERs: min, default, max Only the first value ("min") is used, "default" and "max" are ignored. * min: Minimal size of receive buffer used by SCTP socket. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure. Default: 4K h](h)}(h3sctp_rmem - vector of 3 INTEGERs: min, default, maxh]h3sctp_rmem - vector of 3 INTEGERs: min, default, max}(hj֏hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMchjҏubj )}(hhh](j)}(hFOnly the first value ("min") is used, "default" and "max" are ignored.h]hROnly the first value (“min”) is used, “default” and “max” are ignored.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM\hjubj;)}(hhh]j@)}(hmin: Minimal size of receive buffer used by SCTP socket. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure. h]j)}(hmin: Minimal size of receive buffer used by SCTP socket. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure.h]hmin: Minimal size of receive buffer used by SCTP socket. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM_hjubah}(h]h ]h"]h$]h&]uh1j?hjubah}(h]h ]h"]h$]h&]jvjWluh1j:hhhM_hjubj)}(h Default: 4Kh]h Default: 4K}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMchjubeh}(h]h ]h"]h$]h&]uh1j hjҏubeh}(h]h ]h"]h$]h&]uh1hhhhMchj݆hhubh)}(hX3sctp_wmem - vector of 3 INTEGERs: min, default, max Only the first value ("min") is used, "default" and "max" are ignored. * min: Minimum size of send buffer that can be used by SCTP sockets. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure. Default: 4K h](h)}(h4sctp_wmem - vector of 3 INTEGERs: min, default, maxh]h4sctp_wmem - vector of 3 INTEGERs: min, default, max}(hj4hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMmhj0ubj )}(hhh](j)}(hFOnly the first value ("min") is used, "default" and "max" are ignored.h]hROnly the first value (“min”) is used, “default” and “max” are ignored.}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMfhjBubj;)}(hhh]j@)}(hmin: Minimum size of send buffer that can be used by SCTP sockets. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure. h]j)}(hmin: Minimum size of send buffer that can be used by SCTP sockets. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure.h]hmin: Minimum size of send buffer that can be used by SCTP sockets. It is guaranteed to each SCTP socket (but not association) even under moderate memory pressure.}(hjZhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMihjVubah}(h]h ]h"]h$]h&]uh1j?hjSubah}(h]h ]h"]h$]h&]jvjWluh1j:hhhMihjBubj)}(h Default: 4Kh]h Default: 4K}(hjthhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMmhjBubeh}(h]h ]h"]h$]h&]uh1j hj0ubeh}(h]h ]h"]h$]h&]uh1hhhhMmhj݆hhubh)}(hXTaddr_scope_policy - INTEGER Control IPv4 address scoping (see https://datatracker.ietf.org/doc/draft-stewart-tsvwg-sctp-ipv4/00/ for details). - 0 - Disable IPv4 address scoping - 1 - Enable IPv4 address scoping - 2 - Follow draft but allow IPv4 private addresses - 3 - Follow draft but allow IPv4 link local addresses Default: 1 h](h)}(haddr_scope_policy - INTEGERh]haddr_scope_policy - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMyhjubj )}(hhh](j)}(hrControl IPv4 address scoping (see https://datatracker.ietf.org/doc/draft-stewart-tsvwg-sctp-ipv4/00/ for details).h](h"Control IPv4 address scoping (see }(hjhhhNhNubj1)}(hBhttps://datatracker.ietf.org/doc/draft-stewart-tsvwg-sctp-ipv4/00/h]hBhttps://datatracker.ietf.org/doc/draft-stewart-tsvwg-sctp-ipv4/00/}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurijuh1j1hjubh for details).}(hjhhhNhNubeh}(h]h ]h"]h$]h&]uh1jhhhMphjubj;)}(hhh](j@)}(h"0 - Disable IPv4 address scopingh]j)}(hjɐh]h"0 - Disable IPv4 address scoping}(hjːhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMthjǐubah}(h]h ]h"]h$]h&]uh1j?hjĐubj@)}(h!1 - Enable IPv4 address scopingh]j)}(hjh]h!1 - Enable IPv4 address scoping}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMuhjސubah}(h]h ]h"]h$]h&]uh1j?hjĐubj@)}(h32 - Follow draft but allow IPv4 private addressesh]j)}(hjh]h32 - Follow draft but allow IPv4 private addresses}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMvhjubah}(h]h ]h"]h$]h&]uh1j?hjĐubj@)}(h73 - Follow draft but allow IPv4 link local addresses h]j)}(h63 - Follow draft but allow IPv4 link local addressesh]h63 - Follow draft but allow IPv4 link local addresses}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMwhj ubah}(h]h ]h"]h$]h&]uh1j?hjĐubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMthjubj)}(h Default: 1h]h Default: 1}(hj*hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMyhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMyhj݆hhubh)}(hXudp_port - INTEGER The listening port for the local UDP tunneling sock. Normally it's using the IANA-assigned UDP port number 9899 (sctp-tunneling). This UDP sock is used for processing the incoming UDP-encapsulated SCTP packets (from RFC6951), and shared by all applications in the same net namespace. This UDP sock will be closed when the value is set to 0. The value will also be used to set the src port of the UDP header for the outgoing UDP-encapsulated SCTP packets. For the dest port, please refer to 'encap_port' below. Default: 0 h](h)}(hudp_port - INTEGERh]hudp_port - INTEGER}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjDubj )}(hhh](j)}(hThe listening port for the local UDP tunneling sock. Normally it's using the IANA-assigned UDP port number 9899 (sctp-tunneling).h]hThe listening port for the local UDP tunneling sock. Normally it’s using the IANA-assigned UDP port number 9899 (sctp-tunneling).}(hjYhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhM|hjVubj)}(hThis UDP sock is used for processing the incoming UDP-encapsulated SCTP packets (from RFC6951), and shared by all applications in the same net namespace. This UDP sock will be closed when the value is set to 0.h]hThis UDP sock is used for processing the incoming UDP-encapsulated SCTP packets (from RFC6951), and shared by all applications in the same net namespace. This UDP sock will be closed when the value is set to 0.}(hjghhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjVubj)}(hThe value will also be used to set the src port of the UDP header for the outgoing UDP-encapsulated SCTP packets. For the dest port, please refer to 'encap_port' below.h]hThe value will also be used to set the src port of the UDP header for the outgoing UDP-encapsulated SCTP packets. For the dest port, please refer to ‘encap_port’ below.}(hjuhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjVubj)}(h Default: 0h]h Default: 0}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjVubeh}(h]h ]h"]h$]h&]uh1j hjDubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXsencap_port - INTEGER The default remote UDP encapsulation port. This value is used to set the dest port of the UDP header for the outgoing UDP-encapsulated SCTP packets by default. Users can also change the value for each sock/asoc/transport by using setsockopt. For further information, please refer to RFC6951. Note that when connecting to a remote server, the client should set this to the port that the UDP tunneling sock on the peer server is listening to and the local UDP tunneling sock on the client also must be started. On the server, it would get the encap_port from the incoming packet's source port. Default: 0 h](h)}(hencap_port - INTEGERh]hencap_port - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(h*The default remote UDP encapsulation port.h]h*The default remote UDP encapsulation port.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hThis value is used to set the dest port of the UDP header for the outgoing UDP-encapsulated SCTP packets by default. Users can also change the value for each sock/asoc/transport by using setsockopt. For further information, please refer to RFC6951.h]hThis value is used to set the dest port of the UDP header for the outgoing UDP-encapsulated SCTP packets by default. Users can also change the value for each sock/asoc/transport by using setsockopt. For further information, please refer to RFC6951.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hX+Note that when connecting to a remote server, the client should set this to the port that the UDP tunneling sock on the peer server is listening to and the local UDP tunneling sock on the client also must be started. On the server, it would get the encap_port from the incoming packet's source port.h]hX-Note that when connecting to a remote server, the client should set this to the port that the UDP tunneling sock on the peer server is listening to and the local UDP tunneling sock on the client also must be started. On the server, it would get the encap_port from the incoming packet’s source port.}(hjΑhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h Default: 0h]h Default: 0}(hjܑhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXplpmtud_probe_interval - INTEGER The time interval (in milliseconds) for the PLPMTUD probe timer, which is configured to expire after this period to receive an acknowledgment to a probe packet. This is also the time interval between the probes for the current pmtu when the probe search is done. PLPMTUD will be disabled when 0 is set, and other values for it must be >= 5000. Default: 0 h](h)}(h plpmtud_probe_interval - INTEGERh]h plpmtud_probe_interval - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(hXThe time interval (in milliseconds) for the PLPMTUD probe timer, which is configured to expire after this period to receive an acknowledgment to a probe packet. This is also the time interval between the probes for the current pmtu when the probe search is done.h]hXThe time interval (in milliseconds) for the PLPMTUD probe timer, which is configured to expire after this period to receive an acknowledgment to a probe packet. This is also the time interval between the probes for the current pmtu when the probe search is done.}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(hPPLPMTUD will be disabled when 0 is set, and other values for it must be >= 5000.h]hPPLPMTUD will be disabled when 0 is set, and other values for it must be >= 5000.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubj)}(h Default: 0h]h Default: 0}(hj'hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXreconf_enable - BOOLEAN Enable or disable extension of Stream Reconfiguration functionality specified in RFC6525. This extension provides the ability to "reset" a stream, and it includes the Parameters of "Outgoing/Incoming SSN Reset", "SSN/TSN Reset" and "Add Outgoing/Incoming Streams". Possible values: - 0 (disabled) - Disable extension. - 1 (enabled) - Enable extension. Default: 0 (disabled) h](h)}(hreconf_enable - BOOLEANh]hreconf_enable - BOOLEAN}(hjEhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjAubj )}(hhh](j)}(hXEnable or disable extension of Stream Reconfiguration functionality specified in RFC6525. This extension provides the ability to "reset" a stream, and it includes the Parameters of "Outgoing/Incoming SSN Reset", "SSN/TSN Reset" and "Add Outgoing/Incoming Streams".h]hXEnable or disable extension of Stream Reconfiguration functionality specified in RFC6525. This extension provides the ability to “reset” a stream, and it includes the Parameters of “Outgoing/Incoming SSN Reset”, “SSN/TSN Reset” and “Add Outgoing/Incoming Streams”.}(hjVhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubj)}(hPossible values:h]hPossible values:}(hjdhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubj;)}(hhh](j@)}(h!0 (disabled) - Disable extension.h]j)}(hjwh]h!0 (disabled) - Disable extension.}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjuubah}(h]h ]h"]h$]h&]uh1j?hjrubj@)}(h 1 (enabled) - Enable extension. h]j)}(h1 (enabled) - Enable extension.h]h1 (enabled) - Enable extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjrubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjSubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjSubeh}(h]h ]h"]h$]h&]uh1j hjAubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXVintl_enable - BOOLEAN Enable or disable extension of User Message Interleaving functionality specified in RFC8260. This extension allows the interleaving of user messages sent on different streams. With this feature enabled, I-DATA chunk will replace DATA chunk to carry user messages if also supported by the peer. Note that to use this feature, one needs to set this option to 1 and also needs to set socket options SCTP_FRAGMENT_INTERLEAVE to 2 and SCTP_INTERLEAVING_SUPPORTED to 1. Possible values: - 0 (disabled) - Disable extension. - 1 (enabled) - Enable extension. Default: 0 (disabled) h](h)}(hintl_enable - BOOLEANh]hintl_enable - BOOLEAN}(hjȒhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjĒubj )}(hhh](j)}(hXEnable or disable extension of User Message Interleaving functionality specified in RFC8260. This extension allows the interleaving of user messages sent on different streams. With this feature enabled, I-DATA chunk will replace DATA chunk to carry user messages if also supported by the peer. Note that to use this feature, one needs to set this option to 1 and also needs to set socket options SCTP_FRAGMENT_INTERLEAVE to 2 and SCTP_INTERLEAVING_SUPPORTED to 1.h]hXEnable or disable extension of User Message Interleaving functionality specified in RFC8260. This extension allows the interleaving of user messages sent on different streams. With this feature enabled, I-DATA chunk will replace DATA chunk to carry user messages if also supported by the peer. Note that to use this feature, one needs to set this option to 1 and also needs to set socket options SCTP_FRAGMENT_INTERLEAVE to 2 and SCTP_INTERLEAVING_SUPPORTED to 1.}(hjْhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj֒ubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj֒ubj;)}(hhh](j@)}(h!0 (disabled) - Disable extension.h]j)}(hjh]h!0 (disabled) - Disable extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) - Enable extension. h]j)}(h1 (enabled) - Enable extension.h]h1 (enabled) - Enable extension.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhj֒ubj)}(hDefault: 0 (disabled)h]hDefault: 0 (disabled)}(hj-hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj֒ubeh}(h]h ]h"]h$]h&]uh1j hjĒubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXecn_enable - BOOLEAN Control use of Explicit Congestion Notification (ECN) by SCTP. Like in TCP, ECN is used only when both ends of the SCTP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets. Possible values: - 0 (disabled) - Disable ecn. - 1 (enabled) - Enable ecn. Default: 1 (enabled) h](h)}(hecn_enable - BOOLEANh]hecn_enable - BOOLEAN}(hjKhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjGubj )}(hhh](j)}(hX*Control use of Explicit Congestion Notification (ECN) by SCTP. Like in TCP, ECN is used only when both ends of the SCTP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets.h]hX*Control use of Explicit Congestion Notification (ECN) by SCTP. Like in TCP, ECN is used only when both ends of the SCTP connection indicate support for it. This feature is useful in avoiding losses due to congestion by allowing supporting routers to signal congestion before having to drop packets.}(hj\hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjYubj)}(hPossible values:h]hPossible values:}(hjjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjYubj;)}(hhh](j@)}(h0 (disabled) - Disable ecn.h]j)}(hj}h]h0 (disabled) - Disable ecn.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhj{ubah}(h]h ]h"]h$]h&]uh1j?hjxubj@)}(h1 (enabled) - Enable ecn. h]j)}(h1 (enabled) - Enable ecn.h]h1 (enabled) - Enable ecn.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjxubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjYubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjYubeh}(h]h ]h"]h$]h&]uh1j hjGubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubh)}(hXel3mdev_accept - BOOLEAN Enabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV. Possible values: - 0 (disabled) - 1 (enabled) Default: 1 (enabled) h](h)}(hl3mdev_accept - BOOLEANh]hl3mdev_accept - BOOLEAN}(hjΓhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjʓubj )}(hhh](j)}(hXEnabling this option allows a "global" bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.h]hX Enabling this option allows a “global” bound socket to work across L3 master domains (e.g., VRFs) with packets capable of being received regardless of the L3 domain in which they originated. Only valid when the kernel was compiled with CONFIG_NET_L3_MASTER_DEV.}(hjߓhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjܓubj)}(hPossible values:h]hPossible values:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjܓubj;)}(hhh](j@)}(h 0 (disabled)h]j)}(hjh]h 0 (disabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubj@)}(h 1 (enabled) h]j)}(h 1 (enabled)h]h 1 (enabled)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjubah}(h]h ]h"]h$]h&]uh1j?hjubeh}(h]h ]h"]h$]h&]jvjwuh1j:hhhMhjܓubj)}(hDefault: 1 (enabled)h]hDefault: 1 (enabled)}(hj3hhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjܓubeh}(h]h ]h"]h$]h&]uh1j hjʓubeh}(h]h ]h"]h$]h&]uh1hhhhMhj݆hhubeh}(h]h ]h"]h$]h&]uh1hhjhhhhhNubeh}(h]proc-sys-net-sctp-variablesah ]h"]proc/sys/net/sctp/* variables:ah$]h&]uh1hhhhhhhhMe ubh)}(hhh](h)}(h``/proc/sys/net/core/*``h]jF)}(hj`h]h/proc/sys/net/core/*}(hjbhhhNhNubah}(h]h ]h"]h$]h&]uh1jFhj^ubah}(h]h ]h"]h$]h&]uh1hhj[hhhhhMubj )}(hYPlease see: Documentation/admin-guide/sysctl/net.rst for descriptions of these entries. h]j)}(hWPlease see: Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.h]hWPlease see: Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.}(hjyhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjuubah}(h]h ]h"]h$]h&]uh1j hhhMhj[hhubeh}(h]proc-sys-net-coreah ]h"]/proc/sys/net/core/*ah$]h&]uh1hhhhhhhhMubh)}(hhh](h)}(h``/proc/sys/net/unix/*``h]jF)}(hjh]h/proc/sys/net/unix/*}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1jFhjubah}(h]h ]h"]h$]h&]uh1hhjhhhhhMubh)}(hhh]h)}(hWmax_dgram_qlen - INTEGER The maximum length of dgram socket receive queue Default: 10 h](h)}(hmax_dgram_qlen - INTEGERh]hmax_dgram_qlen - INTEGER}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhMhjubj )}(hhh](j)}(h0The maximum length of dgram socket receive queueh]h0The maximum length of dgram socket receive queue}(hjǔhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjĔubj)}(h Default: 10h]h Default: 10}(hjՔhhhNhNubah}(h]h ]h"]h$]h&]uh1jhhhMhjĔubeh}(h]h ]h"]h$]h&]uh1j hjubeh}(h]h ]h"]h$]h&]uh1hhhhMhjubah}(h]h ]h"]h$]h&]uh1hhjhhhhhNubeh}(h]proc-sys-net-unixah ]h"]/proc/sys/net/unix/*ah$]h&]uh1hhhhhhhhMubeh}(h] ip-sysctlah ]h"] ip sysctlah$]h&]uh1hhhhhhhhKubeh}(h]h ]h"]h$]h&]sourcehuh1hcurrent_sourceN current_lineNsettingsdocutils.frontendValues)}(hN generatorN datestampN source_linkN source_urlN toc_backlinksjfootnote_backlinksK sectnum_xformKstrip_commentsNstrip_elements_with_classesN strip_classesN report_levelK halt_levelKexit_status_levelKdebugNwarning_streamN tracebackinput_encoding utf-8-siginput_encoding_error_handlerstrictoutput_encodingutf-8output_encoding_error_handlerj'error_encodingutf-8error_encoding_error_handlerbackslashreplace language_codeenrecord_dependenciesNconfigN id_prefixhauto_id_prefixid dump_settingsNdump_internalsNdump_transformsNdump_pseudo_xmlNexpose_internalsNstrict_visitorN_disable_configN_sourcehnj _destinationN _config_files]7/var/lib/git/docbuild/linux/Documentation/docutils.confafile_insertion_enabled raw_enabledKline_length_limitM'pep_referencesN pep_base_urlhttps://peps.python.org/pep_file_url_templatepep-%04drfc_referencesN rfc_base_url&https://datatracker.ietf.org/doc/html/ tab_widthKtrim_footnote_reference_spacesyntax_highlightlong smart_quotessmartquotes_locales]character_level_inline_markupdoctitle_xform docinfo_xformKsectsubtitle_xform image_loadinglinkembed_stylesheetcloak_email_addressessection_self_linkenvNubreporterNindirect_targets]substitution_defs}substitution_names}refnames}1](jW@j@jTAjAesrefids}nameids}(jjjk jh jjjH4jE4jd6ja6j 7j7j8j8jVjVjFCjg@j jjjjjjXjUjjjju nametypes}(jjk jjH4jd6j 7j8jVjFCj jjjXjjuh}(jhjh hjjn jE4jja6jK4j7jg6j8j 7jVj8ja@jW@j@j@j^AjTAjAjAjg@j CjjVjjjjjUjjj[jju footnote_refs}jg](jW@j@jTAjAes citation_refs} autofootnotes]autofootnote_refs]symbol_footnotes]symbol_footnote_refs] footnotes]j Ca citations]autofootnote_startKsymbol_footnote_startK id_counter collectionsCounter}j5KsRparse_messages]transform_messages] transformerN include_log] decorationNhhub.