From: Jack Heney (jheneyccie@xxxxxxxxxxx)
Date: Wed Oct 25 2000 - 16:28:07 GMT-3
You probably couldn't see some of the OSPF routes because the OSPF router
wasn't using them anymore....When the OSPF router initially advertised them
to the IGRP router, the IGRP router (which can violate split-horizon because
you are using a physical interface with frame-relay) advertised them right
back....WHen the OSPF router heard the advertisement (with a lower
administrative distance) from IGRP, it probably added these routes as IGRP
routes, which would stop it from redistributing these routes into
IGRP...When you switched to a multipoint subinterface, split-horizon was
enforced, and the problem was solved...You could have accomplished the same
thing with "ip split-horizon" on the physical interface on the IGRP router.
hth,
Jack
>From: "Roger Dellaca" <rdellaca@bpopca.com>
>Reply-To: "Roger Dellaca" <rdellaca@bpopca.com>
>To: <ccielab@groupstudy.com>
>Subject: OSPF Summarization on FR NBMA - weird problem
>Date: Wed, 25 Oct 2000 11:12:18 -0700
>
>I was doing Expert Redistribution 501 Lab off of Fatkid. I did FR on the
>interface (no subinterfaces) & set ip ospf network point-to-multipoint.
>
>On the IGRP router, I couldn't see some of the OSPF routes, even though I
>had done the necessary summarization to get them to the same mask as the
>IGRP.
>
>The solution used multipoint interface - I changed mine to that & it
>worked! - with no other changes! Is Is that a known thing with OSPF?
>
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