RE: OSPF Learned Routes

That is correct. Even if the routes are not be making it into the route
table, the OSPF neighbors are still exchanging network and router LSA's.

David Clark
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________________________________

From: nobody_at_groupstudy.com on behalf of Joe Astorino
Sent: Tue 5/5/2009 7:02 PM
To: CCIE Groupstudy
Subject: OSPF Learned Routes

I have a quick question on something I never particuarly noticed before.

Assume you have R1, and R2. They peer via iBGP as well as OSPF. R2 also peers
up with R3 via OSPF only. On R2 you have set the AD for iBGP routes to 50 so
they are preferred over OSPF.

However, even though you have routes on R2 learned via R1 through iBGP in the
routing table with AD 50, R3 still has the routes learned from R2 as OSPF
routes.

This sort of confused me because they are not OSPF routes on R2 but are still
being advertised to R3 in OSPF. The only thing I am thinking is that even
though they are not OSPF routes on R2, it still passes the LSAs to R3 and R3
still runs SPF and puts the routes in the routing table.

Can anybody verify what is happening there?

"He not busy being born is busy dying" -- Dylan

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Received on Tue May 05 2009 - 19:26:32 ART