BGP Questions...

Unanswered Question
Jun 10th, 2009


I have a problem with a routes being advertized into my AS from an external peer.

The ASBR is a RR-Server and it's not propagating the routes to it's configured clients.

How come?

The next hop is reachable.

I tried putting the next-hop-self and nothing changed.

what could be some other symptoms?


I also found this in the config:

ip as-path access-list 5 permit ^$

ip as-path access-list 5 permit ^64516$

It's applied to all RR-clients..

Regular expressions are not my favorite, but this mean that if the route didn't originate internally of from private AS 64516 don't advertize??

it's applied outbound on all the clients.


I have this problem too.
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Richard Burts Wed, 06/10/2009 - 03:45


Your understanding of the as-path access-list is correct and if the route did not originate locally or from AS 64516 then it will not be advertised. Is this as-path access-list also configured on your RR server? If so it would explain why routes are not being advertised.




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