From: Narbik Kocharians (narbikk@gmail.com)
Date: Sat Sep 08 2007 - 17:52:52 ART
On the ASBR you can use one of the following, either one will work:
1. distribute-list out
2. summary-address with no-advertise
On 9/8/07, Gregory Gombas <ggombas@gmail.com> wrote:
>
> Hi Lim,
>
> The goal is to filter the route so no router in the specific area you
> want to filter it from will have it in its OSPF database. Distribute
> list is only locally significant :-(
>
> Oh and I forgot to mention stub/totally/NSSA are not allowed for this
> solution :-)
>
> I can't believe OSPF is so inflexible! This is quite easily
> accomplished with any distance vector protocol!
>
>
>
> On 9/8/07, Toh Soon, Lim <tohsoon28@gmail.com> wrote:
> >
> >
> > Hi Gregory,
> >
> > At which point in the network do you want to filter the external routes?
> In
> > multi-area OSPF, you can consider deploying stub, totally stubby or NSSA
> > areas.
> >
> > AFAIK, Type 5 LSAs are flooded to the entire OSPF domain (whichever
> areas
> > that can accept Type 5 LSAs). IMO I don't think we can filter some Type
> 5
> > LSAs on only certain routers due to the fact that they must be identical
> > across the domain. You can try "distribute-list" to prevent them from
> > entering the RIB.
> >
> > Just my 2cents. I may understand it wrongly. Let's hear other opinion.
> >
> >
> > Thank you.
> >
> > B.Rgds,
> > Lim TS
> >
> >
> >
> > On 9/9/07, Gregory Gombas <ggombas@gmail.com> wrote:
> > >
> > > Does anyone know how to filter an ospf external route on a router
> > > other than the ASBR doing the redistribution?
> > >
> > > Oh and by the way, the forwarding address is set to 0.0.0.0.
> > >
> > > Good luck with this one :-)
> > >
> > >
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-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832 www.Net-WorkBooks.com
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