From: Peter van Oene (pvo@usermail.com)
Date: Thu Oct 17 2002 - 18:27:46 GMT-3
Ok thanks. I wasn't sure if you meant you could filter the reception of
LSAs as well as the origination of LSAs on some platforms.
At 01:39 PM 10/17/2002 -0700, Nathan Chessin wrote:
>Peter,
>
>There is a filter-list that you can use to filter Type 3 LSA, but the only
>platforms that support this are
>Release 12.0(15)S:
>Cisco 7200 series
>Cisco 7500 series
>Cisco 12000 series
>Support for the Cisco 10000 and 10700 was added in Cisco IOS Release
>12.0(17)ST.
>
>
>Nate
>
> > -----Original Message-----
> > From: Peter van Oene [mailto:pvo@usermail.com]
> > Sent: Thursday, October 17, 2002 11:04 AM
> > To: Nathan Chessin; ccielab@groupstudy.com
> > Subject: RE: Filtering OSPF LSA type 3
> >
> >
> > Sorry Nathan, I don't follow you. Can you elaborate?
> >
> >
> > At 10:16 AM 10/17/2002 -0700, you wrote:
> > >you can on certain platforms, but not for the lab.
> > >
> > >
> > >http://www.cisco.com/univercd/cc/td/doc/product/software/ios1
> > 20/120newft/120
> > >limit/120s/120s15/fiarospf.htm
> > >
> > >Nate
> > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> > [mailto:nobody@groupstudy.com]On Behalf Of
> > > > Peter van Oene
> > > > Sent: Wednesday, October 16, 2002 6:17 AM
> > > > To: Senthil Kumar
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: RE: Filtering OSPF LSA type 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/ios1
> > 22/122newft/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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