4-27command on Switch D to display its neighbors. Note that the original BDR (Switch C) becomes the DRand Switch B becomes BDR now.If all Ethernet Switches on the network are removed from and then added to the network again, SwitchB will be elected as the DR (with a priority of 200), and Switch A will be the BDR (with a priority of 100).Shutting down and restarting all the switches will bring about a new round of DR/BDR election on thenetwork.Configuring OSPF Virtual LinkNetwork requirementsDevices in the network run OSPF to realize interconnection. The network is split into three areas: onebackbone area and two non-backbone areas (Area 1 and Area 2). Area 2 has no direct connection tothe backbone, and it has to reach the backbone through Area 1. The customer hopes that Area 2 caninterconnect with other two areas.Based on the customer requirements and networking environment, use a virtual link to connect Area 2to the backbone area.Network diagramFigure 4-9 Network diagram for OSPF virtual link configurationDevice Interface IP interface Router IDSwitch A Vlan-int1 196.1.1.1/24 1.1.1.1Switch B Vlan-int1 196.1.1.2/24 2.2.2.2Vlan-int2 197.1.1.2/24Switch C Vlan-int1 152.1.1.1/24 3.3.3.3Vlan-int2 197.1.1.1/24Configuration procedure# Configure Switch A. system-view[SwitchA] interface Vlan-interface 1[SwitchA-Vlan-interface1] ip address 196.1.1.1 255.255.255.0[SwitchA-Vlan-interface1] quit
