![]() ![]() If the DR goes off-line, the BDR automatically becomes the DR, and the router with the next highest priority then becomes the new BDR. ![]() In an OSPF network with no DR and no BDR, the neighboring router with the highest priority is elected the DR, and the router with the next highest priority is elected the BDR. If the area includes multiple networks, each network elects its own DR and BDR. This minimizes the amount of repetitive information that is forwarded on the network by eliminating the need for each individual router in the area to forward its routing information to all other routers in the network. All other routers in the area forward their routing information to the DR and BDR, and the DR forwards this information to all of the routers in the network. In an OSPF network having two or more routers, one router is elected to serve as the DR and another router to act as the BDR. ![]()
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