North American Network Operators Group
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Re: IGP metrics on WAN links
- From: Jennifer Rexford
- Date: Wed Jul 24 15:11:34 2002
> Just curious as to what people are using for metrics in their IGP
> and what their reasons are; bandwidth? geographical distance? latency?
We have a survey paper on techniques for setting IGP weights
http://www.research.att.com/~jrex/papers/ieeecomm02.ps
http://www.research.att.com/~jrex/papers/ieeecomm02.pdf
and a longer version
http://www.research.att.com/~jrex/papers/ieeecomm02.long.ps
http://www.research.att.com/~jrex/papers/ieeecomm02.long.pdf
that might be of interest. We discuss how to tune the IGP weights
in a systematic, automated fashion based on measurement data (of
topology and traffic) and an optimization algorithm, and show that
good weights settings allow IGPs like OSPF and IS-IS to perform almost
as well as optimal routing schemes that have complete flexibility in
selecting paths for the traffic.
-- Jen
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