Policy-based routing is evil? Discuss.

Fri Oct 11 18:33:14 UTC 2013

----- Original Message -----
> From: "joel jaeggli" <joelja at bogus.com>
> you take all the useful information that an IGP could be (or is)
> providing you, and then you ignore it and do something else.

Well, I tell you what. 

My perception of where this was a good idea is the use case a recent 
client might have for it:

Two consumer-grade uplinks (FiOS 150 and RR 100, specifically); primary
application is callcenter, VoIP to a service provider Elsewhere.

I would set it up so that all the VoIP and callcenter web traffic went over
FiOS *until it failed*, and everything else went Road Runner *unless it
failed*. 

This keeps the general traffic out of the hair of the latency/PPS sensitive
traffic whenever possible.

Is that not policy-based routing?

Why is it bad?

Cheers,
-- jra
-- 
Jay R. Ashworth                  Baylink                       jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates     http://baylink.pitas.com         2000 Land Rover DII
St Petersburg FL USA               #natog                      +1 727 647 1274