diff options
Diffstat (limited to 'Documentation/networking/ip-sysctl.rst')
| -rw-r--r-- | Documentation/networking/ip-sysctl.rst | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst index 66828293d9cb..04216564a03c 100644 --- a/Documentation/networking/ip-sysctl.rst +++ b/Documentation/networking/ip-sysctl.rst @@ -2474,6 +2474,28 @@ drop_unsolicited_na - BOOLEAN By default this is turned off. +accept_untracked_na - BOOLEAN + Add a new neighbour cache entry in STALE state for routers on receiving a + neighbour advertisement (either solicited or unsolicited) with target + link-layer address option specified if no neighbour entry is already + present for the advertised IPv6 address. Without this knob, NAs received + for untracked addresses (absent in neighbour cache) are silently ignored. + + This is as per router-side behaviour documented in RFC9131. + + This has lower precedence than drop_unsolicited_na. + + This will optimize the return path for the initial off-link communication + that is initiated by a directly connected host, by ensuring that + the first-hop router which turns on this setting doesn't have to + buffer the initial return packets to do neighbour-solicitation. + The prerequisite is that the host is configured to send + unsolicited neighbour advertisements on interface bringup. + This setting should be used in conjunction with the ndisc_notify setting + on the host to satisfy this prerequisite. + + By default this is turned off. + enhanced_dad - BOOLEAN Include a nonce option in the IPv6 neighbor solicitation messages used for duplicate address detection per RFC7527. A received DAD NS will only signal |