Lines Matching +full:echo +full:- +full:active +full:- +full:ms
1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
25 ip_no_pmtu_disc - INTEGER
27 fragmentation-required ICMP is received, the PMTU to this
38 accept fragmentation-needed errors if the underlying protocol
48 Possible values: 0-3
52 min_pmtu - INTEGER
53 default 552 - minimum Path MTU. Unless this is changed manually,
56 ip_forward_use_pmtu - BOOLEAN
60 You only need to enable this if you have user-space software
69 - 0 - disabled
70 - 1 - enabled
72 fwmark_reflect - BOOLEAN
73 Controls the fwmark of kernel-generated IPv4 reply packets that are not
74 associated with a socket for example, TCP RSTs or ICMP echo replies).
80 fib_multipath_use_neigh - BOOLEAN
90 - 0 - disabled
91 - 1 - enabled
93 fib_multipath_hash_policy - INTEGER
101 - 0 - Layer 3
102 - 1 - Layer 4
103 - 2 - Layer 3 or inner Layer 3 if present
104 - 3 - Custom multipath hash. Fields used for multipath hash calculation
107 fib_multipath_hash_fields - UNSIGNED INTEGER
134 fib_multipath_hash_seed - UNSIGNED INTEGER
140 internal random-generated one.
142 The actual hashing algorithm is not specified -- there is no guarantee
148 fib_sync_mem - UNSIGNED INTEGER
154 ip_forward_update_priority - INTEGER
157 according to an rt_tos2priority table (see e.g. man tc-prio).
163 - 0 - Do not update priority.
164 - 1 - Update priority.
166 route/max_size - INTEGER
176 neigh/default/gc_thresh1 - INTEGER
182 neigh/default/gc_thresh2 - INTEGER
189 neigh/default/gc_thresh3 - INTEGER
190 Maximum number of non-PERMANENT neighbor entries allowed. Increase
192 with large numbers of directly-connected peers.
196 neigh/default/unres_qlen_bytes - INTEGER
209 neigh/default/unres_qlen - INTEGER
222 neigh/default/interval_probe_time_ms - INTEGER
228 mtu_expires - INTEGER
231 min_adv_mss - INTEGER
235 fib_notify_on_flag_change - INTEGER
246 The notifications will indicate to user-space the state of the route.
252 - 0 - Do not emit notifications.
253 - 1 - Emit notifications.
254 - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change.
258 ipfrag_high_thresh - LONG INTEGER
261 ipfrag_low_thresh - LONG INTEGER
262 (Obsolete since linux-4.17)
267 ipfrag_time - INTEGER
270 ipfrag_max_dist - INTEGER
271 ipfrag_max_dist is a non-negative integer value which defines the
278 is done on fragments before they are added to a reassembly queue - if
293 bc_forwarding - INTEGER
294 bc_forwarding enables the feature described in rfc1812#section-5.3.5.2
303 inet_peer_threshold - INTEGER
306 entries' time-to-live and time intervals between garbage collection
307 passes. More entries, less time-to-live, less GC interval.
309 inet_peer_minttl - INTEGER
310 Minimum time-to-live of entries. Should be enough to cover fragment
311 time-to-live on the reassembling side. This minimum time-to-live is
315 inet_peer_maxttl - INTEGER
316 Maximum time-to-live of entries. Unused entries will expire after
324 somaxconn - INTEGER
326 Defaults to 4096. (Was 128 before linux-5.4)
329 tcp_abort_on_overflow - BOOLEAN
337 tcp_adv_win_scale - INTEGER
338 Obsolete since linux-6.6
340 (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
343 Possible values are [-31, 31], inclusive.
347 tcp_allowed_congestion_control - STRING
348 Show/set the congestion control choices available to non-privileged
354 tcp_app_win - INTEGER
362 tcp_autocorking - BOOLEAN
373 tcp_available_congestion_control - STRING
378 tcp_base_mss - INTEGER
383 tcp_mtu_probe_floor - INTEGER
389 tcp_min_snd_mss - INTEGER
398 tcp_congestion_control - STRING
408 tcp_dsack - BOOLEAN
411 tcp_early_retrans - INTEGER
413 losses into fast recovery (draft-ietf-tcpm-rack). Note that
418 - 0 disables TLP
419 - 3 or 4 enables TLP
423 tcp_ecn - INTEGER
442 tcp_ecn_fallback - BOOLEAN
444 back to non-ECN. Currently, this knob implements the fallback
452 tcp_fack - BOOLEAN
455 tcp_fin_timeout - INTEGER
459 valid "receive only" state for an un-orphaned connection, an
467 tcp_frto - INTEGER
468 Enables Forward RTO-Recovery (F-RTO) defined in RFC5682.
469 F-RTO is an enhanced recovery algorithm for TCP retransmission
471 RTT fluctuates (e.g., wireless). F-RTO is sender-side only
474 By default it's enabled with a non-zero value. 0 disables F-RTO.
476 tcp_fwmark_accept - BOOLEAN
487 tcp_invalid_ratelimit - INTEGER
492 (a) out-of-window sequence number,
493 (b) out-of-window acknowledgment number, or
497 a buggy or malicious middlebox or man-in-the-middle can
503 Using 0 disables rate-limiting of dupacks in response to
509 tcp_keepalive_time - INTEGER
513 tcp_keepalive_probes - INTEGER
517 tcp_keepalive_intvl - INTEGER
523 tcp_l3mdev_accept - BOOLEAN
533 tcp_low_latency - BOOLEAN
536 tcp_max_orphans - INTEGER
548 tcp_max_syn_backlog - INTEGER
552 This is a per-listener limit.
562 tcp_max_tw_buckets - INTEGER
564 If this number is exceeded time-wait socket is immediately destroyed
570 tcp_mem - vector of 3 INTEGERs: min, pressure, max
584 tcp_min_rtt_wlen - INTEGER
591 Possible values: 0 - 86400 (1 day)
595 tcp_moderate_rcvbuf - BOOLEAN
596 If set, TCP performs receive buffer auto-tuning, attempting to
601 tcp_mtu_probing - INTEGER
602 Controls TCP Packetization-Layer Path MTU Discovery. Takes three
605 - 0 - Disabled
606 - 1 - Disabled by default, enabled when an ICMP black hole detected
607 - 2 - Always enabled, use initial MSS of tcp_base_mss.
609 tcp_probe_interval - UNSIGNED INTEGER
610 Controls how often to start TCP Packetization-Layer Path MTU
614 tcp_probe_threshold - INTEGER
615 Controls when TCP Packetization-Layer Path MTU Discovery probing
619 tcp_no_metrics_save - BOOLEAN
627 tcp_no_ssthresh_metrics_save - BOOLEAN
632 tcp_orphan_retries - INTEGER
643 tcp_recovery - INTEGER
659 tcp_reflect_tos - BOOLEAN
669 tcp_reordering - INTEGER
676 tcp_max_reordering - INTEGER
683 tcp_retrans_collapse - BOOLEAN
684 Bug-to-bug compatibility with some broken printers.
688 tcp_retries1 - INTEGER
697 tcp_retries2 - INTEGER
714 tcp_rfc1337 - BOOLEAN
721 tcp_rmem - vector of 3 INTEGERs: min, default, max
740 tcp_sack - BOOLEAN
743 tcp_comp_sack_delay_ns - LONG INTEGER
746 The default is 1ms, based on TSO autosizing period.
748 Default : 1,000,000 ns (1 ms)
750 tcp_comp_sack_slack_ns - LONG INTEGER
758 tcp_comp_sack_nr - INTEGER
764 tcp_backlog_ack_defer - BOOLEAN
771 tcp_slow_start_after_idle - BOOLEAN
779 tcp_stdurg - BOOLEAN
786 tcp_synack_retries - INTEGER
793 tcp_syncookies - INTEGER
818 tcp_migrate_req - BOOLEAN
820 the initial SYN packet is received during the three-way handshake.
821 When a listener is closed, in-flight request sockets during the
843 tcp_fastopen - INTEGER
854 the option value being the length of the syn-data backlog.
862 application before 3-way handshake finishes.
865 0x200 (server) accept data-in-SYN w/o any cookie option present.
875 tcp_fastopen_blackhole_timeout_sec - INTEGER
876 Initial time period in second to disable Fastopen on active TCP sockets
879 get detected right after Fastopen is re-enabled and will reset to
885 tcp_fastopen_key - list of comma separated 32-digit hexadecimal INTEGERs
896 per-socket keys will be used instead of any keys that are specified via
899 A key is specified as 4 8-digit hexadecimal integers which are separated
900 by a '-' as: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx. Leading zeros may be
905 tcp_syn_retries - INTEGER
906 Number of times initial SYNs for an active TCP connection attempt
910 With this the final timeout for an active TCP connection attempt
913 tcp_timestamps - INTEGER
916 - 0: Disabled.
917 - 1: Enable timestamps as defined in RFC1323 and use random offset for
919 - 2: Like 1, but without random offsets.
923 tcp_min_tso_segs - INTEGER
926 Since linux-3.12, TCP does an automatic sizing of TSO frames,
934 tcp_tso_rtt_log - INTEGER
937 Starting from linux-5.18, TCP autosizing can be tweaked
943 tso_packet_size = sk->sk_pacing_rate / 1024;
957 tcp_pacing_ss_ratio - INTEGER
958 sk->sk_pacing_rate is set by TCP stack using a ratio applied
966 tcp_pacing_ca_ratio - INTEGER
967 sk->sk_pacing_rate is set by TCP stack using a ratio applied
974 tcp_syn_linear_timeouts - INTEGER
975 The number of times for an active TCP connection to retransmit SYNs with
984 tcp_tso_win_divisor - INTEGER
992 tcp_tw_reuse - INTEGER
993 Enable reuse of TIME-WAIT sockets for new connections when it is
996 - 0 - disable
997 - 1 - global enable
998 - 2 - enable for loopback traffic only
1005 tcp_tw_reuse_delay - UNSIGNED INTEGER
1006 The delay in milliseconds before a TIME-WAIT socket can be reused by a
1007 new connection, if TIME-WAIT socket reuse is enabled. The actual reuse
1019 tcp_window_scaling - BOOLEAN
1022 tcp_shrink_window - BOOLEAN
1029 - 0 - Disabled. The window is never shrunk.
1030 - 1 - Enabled. The window is shrunk when necessary to remain within
1032 This only occurs if a non-zero receive window
1037 tcp_wmem - vector of 3 INTEGERs: min, default, max
1058 tcp_notsent_lowat - UNSIGNED INTEGER
1071 tcp_workaround_signed_windows - BOOLEAN
1079 tcp_thin_linear_timeouts - BOOLEAN
1086 non-aggressive thin streams, often found to be time-dependent.
1088 Documentation/networking/tcp-thin.rst
1092 tcp_limit_output_bytes - INTEGER
1104 tcp_challenge_ack_limit - INTEGER
1106 in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks)
1112 tcp_ehash_entries - INTEGER
1119 tcp_child_ehash_entries - INTEGER
1137 Possible values: 0, 2^n (n: 0 - 24 (16Mi))
1141 tcp_plb_enabled - BOOLEAN
1152 field, and currently no-op for IPv4 headers. It is possible
1165 tcp_plb_idle_rehash_rounds - INTEGER
1171 Possible Values: 0 - 31
1175 tcp_plb_rehash_rounds - INTEGER
1182 Possible Values: 0 - 31
1186 tcp_plb_suspend_rto_sec - INTEGER
1194 Possible Values: 0 - 255
1198 tcp_plb_cong_thresh - INTEGER
1203 The 0-1 fraction range is mapped to 0-256 range to avoid floating
1212 Possible Values: 0 - 256
1216 tcp_pingpong_thresh - INTEGER
1219 "ping-pong" (request-response) connection for which delayed
1225 Possible Values: 1 - 255
1229 tcp_rto_min_us - INTEGER
1238 Possible Values: 1 - INT_MAX
1242 tcp_rto_max_ms - INTEGER
1243 Maximal TCP retransmission timeout (in ms).
1249 Possible Values: 1000 - 120,000
1256 udp_l3mdev_accept - BOOLEAN
1265 udp_mem - vector of 3 INTEGERs: min, pressure, max
1276 udp_rmem_min - INTEGER
1283 udp_wmem_min - INTEGER
1286 udp_hash_entries - INTEGER
1293 udp_child_ehash_entries - INTEGER
1308 Possible values: 0, 2^n (n: 7 (128) - 16 (64K))
1316 raw_l3mdev_accept - BOOLEAN
1328 cipso_cache_enable - BOOLEAN
1337 cipso_cache_bucket_size - INTEGER
1347 cipso_rbm_optfmt - BOOLEAN
1351 categories in order to make the packet data 32-bit aligned.
1355 cipso_rbm_structvalid - BOOLEAN
1368 ip_local_port_range - 2 INTEGERS
1377 ip_local_reserved_ports - list of comma separated ranges
1378 Specify the ports which are reserved for known third-party
1384 list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and
1410 ip_unprivileged_port_start - INTEGER
1411 This is a per-namespace sysctl. It defines the first
1419 ip_nonlocal_bind - BOOLEAN
1420 If set, allows processes to bind() to non-local IP addresses,
1421 which can be quite useful - but may break some applications.
1425 ip_autobind_reuse - BOOLEAN
1434 ip_dynaddr - INTEGER
1435 If set non-zero, enables support for dynamic addresses.
1436 If set to a non-zero value larger than 1, a kernel log
1442 ip_early_demux - BOOLEAN
1452 ping_group_range - 2 INTEGERS
1459 tcp_early_demux - BOOLEAN
1464 udp_early_demux - BOOLEAN
1470 icmp_echo_ignore_all - BOOLEAN
1471 If set non-zero, then the kernel will ignore all ICMP ECHO
1476 icmp_echo_enable_probe - BOOLEAN
1482 icmp_echo_ignore_broadcasts - BOOLEAN
1483 If set non-zero, then the kernel will ignore all ICMP ECHO and
1488 icmp_ratelimit - INTEGER
1498 icmp_msgs_per_sec - INTEGER
1506 icmp_msgs_burst - INTEGER
1513 icmp_ratemask - INTEGER
1523 0 Echo Reply
1527 8 Echo Request
1540 icmp_ignore_bogus_error_responses - BOOLEAN
1548 icmp_errors_use_inbound_ifaddr - BOOLEAN
1553 If non-zero, the message will be sent with the primary address of
1560 then the primary address of the first non-loopback interface that
1565 igmp_max_memberships - INTEGER
1577 M = 65536-sizeof (ip header)/(sizeof(Group record))
1582 (65536-24) / 12 = 5459
1587 igmp_max_msf - INTEGER
1593 igmp_qrv - INTEGER
1600 force_igmp_version - INTEGER
1601 - 0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback
1604 - 1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if
1606 - 2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive
1608 - 3 - Enforce to use IGMP version 3. The same react with default 0.
1624 log_martians - BOOLEAN
1630 accept_redirects - BOOLEAN
1634 - both conf/{all,interface}/accept_redirects are TRUE in the case
1639 - at least one of conf/{all,interface}/accept_redirects is TRUE in the
1646 - TRUE (host)
1647 - FALSE (router)
1649 forwarding - BOOLEAN
1653 mc_forwarding - BOOLEAN
1659 medium_id - INTEGER
1664 to its medium, value of -1 means that medium is not known.
1670 proxy_arp - BOOLEAN
1677 proxy_arp_pvlan - BOOLEAN
1695 Hewlett-Packard call it Source-Port filtering or port-isolation.
1696 Ericsson call it MAC-Forced Forwarding (RFC Draft).
1698 proxy_delay - INTEGER
1706 shared_media - BOOLEAN
1716 secure_redirects - BOOLEAN
1729 send_redirects - BOOLEAN
1738 bootp_relay - BOOLEAN
1749 accept_source_route - BOOLEAN
1756 - TRUE (router)
1757 - FALSE (host)
1759 accept_local - BOOLEAN
1765 route_localnet - BOOLEAN
1771 rp_filter - INTEGER
1772 - 0 - No source validation.
1773 - 1 - Strict mode as defined in RFC3704 Strict Reverse Path
1777 - 2 - Loose mode as defined in RFC3704 Loose Reverse Path
1792 src_valid_mark - BOOLEAN
1793 - 0 - The fwmark of the packet is not included in reverse path
1798 - 1 - The fwmark of the packet is included in reverse path route
1811 arp_filter - BOOLEAN
1812 - 1 - Allows you to have multiple network interfaces on the same
1819 - 0 - (default) The kernel can respond to arp requests with addresses
1823 particular interfaces. Only for more complex setups like load-
1830 arp_announce - INTEGER
1835 - 0 - (default) Use any local address, configured on any interface
1836 - 1 - Try to avoid local addresses that are not in the target's
1845 - 2 - Always use the best local address for this target.
1862 arp_ignore - INTEGER
1866 - 0 - (default): reply for any local target IP address, configured
1868 - 1 - reply only if the target IP address is local address
1870 - 2 - reply only if the target IP address is local address
1873 - 3 - do not reply for local addresses configured with scope host,
1875 - 4-7 - reserved
1876 - 8 - do not reply for all local addresses
1881 arp_notify - BOOLEAN
1890 arp_accept - INTEGER
1894 - 0 - don't create new entries in the ARP table
1895 - 1 - create new entries in the ARP table
1896 - 2 - create new entries only if the source IP address is in the same
1907 arp_evict_nocarrier - BOOLEAN
1913 - 1 - (default): Clear the ARP cache on NOCARRIER events
1914 - 0 - Do not clear ARP cache on NOCARRIER events
1916 mcast_solicit - INTEGER
1921 ucast_solicit - INTEGER
1925 app_solicit - INTEGER
1930 mcast_resolicit - INTEGER
1934 disable_policy - BOOLEAN
1937 disable_xfrm - BOOLEAN
1940 igmpv2_unsolicited_report_interval - INTEGER
1946 igmpv3_unsolicited_report_interval - INTEGER
1952 ignore_routes_with_linkdown - BOOLEAN
1955 promote_secondaries - BOOLEAN
1960 drop_unicast_in_l2_multicast - BOOLEAN
1961 Drop any unicast IP packets that are received in link-layer
1969 drop_gratuitous_arp - BOOLEAN
1977 tag - INTEGER
1982 xfrm4_gc_thresh - INTEGER
1983 (Obsolete since linux-4.14)
1988 igmp_link_local_mcast_reports - BOOLEAN
1999 - Andi Kleen
2001 - Nicolas Delon
2013 bindv6only - BOOLEAN
2018 - TRUE: disable IPv4-mapped address feature
2019 - FALSE: enable IPv4-mapped address feature
2023 flowlabel_consistency - BOOLEAN
2028 - TRUE: enabled
2029 - FALSE: disabled
2033 auto_flowlabels - INTEGER
2052 flowlabel_state_ranges - BOOLEAN
2053 Split the flow label number space into two ranges. 0-0x7FFFF is
2054 reserved for the IPv6 flow manager facility, 0x80000-0xFFFFF
2057 - TRUE: enabled
2058 - FALSE: disabled
2062 flowlabel_reflect - INTEGER
2066 https://tools.ietf.org/html/draft-wang-6man-flow-label-reflection-01
2070 - 1: enabled for established flows
2073 in "tcp: change IPv6 flow-label upon receiving spurious retransmission"
2076 - 2: enabled for TCP RESET packets (no active listener)
2080 - 4: enabled for ICMPv6 echo reply messages.
2084 fib_multipath_hash_policy - INTEGER
2091 - 0 - Layer 3 (source and destination addresses plus flow label)
2092 - 1 - Layer 4 (standard 5-tuple)
2093 - 2 - Layer 3 or inner Layer 3 if present
2094 - 3 - Custom multipath hash. Fields used for multipath hash calculation
2097 fib_multipath_hash_fields - UNSIGNED INTEGER
2124 anycast_src_echo_reply - BOOLEAN
2126 echo reply
2128 - TRUE: enabled
2129 - FALSE: disabled
2133 idgen_delay - INTEGER
2140 idgen_retries - INTEGER
2146 mld_qrv - INTEGER
2153 max_dst_opts_number - INTEGER
2154 Maximum number of non-padding TLVs allowed in a Destination
2161 max_hbh_opts_number - INTEGER
2162 Maximum number of non-padding TLVs allowed in a Hop-by-Hop
2169 max_dst_opts_length - INTEGER
2175 max_hbh_length - INTEGER
2176 Maximum length allowed for a Hop-by-Hop options extension
2181 skip_notify_on_dev_down - BOOLEAN
2190 nexthop_compat_mode - BOOLEAN
2201 Note that as a backward-compatible mode, dumping of modern features
2208 fib_notify_on_flag_change - INTEGER
2219 The notifications will indicate to user-space the state of the route.
2225 - 0 - Do not emit notifications.
2226 - 1 - Emit notifications.
2227 - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change.
2229 ioam6_id - INTEGER
2237 ioam6_id_wide - LONG INTEGER
2248 ip6frag_high_thresh - INTEGER
2254 ip6frag_low_thresh - INTEGER
2257 ip6frag_time - INTEGER
2261 Change the interface-specific default settings.
2267 Change all the interface-specific settings.
2271 conf/all/disable_ipv6 - BOOLEAN
2273 setting and also all per-interface ``disable_ipv6`` settings to the same
2281 conf/all/forwarding - BOOLEAN
2292 proxy_ndp - BOOLEAN
2295 fwmark_reflect - BOOLEAN
2296 Controls the fwmark of kernel-generated IPv6 reply packets that are not
2297 associated with a socket for example, TCP RSTs or ICMPv6 echo replies).
2309 accept_ra - INTEGER
2328 - enabled if local forwarding is disabled.
2329 - disabled if local forwarding is enabled.
2331 accept_ra_defrtr - BOOLEAN
2336 - enabled if accept_ra is enabled.
2337 - disabled if accept_ra is disabled.
2339 ra_defrtr_metric - UNSIGNED INTEGER
2349 accept_ra_from_local - BOOLEAN
2350 Accept RA with source-address that is found on local machine
2353 Default is to NOT accept these as it may be an un-intended
2358 - enabled if accept_ra_from_local is enabled
2360 - disabled if accept_ra_from_local is disabled
2363 accept_ra_min_hop_limit - INTEGER
2371 accept_ra_min_lft - INTEGER
2379 accept_ra_pinfo - BOOLEAN
2384 - enabled if accept_ra is enabled.
2385 - disabled if accept_ra is disabled.
2387 ra_honor_pio_life - BOOLEAN
2392 - If enabled, the PIO valid lifetime will always be honored.
2393 - If disabled, RFC4862 section 5.5.3e is used to determine
2398 ra_honor_pio_pflag - BOOLEAN
2399 The Prefix Information Option P-flag indicates the network can
2400 allocate a unique IPv6 prefix per client using DHCPv6-PD.
2401 This sysctl can be enabled when a userspace DHCPv6-PD client
2402 is running to cause the P-flag to take effect: i.e. the
2403 P-flag suppresses any effects of the A-flag within the same
2406 - If disabled, the P-flag is ignored.
2407 - If enabled, the P-flag will disable SLAAC autoconfiguration
2412 accept_ra_rt_info_min_plen - INTEGER
2421 * -1 if accept_ra_rtr_pref is disabled.
2423 accept_ra_rt_info_max_plen - INTEGER
2432 * -1 if accept_ra_rtr_pref is disabled.
2434 accept_ra_rtr_pref - BOOLEAN
2439 - enabled if accept_ra is enabled.
2440 - disabled if accept_ra is disabled.
2442 accept_ra_mtu - BOOLEAN
2448 - enabled if accept_ra is enabled.
2449 - disabled if accept_ra is disabled.
2451 accept_redirects - BOOLEAN
2456 - enabled if local forwarding is disabled.
2457 - disabled if local forwarding is enabled.
2459 accept_source_route - INTEGER
2462 - >= 0: Accept only routing header type 2.
2463 - < 0: Do not accept routing header.
2467 autoconf - BOOLEAN
2473 - enabled if accept_ra_pinfo is enabled.
2474 - disabled if accept_ra_pinfo is disabled.
2476 dad_transmits - INTEGER
2481 forwarding - INTEGER
2482 Configure interface-specific Host/Router behaviour.
2491 - 0 Forwarding disabled
2492 - 1 Forwarding enabled
2518 hop_limit - INTEGER
2523 mtu - INTEGER
2528 ip_nonlocal_bind - BOOLEAN
2529 If set, allows processes to bind() to non-local IPv6 addresses,
2530 which can be quite useful - but may break some applications.
2534 router_probe_interval - INTEGER
2540 router_solicitation_delay - INTEGER
2546 router_solicitation_interval - INTEGER
2551 router_solicitations - INTEGER
2557 use_oif_addrs_only - BOOLEAN
2564 use_tempaddr - INTEGER
2576 * -1 (for point-to-point devices and loopback devices)
2578 temp_valid_lft - INTEGER
2580 minimum required lifetime (typically 5-7 seconds), temporary addresses
2585 temp_prefered_lft - INTEGER
2588 5-7 seconds), the preferred lifetime is the minimum required. If
2594 keep_addr_on_down - INTEGER
2604 max_desync_factor - INTEGER
2612 regen_min_advance - INTEGER
2622 regen_max_retry - INTEGER
2628 max_addresses - INTEGER
2636 disable_ipv6 - BOOLEAN
2638 will be dynamically set to TRUE if DAD fails for the link-local
2644 it will dynamically create a link-local address on the given
2652 accept_dad - INTEGER
2658 2 Enable DAD, and disable IPv6 operation if MAC-based duplicate
2659 link-local address has been found.
2665 force_tllao - BOOLEAN
2666 Enable sending the target link-layer address option even when
2671 Quoting from RFC 2461, section 4.4, Target link-layer address:
2677 omitted since the sender of the solicitation has the correct link-
2679 solicitation in the first place. However, including the link-layer
2681 race condition where the sender deletes the cached link-layer address
2684 ndisc_notify - BOOLEAN
2687 * 0 - (default): do nothing
2688 * 1 - Generate unsolicited neighbour advertisements when device is brought
2691 ndisc_tclass - INTEGER
2699 * 0 - (default)
2701 ndisc_evict_nocarrier - BOOLEAN
2707 - 1 - (default): Clear neighbor discover cache on NOCARRIER events.
2708 - 0 - Do not clear neighbor discovery cache on NOCARRIER events.
2710 mldv1_unsolicited_report_interval - INTEGER
2716 mldv2_unsolicited_report_interval - INTEGER
2722 force_mld_version - INTEGER
2723 * 0 - (default) No enforcement of a MLD version, MLDv1 fallback allowed
2724 * 1 - Enforce to use MLD version 1
2725 * 2 - Enforce to use MLD version 2
2727 suppress_frag_ndisc - INTEGER
2731 * 1 - (default) discard fragmented neighbor discovery packets
2732 * 0 - allow fragmented neighbor discovery packets
2734 optimistic_dad - BOOLEAN
2744 use_optimistic - BOOLEAN
2756 stable_secret - IPv6 address
2758 addresses for link-local addresses and autoconfigured
2761 addrgenmode ip-link. conf/default/stable_secret is used as the
2770 addr_gen_mode - INTEGER
2771 Defines how link-local and autoconf addresses are generated.
2775 1 do no generate a link-local address, use EUI64 for addresses
2782 drop_unicast_in_l2_multicast - BOOLEAN
2783 Drop any unicast IPv6 packets that are received in link-layer
2788 drop_unsolicited_na - BOOLEAN
2795 accept_untracked_na - INTEGER
2799 - 0 - (default) Do not accept unsolicited and untracked neighbor
2802 - 1 - Add a new neighbor cache entry in STALE state for routers on
2804 with target link-layer address option specified if no neighbor entry
2809 This is as per router-side behavior documented in RFC9131.
2813 This will optimize the return path for the initial off-link
2815 ensuring that the first-hop router which turns on this setting doesn't
2816 have to buffer the initial return packets to do neighbor-solicitation.
2822 - 2 - Extend option (1) to add a new neighbor cache entry only if the
2826 enhanced_dad - BOOLEAN
2839 ratelimit - INTEGER
2847 ratemask - list of comma separated ranges
2852 list of ranges (e.g. "0-127,129" for ICMPv6 message type 0 to 127 and
2856 Refer to: https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml
2857 for numerical values of ICMPv6 message types, e.g. echo request is 128
2858 and echo reply is 129.
2860 Default: 0-1,3-127 (rate limit ICMPv6 errors except Packet Too Big)
2862 echo_ignore_all - BOOLEAN
2863 If set non-zero, then the kernel will ignore all ICMP ECHO
2868 echo_ignore_multicast - BOOLEAN
2869 If set non-zero, then the kernel will ignore all ICMP ECHO
2874 echo_ignore_anycast - BOOLEAN
2875 If set non-zero, then the kernel will ignore all ICMP ECHO
2880 error_anycast_as_unicast - BOOLEAN
2887 xfrm6_gc_thresh - INTEGER
2888 (Obsolete since linux-4.14)
2896 YOSHIFUJI Hideaki / USAGI Project <yoshfuji@linux-ipv6.org>
2902 bridge-nf-call-arptables - BOOLEAN
2903 - 1 : pass bridged ARP traffic to arptables' FORWARD chain.
2904 - 0 : disable this.
2908 bridge-nf-call-iptables - BOOLEAN
2909 - 1 : pass bridged IPv4 traffic to iptables' chains.
2910 - 0 : disable this.
2914 bridge-nf-call-ip6tables - BOOLEAN
2915 - 1 : pass bridged IPv6 traffic to ip6tables' chains.
2916 - 0 : disable this.
2920 bridge-nf-filter-vlan-tagged - BOOLEAN
2921 - 1 : pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tables.
2922 - 0 : disable this.
2926 bridge-nf-filter-pppoe-tagged - BOOLEAN
2927 - 1 : pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables.
2928 - 0 : disable this.
2932 bridge-nf-pass-vlan-input-dev - BOOLEAN
2933 - 1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan
2935 vlan. This allows use of e.g. "iptables -i br0.1" and makes the
2936 REDIRECT target work with vlan-on-top-of-bridge interfaces. When no
2940 - 0: disable bridge netfilter vlan interface lookup.
2947 addip_enable - BOOLEAN
2949 (ADD-IP) functionality specified in RFC5061. This extension provides
2959 pf_enable - INTEGER
2969 https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failover for
2978 pf_expose - INTEGER
2983 SCTP_ADDR_PF state will be sent and a SCTP_PF-state transport info
2986 SCTP_PF state and a SCTP_PF-state transport info can be got via
2988 SCTP_PEER_ADDR_CHANGE event will be sent and it returns -EACCES when
2989 trying to get a SCTP_PF-state transport info via SCTP_GET_PEER_ADDR_INFO
3000 addip_noauth_enable - BOOLEAN
3001 Dynamic Address Reconfiguration (ADD-IP) requires the use of
3006 allowing the ADD-IP extension. For reasons of interoperability,
3011 1 Allow ADD-IP extension to be used without authentication. This
3020 auth_enable - BOOLEAN
3024 (ADD-IP) extension.
3026 - 1: Enable this extension.
3027 - 0: Disable this extension.
3031 prsctp_enable - BOOLEAN
3035 - 1: Enable extension
3036 - 0: Disable
3040 max_burst - INTEGER
3046 association_max_retrans - INTEGER
3053 max_init_retransmits - INTEGER
3054 The maximum number of retransmissions of INIT and COOKIE-ECHO chunks
3060 path_max_retrans - INTEGER
3068 pf_retrans - INTEGER
3076 http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3084 ps_retrans - INTEGER
3086 from section-5 "Primary Path Switchover" in rfc7829. The primary path
3087 will be changed to another active path when the path error counter on
3090 primary destination address becomes active again". Note this feature
3096 rto_initial - INTEGER
3103 rto_max - INTEGER
3109 rto_min - INTEGER
3115 hb_interval - INTEGER
3122 sack_timeout - INTEGER
3128 valid_cookie_life - INTEGER
3134 cookie_preserve_enable - BOOLEAN
3138 - 1: Enable cookie lifetime extension.
3139 - 0: Disable
3143 cookie_hmac_alg - STRING
3145 a listening sctp socket to a connecting client in the INIT-ACK chunk.
3159 rcvbuf_policy - INTEGER
3170 - 1: rcvbuf space is per association
3171 - 0: rcvbuf space is per socket
3175 sndbuf_policy - INTEGER
3178 - 1: Send buffer is tracked per association
3179 - 0: Send buffer is tracked per socket.
3183 sctp_mem - vector of 3 INTEGERs: min, pressure, max
3196 sctp_rmem - vector of 3 INTEGERs: min, default, max
3206 sctp_wmem - vector of 3 INTEGERs: min, default, max
3216 addr_scope_policy - INTEGER
3217 Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00
3219 - 0 - Disable IPv4 address scoping
3220 - 1 - Enable IPv4 address scoping
3221 - 2 - Follow draft but allow IPv4 private addresses
3222 - 3 - Follow draft but allow IPv4 link local addresses
3226 udp_port - INTEGER
3228 using the IANA-assigned UDP port number 9899 (sctp-tunneling).
3230 This UDP sock is used for processing the incoming UDP-encapsulated
3236 for the outgoing UDP-encapsulated SCTP packets. For the dest port,
3241 encap_port - INTEGER
3245 outgoing UDP-encapsulated SCTP packets by default. Users can also
3257 plpmtud_probe_interval - INTEGER
3269 reconf_enable - BOOLEAN
3275 - 1: Enable extension.
3276 - 0: Disable extension.
3280 intl_enable - BOOLEAN
3283 messages sent on different streams. With this feature enabled, I-DATA
3289 - 1: Enable extension.
3290 - 0: Disable extension.
3294 ecn_enable - BOOLEAN
3306 l3mdev_accept - BOOLEAN
3319 Please see: Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.
3325 max_dgram_qlen - INTEGER