North American Network Operators Group
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Re: IGP metrics on WAN links

  • From: Warren Van Camp
  • Date: Fri Jul 19 16:23:41 2002 
At 12:27 PM 7/19/02 -0400, Tom Holbrook wrote:
>Just curious as to what people are using for metrics in their IGP and what their reasons are; bandwidth? geographical distance? latency? etc...

In the @Home backbone, we used actual fiber miles (plus a small offset per hop
to break ties when a particular route had multiple paths with differing numbers 
of routers).  This, of course, just created a "base" configuration which could be
tweaked somewhat depending on what needed to happen to make the best use
of circuits.

Warren Van Camp
(formerly @Home Network backbone engineering)