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Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index d2a4fc14..aeea613f 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -2405,6 +2405,15 @@ using the following configuration parameters: malformed and corresponding BGP updates are treated as withdraws. Default: on. + <tag><label id="bgp-enforce-first-as">enforce first as [<m/switch/]</tag> + Routes received from an EBGP neighbor are generally expected to have the + first (leftmost) AS number in their AS path equal to the neighbor AS + number. This is not enforced by default as there are legitimate cases + where it is not true, e.g. connections to route servers. When this + option is enabled, routes with non-matching first AS number are rejected + and corresponding updates are treated as withdraws. The option is valid + on EBGP sessions only. Default: off. + <tag><label id="bgp-enable-route-refresh">enable route refresh <m/switch/</tag> After the initial route exchange, BGP protocol uses incremental updates to keep BGP speakers synchronized. Sometimes (e.g., if BGP speaker |