show running-config Building configuration... Current configuration : 1036 bytes ! version 12.1 no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname R4 ! logging buffered 4096 debugging ! ! ! ! ! ip subnet-zero ! ! ! ! interface Loopback0 ip address 4.4.4.4 255.255.255.255 ! interface FastEthernet0/0 ip address 192.168.1.2 255.255.255.248 ip ospf priority 0 duplex auto speed auto ! interface Serial0/0 no ip address shutdown no fair-queue ! interface FastEthernet0/1 ip address 40.1.1.2 255.255.255.252 shutdown duplex auto speed auto ! interface Serial0/1 no ip address shutdown ! interface FastEthernet1/0 ip address 50.1.1.1 255.255.255.0 shutdown duplex auto speed auto ! router ospf 1 router-id 44.44.44.44 log-adjacency-changes area 4 virtual-link 11.11.11.11 network 4.4.4.4 0.0.0.0 area 4 network 192.168.1.0 0.0.0.7 area 14 ! ip classless ip http server ! logging history size 500 logging trap debugging ! line con 0 exec-timeout 0 0 logging synchronous line aux 0 line vty 0 4 login ! end R4#