From: D.H. Williams (draythw@gmail.com)
Date: Tue Jul 04 2006 - 15:27:17 ART
Petr,
Thanks for the response, that helps clear a few things up. Just want to
make sure, but you are referencing the match interface or next-hop, in your
last statement, correct? Using the route-map with the distribute-list?
One other thing I am also curious about, the database-filter all command
under the interface is stopping teh ospf database from being sent to the
neighbor on that interface, but the neighbor relationship is still able to
form, correct (I don't have access to a rack at the moment, otherwise I
would try this out myself. I'm going to try it later on, just curious if
you know off-hand).
Thanks a ton for your feedback, very helpful!
On 7/4/06, Petr Lapukhov <petr@internetworkexpert.com> wrote:
>
> Forgot to mention,
>
> this feature is particularly useful in case where you have
> shared interface with multiple neighbors. In other cases
> you may stick with basic distribute-list functionality.
>
> HTH
>
> 2006/7/4, Petr Lapukhov <petr@internetworkexpert.com>:
>
> > Just a quick note here,
> >
> > you may also opt to use "distribute-list with route-map" at R3,
> > to filter inbound routes based on next-hop value (or output interface),
> > directly at "receiving" router.
> >
> > http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s24/routmap.htm
> >
> >
> > filtering with distance won't work here, since external routes all have
> > the same
> > advertising RID (route-source).
> >
> > Everything else should probably use "database-filter" or cost
> > manipulation in some
> > way (max-metric falls under that category too), to adjust
> > forward-metric.
> >
> > HTH
> >
> > --
> > Petr Lapukhov, CCIE #16379
> > petr@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
> > Toll Free: 877-224-8987
> > Outside US: 775-826-4344
> >
> > 2006/7/4, D.H. Williams <draythw@gmail.com>:
> >
> > > Hey fellows,
> > >
> > > All right, was tinkering with OSPF filtering last night, and got a few
> > > questions and what have not I wanted to ask, to see what everyone has
> > > to
> > > say. Consider the following situation:
> > >
> > > R5 with two point-to-point subinterfaces going to R1 and R2.
> > >
> > > R1 and R2 have hdlc connections up to R3.
> > >
> > > All of the above links are running OSPF; backend of R5 is running
> > > RIP;
> > > Mutual Redistribution on R5.
> > >
> > > Now, let's say I want the following scenerio, I want R3 to get to all
> > > the
> > > RIP routes (E2) via R1. I tried the distribute-list statement on R2
> > > using
> > > teh route-map, but this just affects the route table, not the ospf
> > > database,
> > > so r2 still advertise the E2 routes up to R3, even though they aren't
> > > in his
> > > routing table.
> > >
> > > My question, how can I affect R3 to where it prefers R1, including not
> > > seeing anything advertise from R2 in the routing table? I'd also like
> > > R2 to
> > > route through R3 to get to Rip routes. And i'm looking for a solution
> > > that
> > > doesn't use cost or bandwidth (too easy and obvious, you know).
> > >
> > > Thanks in advance!
> > > D
> > >
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
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> > >
> >
> >
> >
> >
> >
> >
>
>
>
> --
> Petr Lapukhov, CCIE #16379
> petr@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
> Toll Free: 877-224-8987
> Outside US: 775-826-4344
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