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-rw-r--r--doc/bird.sgml17
1 files changed, 9 insertions, 8 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index c1fc3d8..343d016 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,