The routers then flood OSPF LSAs using the DR as a central point of control. Any OSPF routers on the link elect a DR and BDR.OSPF dynamically discovers potential OSPF neighbors on the link.The routers do so because of the OSPF network type of “broadcast,” the default OSPF network type in Cisco IOS for Ethernet interfaces. 200-301 V2 Ch16: Controller-Based Networksīy default, OSPF routers elect a Designated Router (DR) and Backup Designated Router (BDR) on Ethernet links, whether LAN or WAN.200-301 V2 Part 4: Network Architectures.200-301 V2 Ch12: Miscellaneous IP Services.200-301 V2 Ch05: Securing Network Devices.200-301 V2 Ch04: Security Architectures.200-301 V1 Ch25: Configure IPv6 Routing.200-301 V1 Ch24: Configure IPv6 Addressing.200-301 V1 Ch18: Troubleshooting Routing.200-301 V1 Ch16: Router Addresses and Routes.200-301 V1 Ch14: Analyzing IPv4 Subnets.200-301 V1 Ch12: Classful IPv4 Networks.
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