[tech] The BGP experiment...

David Luyer david_luyer at pacific.net.au
Fri Feb 15 20:39:10 WST 2002


Adrian wrote (re: iBGP not propogating routes):

> Does zebra have a 'no sync' option like the cisco
> routers do?

Separately, are the connections in route-reflector-client
mode?  If not they won't propogate iBGP-learnt routes
because by default iBGP is meant to be fully meshed.

Also are you using next-hop-self?  With next-hop-self and
a route to the next hop, you shouldn't have any next-hop
issues.  Although sometimes next-hop-self doesn't work with
iBGP since it's intended for eBGP, and then you have to use
an incoming route-map remapping the next hop (because
usually when next-hop-self isn't effective, outgoing route-map
next hop setting isn't effective).

This all applies to Ciscos but half of what applies to Ciscos
applies to Zebra.

All your eBGP peers should have next-hop-self set at the remote
and and all your iBGP peers should probably be route reflectors
(depending on topology).

David.



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