Re: [nsp] REG: OSPF Route filtering.

From: Majdi S. Abbas (msa@samurai.sfo.dead-dog.com)
Date: Mon Mar 05 2001 - 14:18:32 EST


On Mon, Mar 05, 2001 at 12:21:41PM -0500, Dan Debertin wrote:
> This is actually something that has always puzzled me. Why is it not
> possible to apply route filters as one can with other routing protocols?
> Cisco explains here that it isn't possible, but doesn't go into a lot of
> detail:
>
> http://www.cisco.com/warp/public/104/9.html#Q9

        Link state protocols depend on every router in an area having an
identical copy of the database; once you start filtering prefixes, then
every router in an area does NOT have an identical copy of the database;
to ensure consistancy, anything you don't want to use should not be in
OSPF.

        --msa



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