帧中继结合OSPF的配置拓扑图：实验步骤：RT-A：RT-A(config)#interface FastEthernet0/1RT-A(config-if)#ip address 192.168.0.1 255.255.255.0RT-A(config)#interface Serial0/0RT-A(config-if)#encapsulation frame-relay/对串口serial0/3/0进行frame-relay封装RT-A(config)#interface Serial0/0.1 point-to-point/进入串口的子接口配置模式RT-A(config-subif)# ip address 192.168.254.1 255.255.255.0RT-A(config-subif)# frame-relay interface-dlci 30/配置DLCIRT-A(config)#interface Serial0/0.2 point-to-pointRT-A(config-subif)# i
