ip address 193.1.1.1 255.255.255.0

!        

interface Serial0

ip address 192.1.1.2 255.255.255.0

clockrate 64000

!        

router ospf 1                                                    //在RB上启动OSPF

network 0.0.0.0 255.255.255.255 area 0  //宣告所有与RB相连的网络

!