Cisco IOS OSPF Protocol

Network Topology

Router0 Configuration Commands

Router0>enable
Router0#configure terminal
Router0(config)#interface serial 0/0/0
Router0(config-if)#ip address 172.16.1.2 255.255.255.248
Router0(config-if)#no shutdown
Router0(config-if)#interface gigabitEthernet 0/0
Router0(config-if)#ip address 192.168.10.1 255.255.255.0
Router0(config-if)#no shutdown
Router0(config-if)#exit
Router0(config)#router ospf 1
Router0(config-router)#network 192.168.10.0 0.0.0.255 area 0
Router0(config-router)#network 172.16.1.0 0.0.0.7 area 0
Router0(config-router)#end

Router1 Configuration Commands

Router1>enable
Router1#configure terminal
Router1(config)#interface serial 0/0/0
Router1(config-if)#ip address 172.16.1.1 255.255.255.248
Router1(config-if)#no shutdown
Router1(config)#interface serial 0/0/1
Router1(config-if)#ip address 172.16.2.1 255.255.255.248
Router1(config-if)#no shutdown
Router1(config-if)#interface gigabitEthernet 0/0
Router1(config-if)#ip address 192.168.20.1 255.255.255.0
Router1(config-if)#no shutdown
Router1(config-if)#exit
Router1(config)#router ospf 1
Router1(config-router)#network 192.168.20.0 0.0.0.255 area 0
Router1(config-router)#network 172.16.1.0 0.0.0.7 area 0
Router1(config-router)#network 172.16.2.0 0.0.0.7 area 0
Router1(config-router)#end

Router2 Configuration Commands

Router2>enable
Router2#configure terminal
Router2(config)#interface serial 0/0/0
Router2(config-if)#ip address 172.16.2.2 255.255.255.248
Router2(config-if)#no shutdown
Router2(config-if)#interface gigabitEthernet 0/0
Router2(config-if)#ip address 192.168.30.1 255.255.255.0
Router2(config-if)#no shutdown
Router2(config-if)#exit
Router2(config)#router ospf 1
Router2(config-router)#network 192.168.30.0 0.0.0.255 area 0
Router2(config-router)#network 172.16.2.0 0.0.0.7 area 0
Router2(config-router)#end