Re: OSPF Learned Routes

Dear,AD is effective locally. If you want R3 has BGP route, you should
change AD at R3,too.

best regards.

2009/5/6 Joe Astorino <joe_astorino_at_comcast.net>

> 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 Wed May 06 2009 - 10:17:17 ART