The Journey of a Network Engineer

Feb 20 2013   5:30AM GMT

How to configure On-Demand Routing in Cisco routers?

Sulaiman Syed Profile: Sulaiman Syed

On-Demand Routing (ODR) is one of the few simple routing methods. It is not a protocol by itself as it uses Cisco Discovery Protocol (CDP) to gather and propagate the route information.

ODR is designed for Hub-spoke networks, where the spokes are stub networks with nothing connecting them. As ODR is not a protocol to propagate routes to different routers.

ODR

Enabling ODR in the HUB router, the HUB router will install a default route into each Spoke router. This will eliminate the need for manual static route in each spoke router.  The Spoke routers will send the prefixes  to the HUB router. Prefixes insure that these routes are Variable Length Subnet Mask (VLSM). Furthermore, ODR routes can be redistributed into dynamic IP protocols.

For the above diagram. the required configuration would be

R2#conf t
R2(config)#router odr
R2(config)#router ospf 1
R2(config)#redistribute odr subnets

It really is straight forward. Hope this was informative.

 Comment on this Post

 
There was an error processing your information. Please try again later.
Thanks. We'll let you know when a new response is added.
Send me notifications when other members comment.

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to: