Re: BGP Unsuppress map

Garth,

Good point.

There is actually no suppression behavior in BGP aggregation by default ,and
you have to use the summary-only keyword to simulate what you see in most of
IGPs. Now the question is what if I use this keyword and advertise only a
summary out but at the same time we need to advertise some of more specific
routes as well? in this case you can use an unsup map which works on a per
neighbor basis.

Level 1 example: Ensure R1 sends a summary as well as all the more specific
routes to R2.
Level 2 example : We have a BGP router with 3 peers. Ensure Peer1 receives
only a summary. Peer2 and 3 should receive all the more specific routes as
well as the summary.

Lab the up and you're there.

HTH

Kambiz Agahian

CCIE Instructor/Consultant
M.Eng Telecom, CCIE# 25341, CCSI# 33326, MCSE, MCSA

On Fri, Aug 20, 2010 at 2:49 AM, Garth Bryden <
hacked.the.planet.on.28.8k.dialup_at_gmail.com> wrote:

> Hello,
>
> I was previously under the impression that an un-suppress map was used to
> unsuppress routes suppressed by aggregates but now my view of this has
> changed, i was just wondering if I can get some clarification.
>
> I now believe an unsuppress map will unsuppress ANY routes that have been
> suppressed in any way, eg if you configure a route map to filter certain
> routes then a unsuppress map the filtered routes will be advertised again?
>
> Anyone else seen this behavior?
>
> Thanks,
>
> Garth
>
>
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Received on Fri Aug 20 2010 - 03:43:59 ART