nanog mailing list archives

Re: BGP AS Sets in the wild


From: Iljitsch van Beijnum <iljitsch () muada com>
Date: Tue, 23 Aug 2005 12:55:33 +0200


On 23-aug-2005, at 12:36, Abhishek Verma wrote:

I was looking at route-views.routeviews.org for the BGP routes and i
dont see any AS-Sets whatsoever. Are BGP routes with AS-SETs not
generally leaked into the wild?

Is this the case?

I guess they aren't.

I am under the impression that AS_SETs are generated whenever there
are some routes that are aggregated.

Yes, but aggregation in the BGP protocol is a relic from the BGP3-to- BGP4 transition, AFAIK it's rarely used these days.


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