Lines Matching +full:tx +full:- +full:ping +full:- +full:pong
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
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
712 tcp_rfc1337 - BOOLEAN
719 tcp_rmem - vector of 3 INTEGERs: min, default, max
738 tcp_sack - BOOLEAN
741 tcp_comp_sack_delay_ns - LONG INTEGER
748 tcp_comp_sack_slack_ns - LONG INTEGER
756 tcp_comp_sack_nr - INTEGER
762 tcp_backlog_ack_defer - BOOLEAN
769 tcp_slow_start_after_idle - BOOLEAN
777 tcp_stdurg - BOOLEAN
784 tcp_synack_retries - INTEGER
791 tcp_syncookies - INTEGER
816 tcp_migrate_req - BOOLEAN
818 the initial SYN packet is received during the three-way handshake.
819 When a listener is closed, in-flight request sockets during the
841 tcp_fastopen - INTEGER
852 the option value being the length of the syn-data backlog.
860 application before 3-way handshake finishes.
863 0x200 (server) accept data-in-SYN w/o any cookie option present.
873 tcp_fastopen_blackhole_timeout_sec - INTEGER
877 get detected right after Fastopen is re-enabled and will reset to
883 tcp_fastopen_key - list of comma separated 32-digit hexadecimal INTEGERs
894 per-socket keys will be used instead of any keys that are specified via
897 A key is specified as 4 8-digit hexadecimal integers which are separated
898 by a '-' as: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx. Leading zeros may be
903 tcp_syn_retries - INTEGER
911 tcp_timestamps - INTEGER
914 - 0: Disabled.
915 - 1: Enable timestamps as defined in RFC1323 and use random offset for
917 - 2: Like 1, but without random offsets.
921 tcp_min_tso_segs - INTEGER
924 Since linux-3.12, TCP does an automatic sizing of TSO frames,
932 tcp_tso_rtt_log - INTEGER
935 Starting from linux-5.18, TCP autosizing can be tweaked
941 tso_packet_size = sk->sk_pacing_rate / 1024;
955 tcp_pacing_ss_ratio - INTEGER
956 sk->sk_pacing_rate is set by TCP stack using a ratio applied
964 tcp_pacing_ca_ratio - INTEGER
965 sk->sk_pacing_rate is set by TCP stack using a ratio applied
972 tcp_syn_linear_timeouts - INTEGER
982 tcp_tso_win_divisor - INTEGER
990 tcp_tw_reuse - INTEGER
991 Enable reuse of TIME-WAIT sockets for new connections when it is
994 - 0 - disable
995 - 1 - global enable
996 - 2 - enable for loopback traffic only
1003 tcp_window_scaling - BOOLEAN
1006 tcp_shrink_window - BOOLEAN
1013 - 0 - Disabled. The window is never shrunk.
1014 - 1 - Enabled. The window is shrunk when necessary to remain within
1016 This only occurs if a non-zero receive window
1021 tcp_wmem - vector of 3 INTEGERs: min, default, max
1042 tcp_notsent_lowat - UNSIGNED INTEGER
1055 tcp_workaround_signed_windows - BOOLEAN
1063 tcp_thin_linear_timeouts - BOOLEAN
1070 non-aggressive thin streams, often found to be time-dependent.
1072 Documentation/networking/tcp-thin.rst
1076 tcp_limit_output_bytes - INTEGER
1088 tcp_challenge_ack_limit - INTEGER
1090 in RFC 5961 (Improving TCP's Robustness to Blind In-Window Attacks)
1096 tcp_ehash_entries - INTEGER
1103 tcp_child_ehash_entries - INTEGER
1121 Possible values: 0, 2^n (n: 0 - 24 (16Mi))
1125 tcp_plb_enabled - BOOLEAN
1136 field, and currently no-op for IPv4 headers. It is possible
1149 tcp_plb_idle_rehash_rounds - INTEGER
1155 Possible Values: 0 - 31
1159 tcp_plb_rehash_rounds - INTEGER
1166 Possible Values: 0 - 31
1170 tcp_plb_suspend_rto_sec - INTEGER
1178 Possible Values: 0 - 255
1182 tcp_plb_cong_thresh - INTEGER
1187 The 0-1 fraction range is mapped to 0-256 range to avoid floating
1196 Possible Values: 0 - 256
1200 tcp_pingpong_thresh - INTEGER
1203 "ping-pong" (request-response) connection for which delayed
1209 Possible Values: 1 - 255
1213 tcp_rto_min_us - INTEGER
1222 Possible Values: 1 - INT_MAX
1229 udp_l3mdev_accept - BOOLEAN
1238 udp_mem - vector of 3 INTEGERs: min, pressure, max
1249 udp_rmem_min - INTEGER
1256 udp_wmem_min - INTEGER
1257 UDP does not have tx memory accounting and this tunable has no effect.
1259 udp_hash_entries - INTEGER
1266 udp_child_ehash_entries - INTEGER
1281 Possible values: 0, 2^n (n: 7 (128) - 16 (64K))
1289 raw_l3mdev_accept - BOOLEAN
1301 cipso_cache_enable - BOOLEAN
1310 cipso_cache_bucket_size - INTEGER
1320 cipso_rbm_optfmt - BOOLEAN
1324 categories in order to make the packet data 32-bit aligned.
1328 cipso_rbm_structvalid - BOOLEAN
1341 ip_local_port_range - 2 INTEGERS
1350 ip_local_reserved_ports - list of comma separated ranges
1351 Specify the ports which are reserved for known third-party
1357 list of ranges (e.g. "1,2-4,10-10" for ports 1, 2, 3, 4 and
1383 ip_unprivileged_port_start - INTEGER
1384 This is a per-namespace sysctl. It defines the first
1392 ip_nonlocal_bind - BOOLEAN
1393 If set, allows processes to bind() to non-local IP addresses,
1394 which can be quite useful - but may break some applications.
1398 ip_autobind_reuse - BOOLEAN
1407 ip_dynaddr - INTEGER
1408 If set non-zero, enables support for dynamic addresses.
1409 If set to a non-zero value larger than 1, a kernel log
1415 ip_early_demux - BOOLEAN
1425 ping_group_range - 2 INTEGERS
1428 create ping sockets. Setting it to "100 100" would grant permissions
1432 tcp_early_demux - BOOLEAN
1437 udp_early_demux - BOOLEAN
1443 icmp_echo_ignore_all - BOOLEAN
1444 If set non-zero, then the kernel will ignore all ICMP ECHO
1449 icmp_echo_enable_probe - BOOLEAN
1455 icmp_echo_ignore_broadcasts - BOOLEAN
1456 If set non-zero, then the kernel will ignore all ICMP ECHO and
1461 icmp_ratelimit - INTEGER
1471 icmp_msgs_per_sec - INTEGER
1479 icmp_msgs_burst - INTEGER
1486 icmp_ratemask - INTEGER
1513 icmp_ignore_bogus_error_responses - BOOLEAN
1521 icmp_errors_use_inbound_ifaddr - BOOLEAN
1526 If non-zero, the message will be sent with the primary address of
1533 then the primary address of the first non-loopback interface that
1538 igmp_max_memberships - INTEGER
1550 M = 65536-sizeof (ip header)/(sizeof(Group record))
1555 (65536-24) / 12 = 5459
1560 igmp_max_msf - INTEGER
1566 igmp_qrv - INTEGER
1573 force_igmp_version - INTEGER
1574 - 0 - (default) No enforcement of a IGMP version, IGMPv1/v2 fallback
1577 - 1 - Enforce to use IGMP version 1. Will also reply IGMPv1 report if
1579 - 2 - Enforce to use IGMP version 2. Will fallback to IGMPv1 if receive
1581 - 3 - Enforce to use IGMP version 3. The same react with default 0.
1597 log_martians - BOOLEAN
1603 accept_redirects - BOOLEAN
1607 - both conf/{all,interface}/accept_redirects are TRUE in the case
1612 - at least one of conf/{all,interface}/accept_redirects is TRUE in the
1619 - TRUE (host)
1620 - FALSE (router)
1622 forwarding - BOOLEAN
1626 mc_forwarding - BOOLEAN
1632 medium_id - INTEGER
1637 to its medium, value of -1 means that medium is not known.
1643 proxy_arp - BOOLEAN
1650 proxy_arp_pvlan - BOOLEAN
1668 Hewlett-Packard call it Source-Port filtering or port-isolation.
1669 Ericsson call it MAC-Forced Forwarding (RFC Draft).
1671 proxy_delay - INTEGER
1679 shared_media - BOOLEAN
1689 secure_redirects - BOOLEAN
1702 send_redirects - BOOLEAN
1711 bootp_relay - BOOLEAN
1722 accept_source_route - BOOLEAN
1729 - TRUE (router)
1730 - FALSE (host)
1732 accept_local - BOOLEAN
1738 route_localnet - BOOLEAN
1744 rp_filter - INTEGER
1745 - 0 - No source validation.
1746 - 1 - Strict mode as defined in RFC3704 Strict Reverse Path
1750 - 2 - Loose mode as defined in RFC3704 Loose Reverse Path
1765 src_valid_mark - BOOLEAN
1766 - 0 - The fwmark of the packet is not included in reverse path
1771 - 1 - The fwmark of the packet is included in reverse path route
1784 arp_filter - BOOLEAN
1785 - 1 - Allows you to have multiple network interfaces on the same
1792 - 0 - (default) The kernel can respond to arp requests with addresses
1796 particular interfaces. Only for more complex setups like load-
1803 arp_announce - INTEGER
1808 - 0 - (default) Use any local address, configured on any interface
1809 - 1 - Try to avoid local addresses that are not in the target's
1818 - 2 - Always use the best local address for this target.
1835 arp_ignore - INTEGER
1839 - 0 - (default): reply for any local target IP address, configured
1841 - 1 - reply only if the target IP address is local address
1843 - 2 - reply only if the target IP address is local address
1846 - 3 - do not reply for local addresses configured with scope host,
1848 - 4-7 - reserved
1849 - 8 - do not reply for all local addresses
1854 arp_notify - BOOLEAN
1863 arp_accept - INTEGER
1867 - 0 - don't create new entries in the ARP table
1868 - 1 - create new entries in the ARP table
1869 - 2 - create new entries only if the source IP address is in the same
1880 arp_evict_nocarrier - BOOLEAN
1886 - 1 - (default): Clear the ARP cache on NOCARRIER events
1887 - 0 - Do not clear ARP cache on NOCARRIER events
1889 mcast_solicit - INTEGER
1894 ucast_solicit - INTEGER
1898 app_solicit - INTEGER
1903 mcast_resolicit - INTEGER
1907 disable_policy - BOOLEAN
1910 disable_xfrm - BOOLEAN
1913 igmpv2_unsolicited_report_interval - INTEGER
1919 igmpv3_unsolicited_report_interval - INTEGER
1925 ignore_routes_with_linkdown - BOOLEAN
1928 promote_secondaries - BOOLEAN
1933 drop_unicast_in_l2_multicast - BOOLEAN
1934 Drop any unicast IP packets that are received in link-layer
1942 drop_gratuitous_arp - BOOLEAN
1950 tag - INTEGER
1955 xfrm4_gc_thresh - INTEGER
1956 (Obsolete since linux-4.14)
1961 igmp_link_local_mcast_reports - BOOLEAN
1972 - Andi Kleen
1974 - Nicolas Delon
1986 bindv6only - BOOLEAN
1991 - TRUE: disable IPv4-mapped address feature
1992 - FALSE: enable IPv4-mapped address feature
1996 flowlabel_consistency - BOOLEAN
2001 - TRUE: enabled
2002 - FALSE: disabled
2006 auto_flowlabels - INTEGER
2025 flowlabel_state_ranges - BOOLEAN
2026 Split the flow label number space into two ranges. 0-0x7FFFF is
2027 reserved for the IPv6 flow manager facility, 0x80000-0xFFFFF
2030 - TRUE: enabled
2031 - FALSE: disabled
2035 flowlabel_reflect - INTEGER
2039 https://tools.ietf.org/html/draft-wang-6man-flow-label-reflection-01
2043 - 1: enabled for established flows
2046 in "tcp: change IPv6 flow-label upon receiving spurious retransmission"
2049 - 2: enabled for TCP RESET packets (no active listener)
2053 - 4: enabled for ICMPv6 echo reply messages.
2057 fib_multipath_hash_policy - INTEGER
2064 - 0 - Layer 3 (source and destination addresses plus flow label)
2065 - 1 - Layer 4 (standard 5-tuple)
2066 - 2 - Layer 3 or inner Layer 3 if present
2067 - 3 - Custom multipath hash. Fields used for multipath hash calculation
2070 fib_multipath_hash_fields - UNSIGNED INTEGER
2097 anycast_src_echo_reply - BOOLEAN
2101 - TRUE: enabled
2102 - FALSE: disabled
2106 idgen_delay - INTEGER
2113 idgen_retries - INTEGER
2119 mld_qrv - INTEGER
2126 max_dst_opts_number - INTEGER
2127 Maximum number of non-padding TLVs allowed in a Destination
2134 max_hbh_opts_number - INTEGER
2135 Maximum number of non-padding TLVs allowed in a Hop-by-Hop
2142 max_dst_opts_length - INTEGER
2148 max_hbh_length - INTEGER
2149 Maximum length allowed for a Hop-by-Hop options extension
2154 skip_notify_on_dev_down - BOOLEAN
2163 nexthop_compat_mode - BOOLEAN
2175 fib_notify_on_flag_change - INTEGER
2186 The notifications will indicate to user-space the state of the route.
2192 - 0 - Do not emit notifications.
2193 - 1 - Emit notifications.
2194 - 2 - Emit notifications only for RTM_F_OFFLOAD_FAILED flag change.
2196 ioam6_id - INTEGER
2204 ioam6_id_wide - LONG INTEGER
2215 ip6frag_high_thresh - INTEGER
2221 ip6frag_low_thresh - INTEGER
2224 ip6frag_time - INTEGER
2228 Change the interface-specific default settings.
2234 Change all the interface-specific settings.
2238 conf/all/disable_ipv6 - BOOLEAN
2240 setting and also all per-interface ``disable_ipv6`` settings to the same
2248 conf/all/forwarding - BOOLEAN
2259 proxy_ndp - BOOLEAN
2262 fwmark_reflect - BOOLEAN
2263 Controls the fwmark of kernel-generated IPv6 reply packets that are not
2276 accept_ra - INTEGER
2295 - enabled if local forwarding is disabled.
2296 - disabled if local forwarding is enabled.
2298 accept_ra_defrtr - BOOLEAN
2303 - enabled if accept_ra is enabled.
2304 - disabled if accept_ra is disabled.
2306 ra_defrtr_metric - UNSIGNED INTEGER
2316 accept_ra_from_local - BOOLEAN
2317 Accept RA with source-address that is found on local machine
2320 Default is to NOT accept these as it may be an un-intended
2325 - enabled if accept_ra_from_local is enabled
2327 - disabled if accept_ra_from_local is disabled
2330 accept_ra_min_hop_limit - INTEGER
2338 accept_ra_min_lft - INTEGER
2346 accept_ra_pinfo - BOOLEAN
2351 - enabled if accept_ra is enabled.
2352 - disabled if accept_ra is disabled.
2354 ra_honor_pio_life - BOOLEAN
2359 - If enabled, the PIO valid lifetime will always be honored.
2360 - If disabled, RFC4862 section 5.5.3e is used to determine
2365 ra_honor_pio_pflag - BOOLEAN
2366 The Prefix Information Option P-flag indicates the network can
2367 allocate a unique IPv6 prefix per client using DHCPv6-PD.
2368 This sysctl can be enabled when a userspace DHCPv6-PD client
2369 is running to cause the P-flag to take effect: i.e. the
2370 P-flag suppresses any effects of the A-flag within the same
2373 - If disabled, the P-flag is ignored.
2374 - If enabled, the P-flag will disable SLAAC autoconfiguration
2379 accept_ra_rt_info_min_plen - INTEGER
2388 * -1 if accept_ra_rtr_pref is disabled.
2390 accept_ra_rt_info_max_plen - INTEGER
2399 * -1 if accept_ra_rtr_pref is disabled.
2401 accept_ra_rtr_pref - BOOLEAN
2406 - enabled if accept_ra is enabled.
2407 - disabled if accept_ra is disabled.
2409 accept_ra_mtu - BOOLEAN
2415 - enabled if accept_ra is enabled.
2416 - disabled if accept_ra is disabled.
2418 accept_redirects - BOOLEAN
2423 - enabled if local forwarding is disabled.
2424 - disabled if local forwarding is enabled.
2426 accept_source_route - INTEGER
2429 - >= 0: Accept only routing header type 2.
2430 - < 0: Do not accept routing header.
2434 autoconf - BOOLEAN
2440 - enabled if accept_ra_pinfo is enabled.
2441 - disabled if accept_ra_pinfo is disabled.
2443 dad_transmits - INTEGER
2448 forwarding - INTEGER
2449 Configure interface-specific Host/Router behaviour.
2458 - 0 Forwarding disabled
2459 - 1 Forwarding enabled
2485 hop_limit - INTEGER
2490 mtu - INTEGER
2495 ip_nonlocal_bind - BOOLEAN
2496 If set, allows processes to bind() to non-local IPv6 addresses,
2497 which can be quite useful - but may break some applications.
2501 router_probe_interval - INTEGER
2507 router_solicitation_delay - INTEGER
2513 router_solicitation_interval - INTEGER
2518 router_solicitations - INTEGER
2524 use_oif_addrs_only - BOOLEAN
2531 use_tempaddr - INTEGER
2543 * -1 (for point-to-point devices and loopback devices)
2545 temp_valid_lft - INTEGER
2547 minimum required lifetime (typically 5-7 seconds), temporary addresses
2552 temp_prefered_lft - INTEGER
2555 5-7 seconds), the preferred lifetime is the minimum required. If
2561 keep_addr_on_down - INTEGER
2571 max_desync_factor - INTEGER
2579 regen_min_advance - INTEGER
2589 regen_max_retry - INTEGER
2595 max_addresses - INTEGER
2603 disable_ipv6 - BOOLEAN
2605 will be dynamically set to TRUE if DAD fails for the link-local
2611 it will dynamically create a link-local address on the given
2619 accept_dad - INTEGER
2625 2 Enable DAD, and disable IPv6 operation if MAC-based duplicate
2626 link-local address has been found.
2632 force_tllao - BOOLEAN
2633 Enable sending the target link-layer address option even when
2638 Quoting from RFC 2461, section 4.4, Target link-layer address:
2644 omitted since the sender of the solicitation has the correct link-
2646 solicitation in the first place. However, including the link-layer
2648 race condition where the sender deletes the cached link-layer address
2651 ndisc_notify - BOOLEAN
2654 * 0 - (default): do nothing
2655 * 1 - Generate unsolicited neighbour advertisements when device is brought
2658 ndisc_tclass - INTEGER
2666 * 0 - (default)
2668 ndisc_evict_nocarrier - BOOLEAN
2674 - 1 - (default): Clear neighbor discover cache on NOCARRIER events.
2675 - 0 - Do not clear neighbor discovery cache on NOCARRIER events.
2677 mldv1_unsolicited_report_interval - INTEGER
2683 mldv2_unsolicited_report_interval - INTEGER
2689 force_mld_version - INTEGER
2690 * 0 - (default) No enforcement of a MLD version, MLDv1 fallback allowed
2691 * 1 - Enforce to use MLD version 1
2692 * 2 - Enforce to use MLD version 2
2694 suppress_frag_ndisc - INTEGER
2698 * 1 - (default) discard fragmented neighbor discovery packets
2699 * 0 - allow fragmented neighbor discovery packets
2701 optimistic_dad - BOOLEAN
2711 use_optimistic - BOOLEAN
2723 stable_secret - IPv6 address
2725 addresses for link-local addresses and autoconfigured
2728 addrgenmode ip-link. conf/default/stable_secret is used as the
2737 addr_gen_mode - INTEGER
2738 Defines how link-local and autoconf addresses are generated.
2742 1 do no generate a link-local address, use EUI64 for addresses
2749 drop_unicast_in_l2_multicast - BOOLEAN
2750 Drop any unicast IPv6 packets that are received in link-layer
2755 drop_unsolicited_na - BOOLEAN
2762 accept_untracked_na - INTEGER
2766 - 0 - (default) Do not accept unsolicited and untracked neighbor
2769 - 1 - Add a new neighbor cache entry in STALE state for routers on
2771 with target link-layer address option specified if no neighbor entry
2776 This is as per router-side behavior documented in RFC9131.
2780 This will optimize the return path for the initial off-link
2782 ensuring that the first-hop router which turns on this setting doesn't
2783 have to buffer the initial return packets to do neighbor-solicitation.
2789 - 2 - Extend option (1) to add a new neighbor cache entry only if the
2793 enhanced_dad - BOOLEAN
2806 ratelimit - INTEGER
2814 ratemask - list of comma separated ranges
2819 list of ranges (e.g. "0-127,129" for ICMPv6 message type 0 to 127 and
2823 Refer to: https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml
2827 Default: 0-1,3-127 (rate limit ICMPv6 errors except Packet Too Big)
2829 echo_ignore_all - BOOLEAN
2830 If set non-zero, then the kernel will ignore all ICMP ECHO
2835 echo_ignore_multicast - BOOLEAN
2836 If set non-zero, then the kernel will ignore all ICMP ECHO
2841 echo_ignore_anycast - BOOLEAN
2842 If set non-zero, then the kernel will ignore all ICMP ECHO
2847 error_anycast_as_unicast - BOOLEAN
2854 xfrm6_gc_thresh - INTEGER
2855 (Obsolete since linux-4.14)
2863 YOSHIFUJI Hideaki / USAGI Project <yoshfuji@linux-ipv6.org>
2869 bridge-nf-call-arptables - BOOLEAN
2870 - 1 : pass bridged ARP traffic to arptables' FORWARD chain.
2871 - 0 : disable this.
2875 bridge-nf-call-iptables - BOOLEAN
2876 - 1 : pass bridged IPv4 traffic to iptables' chains.
2877 - 0 : disable this.
2881 bridge-nf-call-ip6tables - BOOLEAN
2882 - 1 : pass bridged IPv6 traffic to ip6tables' chains.
2883 - 0 : disable this.
2887 bridge-nf-filter-vlan-tagged - BOOLEAN
2888 - 1 : pass bridged vlan-tagged ARP/IP/IPv6 traffic to {arp,ip,ip6}tables.
2889 - 0 : disable this.
2893 bridge-nf-filter-pppoe-tagged - BOOLEAN
2894 - 1 : pass bridged pppoe-tagged IP/IPv6 traffic to {ip,ip6}tables.
2895 - 0 : disable this.
2899 bridge-nf-pass-vlan-input-dev - BOOLEAN
2900 - 1: if bridge-nf-filter-vlan-tagged is enabled, try to find a vlan
2902 vlan. This allows use of e.g. "iptables -i br0.1" and makes the
2903 REDIRECT target work with vlan-on-top-of-bridge interfaces. When no
2907 - 0: disable bridge netfilter vlan interface lookup.
2914 addip_enable - BOOLEAN
2916 (ADD-IP) functionality specified in RFC5061. This extension provides
2926 pf_enable - INTEGER
2936 https://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-failover for
2945 pf_expose - INTEGER
2950 SCTP_ADDR_PF state will be sent and a SCTP_PF-state transport info
2953 SCTP_PF state and a SCTP_PF-state transport info can be got via
2955 SCTP_PEER_ADDR_CHANGE event will be sent and it returns -EACCES when
2956 trying to get a SCTP_PF-state transport info via SCTP_GET_PEER_ADDR_INFO
2967 addip_noauth_enable - BOOLEAN
2968 Dynamic Address Reconfiguration (ADD-IP) requires the use of
2973 allowing the ADD-IP extension. For reasons of interoperability,
2978 1 Allow ADD-IP extension to be used without authentication. This
2987 auth_enable - BOOLEAN
2991 (ADD-IP) extension.
2993 - 1: Enable this extension.
2994 - 0: Disable this extension.
2998 prsctp_enable - BOOLEAN
3002 - 1: Enable extension
3003 - 0: Disable
3007 max_burst - INTEGER
3013 association_max_retrans - INTEGER
3020 max_init_retransmits - INTEGER
3021 The maximum number of retransmissions of INIT and COOKIE-ECHO chunks
3027 path_max_retrans - INTEGER
3035 pf_retrans - INTEGER
3043 http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
3051 ps_retrans - INTEGER
3053 from section-5 "Primary Path Switchover" in rfc7829. The primary path
3063 rto_initial - INTEGER
3070 rto_max - INTEGER
3076 rto_min - INTEGER
3082 hb_interval - INTEGER
3089 sack_timeout - INTEGER
3095 valid_cookie_life - INTEGER
3101 cookie_preserve_enable - BOOLEAN
3105 - 1: Enable cookie lifetime extension.
3106 - 0: Disable
3110 cookie_hmac_alg - STRING
3112 a listening sctp socket to a connecting client in the INIT-ACK chunk.
3126 rcvbuf_policy - INTEGER
3137 - 1: rcvbuf space is per association
3138 - 0: rcvbuf space is per socket
3142 sndbuf_policy - INTEGER
3145 - 1: Send buffer is tracked per association
3146 - 0: Send buffer is tracked per socket.
3150 sctp_mem - vector of 3 INTEGERs: min, pressure, max
3163 sctp_rmem - vector of 3 INTEGERs: min, default, max
3173 sctp_wmem - vector of 3 INTEGERs: min, default, max
3183 addr_scope_policy - INTEGER
3184 Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00
3186 - 0 - Disable IPv4 address scoping
3187 - 1 - Enable IPv4 address scoping
3188 - 2 - Follow draft but allow IPv4 private addresses
3189 - 3 - Follow draft but allow IPv4 link local addresses
3193 udp_port - INTEGER
3195 using the IANA-assigned UDP port number 9899 (sctp-tunneling).
3197 This UDP sock is used for processing the incoming UDP-encapsulated
3203 for the outgoing UDP-encapsulated SCTP packets. For the dest port,
3208 encap_port - INTEGER
3212 outgoing UDP-encapsulated SCTP packets by default. Users can also
3224 plpmtud_probe_interval - INTEGER
3236 reconf_enable - BOOLEAN
3242 - 1: Enable extension.
3243 - 0: Disable extension.
3247 intl_enable - BOOLEAN
3250 messages sent on different streams. With this feature enabled, I-DATA
3256 - 1: Enable extension.
3257 - 0: Disable extension.
3261 ecn_enable - BOOLEAN
3273 l3mdev_accept - BOOLEAN
3286 Please see: Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.
3292 max_dgram_qlen - INTEGER