DR – reduces the number of adjacencies required on a multi-access network, which in turn reduces the amongst of routing traffic and the size of the topological database.
BDR - A router that becomes the designated router if the designated router fails
DROther - The router with the highest priority becomes the designated router (DR). If the priorities are the same, then the router with the highest router ID becomes the DR. By default, priorities are set to 1. A router with a priority of 0 never becomes a DR or a backup designated router (BDR); it is always a DROTHER, meaning a router that is neither the DR or the BDR.
Showing posts with label router id. Show all posts
Showing posts with label router id. Show all posts
Saturday, September 5, 2009
How is a router id assigned ?
The router-id is chosen based on the highest IP address present on the router. If a loopback interface is present, the loopback IP will be used. If more than one loopback interface is present, the highest loopback IP will be used.
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