nanog mailing list archives

RE: BGP Traffic Engineering question


From: Drew Weaver <drew.weaver () thenap com>
Date: Tue, 10 Nov 2009 13:36:17 -0500

Sure, it still works however (for now).

-Drew

-----Original Message-----
From: jeffrey.lyon () gmail com [mailto:jeffrey.lyon () gmail com] On Behalf Of Jeffrey Lyon
Sent: Tuesday, November 10, 2009 1:34 PM
To: Drew Weaver
Cc: nanog () nanog org
Subject: Re: BGP Traffic Engineering question

Isn't Route Science EOL?

Jeff


On Tue, Nov 10, 2009 at 1:31 PM, Drew Weaver <drew.weaver () thenap com> wrote:
Howdy,

If you have several transit providers connected to your network and much of your traffic is generally directed by the 
"BGP tiebreaker" (i.e. lowest IP address) is there a way, without specifying on a per-prefix basis to prefer the "tie 
breaker winner" slightly less often? I don't want to "completely flip" the preference so that it just saturates a 
different link, I am just trying to see if there is any good way to influence the "natural" selection method.

We have 6 transit providers, and Level3 always wins because it is 4/8, normally this isn't a problem because we have 
traffic engineering systems (route science/avaya) which move traffic away from that link, but if we need to reboot 
the RS, or something catastrophic happens we would like it to spread out a little more evenly.

Anyone have any thoughts on this?

-Drew






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