EIGRP variance

From: Danny.Andaluz@triaton-na.com
Date: Mon Sep 29 2003 - 17:42:51 GMT-3


Hello, Group. I am trying to get the variance command to work with EIGRP
and I think I'm doing it correctly, but it does not work the way I'd think
it would. Here's my topology:
 
      |--R6------R9--|
R4--| |---BB2
      |-R7-------R8--|
 
 
There is a loopback off of BB2 that is being learned by R4 from both R6 and
R7. Under a normal config, R4's traffic is load balanced between R6 and R7.
To test variance, I added an offset list to R7 outbound on the F0 doubling
the metric of what R4 sees from R6 and R7. Without Variance configured on
4, I saw that R4 preferred to get to the loopback via R6 and this is fine.
When I added "variance 2" under EIGRP on R4, I expected to see both routes
in the routing table and R4's traffic load balancing this traffic. This did
not happen. Instead, only the path through 6 remained. Here's the really
weird part. When I lowered the offset on R7 to 2000 instead of double, it
worked the way it's supposed to. As I understand it this should work the
way I first tried it, but it's not. Am I missing something?
 
Thanks,
Danny

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