From: Roger RPF (rpf@bluemail.ch)
Date: Tue Dec 02 2008 - 09:27:17 ARST
I'm quite sure that (the second option), as Tim sait,will permit all routes
originated in AS54 and nothing else. Since you have a permit statement in
the as path ACL.
I just labbed a similar filtering up, without using the route-map and it
just worked fine.
regards
Roger
-----Urspr|ngliche Nachricht-----
Von: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Im Auftrag von
Raheel Itrat
Gesendet: Dienstag, 2. Dezember 2008 12:07
An: Timothy Chin; GS CCIE-Lab
Betreff: Re: bgp filtering query
mmmm r u sure second cofig will permit all routes originating in autonomous
system 54, I dont think so ...i think it will also filter these routes
On Tue, Dec 2, 2008 at 3:21 PM, Timothy Chin <Tim@1c-solutions.com> wrote:
> The first config denies all routes originating in autonomous system 54
> and permits everything else.
>
> The second config permits them but denies everything else.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Raheel Itrat
> Sent: Tuesday, December 02, 2008 3:05 AM
> To: GS CCIE-Lab
> Subject: bgp filtering query
>
> Hi!
> Is there any difference in working between these two configs
>
> router bgp 100
> neighbor 20.1.1.254 route-map ABC out
> ip as-path access-list 1 permit _54$
> route-map ABC deny 10
> match as-path 1
> route-map ABC permit 20
>
> OR
> router bgp 100
> neighbor 20.1.1.254 filter-list 1 out
> ip as-path access-list 1 permit _54$
>
>
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