In multi access networks DR/BDR elections happens at the end of the 2-way state. Router with the highest priority will be elected as DR and second highest will be elected as BDR. Default Priority is 1. If priority is tie, Router ID is the tie breaker. RID is highest IP address configured on a Physical interface, if loop back is configure, loop back interface IP selected as RID. If a router priority is configured as 0, then the router will not participate in DR and BDR elections. In this scenario routers will be stuck in 2-way state. And 2-way state is the normal state between two neighbors. We can configure the Router Priority by using ip ospf priority <value> form interface configuration mode.
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