Re: BGP Route Dampening

Garth,

This is correct. If you want R2 to dampen the route, shut the loopback down
on R1.

On Wed, Feb 17, 2010 at 8:53 PM, Garth Bryden <
hacked.the.planet.on.28.8k.dialup_at_gmail.com> wrote:

> Hi,
>
> I did a BGP Route Dampening LAB today and tested it out. I found it quiet
> amusing.
>
> I have three autonomous systems connected as per the arrows below.
>
> AS 100 (R1) -> (R2) AS 200 -> (R3) AS 300
>
> AS 100 had a loopback address of 1.1.1.1 advertised into BGP. All neighbors
> were up and running.
>
> I enabled route dampening using the "bgp dampening" command and left the
> default settings on AS200 and AS300 Routers.
>
> I noticed if on AS100 I did a "clear ip bgp *" over and over to cause a
> flapping link that the AS200 Routers R2 did not indicate that the
> 1.0.0.0/8network was flapping at all, only R3 in AS 300 would increase
> the penalty
> each time the route was withdrawn.
>
> It seemed that route dampening only worked if the route was removed with an
> update message to withdraw the route? Is this the correct behaviour I am
> experiencing.
>
> I'm using 3640's with IOS 12.4(10a)
>
> Cheers,
>
> Garth
>
>
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-- 
Bryan Bartik
CCIE #23707 (R&S, SP), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Blogs and organic groups at http://www.ccie.net