Troubleshooting OSPF Protocol: Interfaces
Troubleshooting tools for the Open Shortest Path First (OSPF) protocol include a specific show command option. With show ip ospf interface, you can get more detail about the specific interfaces being used for OSPF. At this point, the loopback interface is configured, the timer intervals are still set to default values, a DR and BDR are selected, and 192.168.10.1 is the only neighbor.
Router2>enable Password: Router2#show ip ospf interface Loopback0 is up, line protocol is up Internet Address 192.168.255.254/24, Area 0 Process ID 100, Router ID 192.168.5.1, Network Type LOOPBACK, Cost: 1 Loopback interface is treated as a stub Host FastEthernet0/0 is up, line protocol is up Internet Address 192.168.1.240/24, Area 0 Process ID 100, Router ID 192.168.5.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 192.168.5.1, Interface address 192.168.1.240 Backup Designated router (ID) 192.168.10.1, Interface address 192.168.1.1 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:07 Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 192.168.10.1 (Backup Designated Router) Suppress hello for 0 neighbor(s)