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ebgp multihop thru cisco asa

Posted on 2011-09-18
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Last Modified: 2012-05-12
I am trying to peer two routers vie ebgp multihop.  each peer router is being a cisco asa firewall. The peer routers can ping each other and I have allowed tcp 179 on both ASA's but I still don't have a successful neighborship?  Am I missing something?

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Question by:FREDARCE
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Expert Comment

by:jmeggers
ID: 36560021
TCP /179 is correct.  Only thing I can think of is be careful of NATing and what address is being used to establish the peer relationship.  You might do some debugs on the routers to identify what BGP is trying to do, and you might also look at the ASA logs to identify what traffic is being blocked.
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Author Comment

by:FREDARCE
ID: 36564682
I am using any nat on either ASA.  changed logging to debug but don't see anything in the logs.  I would at least expect to see deny attempts made on tcp/179.  how can I ensure that the peer routers are at least trying to establish a neighborship?

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Accepted Solution

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FREDARCE earned 0 total points
ID: 36569545
turns out my problem was I was relying on a default route for return traffic on each of the neighbor routers and what I needed to do was add a specific static route instead.  Once I added the static route bgp neighborship came up.
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Author Closing Comment

by:FREDARCE
ID: 36594722
turns out my problem was I was relying on a default route for return traffic on each of the neighbor routers and what I needed to do was add a specific static route instead.  Once I added the static route bgp neighborship came up.
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Expert Comment

by:jmeggers
ID: 36569951
Forgot about the default route. BGP won't establish without an explicit route.
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