IP-EIGRP: Callback: callbackup_routes

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May 4th, 2007
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Hi


I have two routers with static routes configured which are then redistributed into eigrp on the second router the routes are weighted 200 as this is a backup route every so often traffic starts to take the backup link and i get the message below in the log:


P-EIGRP: Callback: callbackup_routes 172.36.0.0/16


*Apr 18 08:40:58.813: IP-EIGRP: Callback: callbackup_routes 172.32.0.0/15


*Apr 18 08:40:58.813: IP-EIGRP: Callback: callbackup_routes 172.34.0.0/16


*Apr 18 08:40:58.813: IP-EIGRP: Callback: callbackup_routes 172.20.0.0/16


Any ideas what is causing this?


cheers


Kev

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royalblues Fri, 05/04/2007 - 03:57
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Kev,


Do you see any logs for any flaps of the EIGRP neighbor relationship?


IP-EIGRP: Callback: callbackup_routes means at some point, EIGRP attempted to install routes to the destinations and failed, most commonly because of the existence of a route with a better administrative distance.

When this occurs, EIGRP registers its route as a backup route. When the better route disappears from the routing table, EIGRP is called back through callbackup_routes so that it can attempt to reinstall the routes that it is holding in the topology table.


HTH, rate if it does

Narayan

royalblues Fri, 05/04/2007 - 05:06
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Kevin,


Do you have the eigrp log-neighbor-changes commannd under EIGRP process?


Narayan

kevinhobson2000 Fri, 05/04/2007 - 05:18
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Narayan,


Ive just checked the config and whoever originally configured this has configured it not to.


Cheers


Kev

royalblues Fri, 05/04/2007 - 06:07
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Can you have this configured and then check the logs to see whether you see neighbor flaps along with the other logs


HTH, rate if it does

Narayan

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