From: Luis Anzola (lanzola@desca.com)
Date: Mon Apr 21 2008 - 16:21:29 ART
Hi, when you use a prefix-list to filter out a prefix in a BGP neighbor relationship, you always must to do a hard reset, soft reset or Route refresh on the local router, because the routing information on the other peer is saved on the BGP table, and it need to be updated with the new policy. When you enter Clear ip Route * on the remote peer without a reset, you only clear the Global IP routing table and the router still have the prefix on the BGP Table.
Ing. Luis Anzola Av. Blandin, Centro San Ignacio, Torre Kepler, 1060 A,
Consultor de Ingenierma Piso 10, Oficina TE-P10-01, Urb. La Castellana, Caracas
Gerencia de Delivery Venezuela.
e-mail: lanzola@desca.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Nikhil Engineer
Sent: Lunes, 21 de Abril de 2008 06:00 a.m.
To: ccielab@groupstudy.com
Subject: Re: BGP sticky prefix
I dont think it should behave the way it is happening wid u. I'll configure
this in my lab and revert back.
Till then can You please post your config......
also, check "sh ip bgp neigh x.x.x.x received-routes" on destination router.
Cheers,
Nikhil E.
On 4/18/08, ccie girl <ccieangel@googlemail.com> wrote:
>
> Hi
>
> I have used 'neighbor x.x.x.x prefix-list LIST out' to filter out a prefix
> from one
> bgp neighbor to another.
>
> If I use 'clear ip route *' on the destination router, the 'filtered'
> route
> just pops back
> with all the same details. However, if I reset the bgp relationships the
> route disappears.
>
> My question is where is the route 'reappearing' from when I do the 'Clear
> ip
> route *' command?
>
> Thanks
>
>
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