Configure On-Demand Routing (ODR) on Cisco Routers

Posted February 12, 2004 by Al Banks in Cisco router

Last Updated on

ODR is used to allow hub routers to accept prefix information distributed via Cisco Discovery Protocol (CDP) from spoke routers. This tutorial explains configuring ODR.

On the hub router, enter this command:router odr

Also, routes can be controlled with a distribute-list, assuming the referenced ACLs exist. Otherwise, no routes are accepted or sent.distribute-list 10 in
distribute-list 20 out

Since the prefix updates are carried on CDP, ODR updates can be controlled in true sledgehammer fashion by disabling CDP on an interface:interface serial 0/0
no cdp enable

For ODR to work properly, all dynamic routing protocols need to be disabled on the spoke routers.

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