You should look at the metrics for each of the routes, and lets say that the
128K link is for example 1000, the 512K link is 500, and the 1024K link is
250.  Variance defines a multiplier by which a metric may differ, or vary,
from the metric of the lowest cost route.  So if you specify the variance as
4:

4 * 250 (the lowest cost in my example above)= 1000

This means that any route having a metric up to and including 1000 will be
used in unequal cost load balancing (as long as certain other rules are
met).  Please don't credit me with the whole explanation, I got some of it
out of the Cisco Press book Routing TCP/IP Vol. 1 by Jeff Doyle.  Hope this
helps.

Guy


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 05, 2001 5:38 PM
To: [EMAIL PROTECTED]
Subject: Variance command? calculating variance????????? [7:7239]


How do I calculate Variance for IGRP?

router igrp 1
 variance ?

If I have a 512k link 128k link and a 1024k link how do I figure out the
variance to do unequal cost load balancing over all links?




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