DR and BDR rules
- Router is highest OSPF priority will become DR and router with second-highest priority will become BDR.
- 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.
Explain OSPF DR/BDR Election?
OSPF is a dynamic routing protocol. OSPF can elect one router as DR (Designated Router) and one router as BDR (Backup Designated Router).If DR fails BDR takes over. Each non-BDR or non-DR router in the network exchange routing information with DR or 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.
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