From: Gregory Gombas (ggombas@gmail.com)
Date: Sat Sep 08 2007 - 17:54:58 ART
Sorry, the restriction is you cannot do the filtering from the ASBR
doing the redistribution. You can do it on any other router...
Any thoughts?
On 9/8/07, Narbik Kocharians <narbikk@gmail.com> wrote:
> 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
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