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IP-EIGRP: Callback: callbackup_routes x.x.x.x

Our router is keep on getting "IP-EIGRP: Callback: callbackup_routes x.x.x.x" message for multiple addresses.

What is "IP-EIGRP: Callback:"? Can't find any info from CCO.

1 ACCEPTED SOLUTION

Accepted Solutions
Gold

Re: IP-EIGRP: Callback: callbackup_routes x.x.x.x

This means:

-- EIGRP attempted to install some route in the routing table at some point in the past.

-- Another routing protocol, perhaps a static route, or something else, installed a route with a better administrative distance, so the EIGRP route was rejected by the routing table.

At this point, the EIGRP route is marked as a "backup route," which means a possible route to replace the route currently in the routing table, if the current route is removed for some reason.

-- The current route in the routing table is removed, perhaps the removal of a static route, etc.

-- The routing table now calls to the EIGRP process, asking it to reinstall all the backup routes it has marked for this route.

At this point is where you will get this output on the console. I would assume you have debug ip routing events or debug ip eigrp on of some type, since these messages are not printed to the console without some form of debugging turned on.

There's nothing harmful in these messages, as you can see from the explaination above. You should be able to recreate getting them with just a couple of routers on demand, and see how they act more completely. You can also see the process in the EIGRP event log, if you want to look at that, with a couple of routers.

Russ.W

2 REPLIES

Re: IP-EIGRP: Callback: callbackup_routes x.x.x.x

The call back messages are from the routing table manager process, telling it to clear the route x.x.x.x from the topology table. I guess this message is not harmful in anyways.

Are you having multiple eigrp ASes on this router by any chance??

Gold

Re: IP-EIGRP: Callback: callbackup_routes x.x.x.x

This means:

-- EIGRP attempted to install some route in the routing table at some point in the past.

-- Another routing protocol, perhaps a static route, or something else, installed a route with a better administrative distance, so the EIGRP route was rejected by the routing table.

At this point, the EIGRP route is marked as a "backup route," which means a possible route to replace the route currently in the routing table, if the current route is removed for some reason.

-- The current route in the routing table is removed, perhaps the removal of a static route, etc.

-- The routing table now calls to the EIGRP process, asking it to reinstall all the backup routes it has marked for this route.

At this point is where you will get this output on the console. I would assume you have debug ip routing events or debug ip eigrp on of some type, since these messages are not printed to the console without some form of debugging turned on.

There's nothing harmful in these messages, as you can see from the explaination above. You should be able to recreate getting them with just a couple of routers on demand, and see how they act more completely. You can also see the process in the EIGRP event log, if you want to look at that, with a couple of routers.

Russ.W

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