From: Peter van Oene (pvo@usermail.com)
Date: Wed Oct 16 2002 - 10:16:56 GMT-3
You can filter the _generation_ of type 3 LSA's on the originating ABR, but
you can't filter the reception of LSA's.
At 02:12 PM 10/16/2002 +0100, you wrote:
>you can filter lsa's with ospf filter-list
>
>-----Original Message-----
>From: Peter van Oene [mailto:pvo@usermail.com]
>Sent: 16 October 2002 14:06
>To: Senthil Kumar; Dimitris Vassilopoulos; ccielab@groupstudy.com
>Subject: RE: Filtering OSPF LSA type 3
>
>
>Keep in mind that you can't filter LSAs. You can filter routing
>information as it moves from the LSDB to the local routing table, but not
>the reception and publication of the LSAs to the LSDB. Filtering LSA
>reception would directly violate the specifications and likely lead to
>routing instability as SPF is only effective when everyone looks at the
>same topology.
>
>At 01:58 PM 10/16/2002 +0100, Senthil Kumar wrote:
> >true, but what if you want to filter some lsa-3 only..distribute list might
> >help when introduced on inbound routes at all peers.wont it?
> >
> >-----Original Message-----
> >From: Peter van Oene [mailto:pvo@usermail.com]
> >Sent: 16 October 2002 13:36
> >To: Dimitris Vassilopoulos; ccielab@groupstudy.com
> >Subject: Re: Filtering OSPF LSA type 3
> >
> >
> >All you can do here is use the totally stubby knob on the ABR(s). Once the
> >LSA is in the area, it is mandatory that all area resident routers receive
> >the LSA and correctly process it. Distribute-list in simply prevents any
> >relevant reachability information from making it to the local routing
> >table, but has no effect on LSA's.
> >
> >At 01:35 PM 10/16/2002 +0300, Dimitris Vassilopoulos wrote:
> > >Team,
> > >
> > >Cisco says in
> >
> >http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/12
> >2t/122t4/ftabrt3f.htm
> > >
> > >that if you want to filter OSPF type 3 LSA you have to run 12.2(4)T.
> > >I know that the image running in the lab is 12.1.x
> > >
> > >What if we're asked to filter inbound type 3 LSAs from a BB router?
> > >We must use " distribute-list x in " in EVERY ospf router ?
> > >
> > >Any comment on that would be appreciated...
> > >
> > >Dimitris
> >
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