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Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index aa16c227..a62d3371 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -1943,6 +1943,8 @@ configuration is often sufficient. <p>Note that to use BFD for other protocols like OSPF or BGP, these protocols also have to be configured to request BFD sessions, usually by <cf/bfd/ option. +In BGP case, it is also possible to specify per-peer BFD session options (e.g. +rx/tx intervals) as a part of the <cf/bfd/ option. <p>A BFD instance not associated with any VRF handles session requests from all other protocols, even ones associated with a VRF. Such setup would work for @@ -2315,14 +2317,17 @@ using the following configuration parameters: immediately shut down. Note that this option cannot be used with multihop BGP. Default: enabled for direct BGP, disabled otherwise. - <tag><label id="bgp-bfd">bfd <M>switch</M>|graceful</tag> + <tag><label id="bgp-bfd">bfd <M>switch</M>|graceful| { <m/options/ }</tag> BGP could use BFD protocol as an advisory mechanism for neighbor liveness and failure detection. If enabled, BIRD setups a BFD session for the BGP neighbor and tracks its liveness by it. This has an advantage of an order of magnitude lower detection times in case of failure. When a neighbor failure is detected, the BGP session is restarted. Optionally, it can be configured (by <cf/graceful/ argument) - to trigger graceful restart instead of regular restart. Note that BFD + to trigger graceful restart instead of regular restart. It is also + possible to specify section with per-peer BFD session options instead of + just switch argument. Most BFD session specific options are allowed here + with the exception of authentication options. here Note that BFD protocol also has to be configured, see <ref id="bfd" name="BFD"> section for details. Default: disabled. |