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How to configure BGP with local preference attribute?

IBGP stands for Internal Border Gateway Protocol use local preference attribute to propagate the IBGP traffic to other autonomous systems. We use local preference attribute in IBGP, if there are multiple exit path are available from local autonomous system to destination.

The default value of local preference is 100 and the range is from 0 to 4294967295. If we change the local preference value of one router that change will propagate to all other routers in same autonomous system and the route with maximum local preference value will be considered as the best route.

We will configure here only local preference attribute in detail and the remaining attributes will be discussed in the next tips. Today tip will help you configure BGP between two different autonomous systems. In this case, we will try to configure four different routers with routing protocols RIP and then complete the all routing tables using EBGP and IBGP. At the end, we will change the local preference of one route in order to give it preference over a lower one.

This post was written by: Joshua Daniel

Joshua Daniel is a Management Professional,professional blogger, web designer and front end web developer. Follow him on Twitter