![]() ![]() OSPF is a non-preemptive activity you must run the command “clear ip ospf process”.In DR/BDR election if priority is 0 then the router can’t be elected as DR or BDR and OSPF.If there are no loopback interfaces the highest IP address given to any active interface is selected as router ID. ![]() If Router ID is not manually configured, the highest IP address on any of the loopback interfaces is selected as Router ID.If the priority of the routers are same then, the router with the highest Router ID is selected as DR and the router with second-highest Router ID is selected as BDR.Router is highest OSPF priority will become DR and router with second-highest priority will become BDR.To send information to DR or BDR multicast IP of 224.0.0.6 is used DR sends routing information with multicast IP of 224.0.0.5. Each non-BDR or non-DR router in the network exchange routing information with DR or BDR. OSPF can elect one router as DR (Designated Router) and one router as BDR (Backup Designated Router).If DR fails BDR takes over. ![]()
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