[56693] in North American Network Operators' Group
Re: Route Supression Problem
daemon@ATHENA.MIT.EDU (Iljitsch van Beijnum)
Wed Mar 12 12:57:24 2003
Date: Wed, 12 Mar 2003 18:54:51 +0100 (CET)
From: Iljitsch van Beijnum <iljitsch@muada.com>
To: "Peter E. Fry" <pfry@swbell.net>
Cc: <nanog@merit.edu>
In-Reply-To: <3E6F6155.ECD0ECDF@swbell.net>
Errors-To: owner-nanog-outgoing@merit.edu
On Wed, 12 Mar 2003, Peter E. Fry wrote:
> > You are right, it is depressing. However, I don't see how the penalty
> > multiplication could happen here, you need a few hops in between for
> > that.
> Ah, but this is the Internet. Jack's two upstreams likely have direct
> or indirect links between them where they will also receive the route
> updates in question.
Dampening is done on the eBGP router where the route enters the AS, and,
unless I'm mistaken, per route/path and not per prefix. So the flapping
that ISP A sees from ISP B is a completely seperate thing from the
flapping that ISP A sees from its customer's customer as far as the
dampening algorithm is concerned.
> Should we change the subject (back) to "BGP to doom us all"?
For all the criticism that BGP is subjected to, I find it curious that
nobody has proposed a replacement protocol (that I'm aware of).
