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authorTrisha Biswas <tbiswas@fastly.com>2023-04-14 04:28:37 +0200
committerOndrej Zajicek <santiago@crfreenet.org>2023-04-14 04:28:37 +0200
commit9e44ace3928a19560058dc713fcbff3a8bad3b3c (patch)
treea67a8a28a0b2c8a394a948977fbecaef7f7e1de1 /doc
parentdc139fb6438f0864e83a9dc71e7c212c5acaf3ef (diff)
BGP: Add 'allow bgp_med' option for EBGP sessions
This option allows to treat bgp_med as regular transitive attribute on EBGP sessions (without hacks in filters). Minor changes from committer.
Diffstat (limited to 'doc')
-rw-r--r--doc/bird.sgml15
1 files changed, 11 insertions, 4 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index f75fa9fe..557140b8 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2625,12 +2625,19 @@ using the following configuration parameters:
keeps MED attribute). Default: disabled.
<tag><label id="bgp-allow-local-pref">allow bgp_local_pref <m/switch/</tag>
- A standard BGP implementation do not send the Local Preference attribute
- to eBGP neighbors and ignore this attribute if received from eBGP
+ Standard BGP implementations do not send the Local Preference attribute
+ to EBGP neighbors and ignore this attribute if received from EBGP
neighbors, as per <rfc id="4271">. When this option is enabled on an
- eBGP session, this attribute will be sent to and accepted from the peer,
+ EBGP session, this attribute will be sent to and accepted from the peer,
which is useful for example if you have a setup like in <rfc id="7938">.
- The option does not affect iBGP sessions. Default: off.
+ The option does not affect IBGP sessions. Default: off.
+
+ <tag><label id="bgp-allow-med">allow bgp_med <m/switch/</tag>
+ Standard BGP implementations do not propagate the MULTI_EXIT_DESC
+ attribute unless it is configured locally. When this option is enabled
+ on an EBGP session, this attribute will be sent to the peer regardless,
+ which is useful for example if you have a setup like in <rfc id="7938">.
+ The option does not affect IBGP sessions. Default: off.
<tag><label id="bgp-allow-local-as">allow local as [<m/number/]</tag>
BGP prevents routing loops by rejecting received routes with the local