[c-nsp] BGP Route Nailing & Reoriginating

[Lawrence Wong]

Hi Joe,

Yeap, we have considered altering dampening parameters as well but if we view R3/AS3 as "The Internet", the parameters may not have much effect as different Rs along the line may have different tolerance to flapping.

Hence the idea to bypass this by nailing the routes down on R2 to overcome flapping problems caused by poor connectivity between R1 and R2.

----- Original Message ----
From: Joe Provo <jzp-cnsp at rsuc.gweep.net>
To: cisco-nsp at puck.nether.net
Sent: Wednesday, December 6, 2006 3:09:40 AM
Subject: Re: [c-nsp] BGP Route Nailing & Reoriginating


On Tue, Dec 05, 2006 at 05:54:05AM -0800, Lawrence Wong wrote:
> Dear gurus,
> 
> I have an environment as follows:
> 
>         (R1 / AS1) <-> (R2 / AS2) <-> (R3 / AS3)
[snip]
> The objective is to "hide" AS1 and also to prevent BGP dampening
> at R3 caused by flapping link between R1 & R2.

Re-evaluate your use of BGP in the topology.  If you have reasons
to use it and crux of the problem is dampening, re-examine your
dempening parameters.  Trivial case is to put your prefixes of
interest onto the dampening exemptions.  

Joe

-- 
             RSUC / GweepNet / Spunk / FnB / Usenix / SAGE
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