From: Shine Joseph (shinepjoseph@iprimus.com.au)
Date: Sat Sep 08 2007 - 18:05:08 ART
Did you consider area filter-list?
Regards,
Shine
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Gregory Gombas
Sent: Sunday, 9 September 2007 6:22 AM
To: Toh Soon, Lim
Cc: groupstudy
Subject: Re: Filtering OSPF external routes - tough one
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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