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Diffstat (limited to 'doc/bird.sgml')
| -rw-r--r-- | doc/bird.sgml | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml index c1fc3d88..343d016b 100644 --- a/doc/bird.sgml +++ b/doc/bird.sgml @@ -996,16 +996,17 @@ for each neighbor using the following configuration parameters: capability and accepts such requests. Even when disabled, BIRD can send route refresh requests. Default: on. - <tag>ignore communities <m/switch/</tag> RFC 1997 demands that - BGP speaker should process well-known communities like + <tag>interpret communities <m/switch/</tag> RFC 1997 demands + that BGP speaker should process well-known communities like no-export (65535, 65281) or no-advertise (65535, 65282). For example, received route carrying a no-adverise community - should not be advertised to any of its neighbors. BIRD has - such behavior hardwired (it is evaluated when a route is - exported to the protocol just before the export filter). This - option allows to disable such hardwired processing of - well-known communities (in that case, similar behavior can be - implemented in the export filter). Default: off. + should not be advertised to any of its neighbors. If this + option is enabled (which is by default), BIRD has such + behavior automatically (it is evaluated when a route is + exported to the protocol just before the export filter). + Otherwise, this integrated processing of well-known + communities is disabled. In that case, similar behavior can be + implemented in the export filter. Default: on. <tag>enable as4 <m/switch/</tag> BGP protocol was designed to use 2B AS numbers and was extended later to allow 4B AS number. BIRD supports 4B AS extension, |