Command
IP OSPF Dead-Interval
Use
Sets the OSPF dead interval for the interface.
Syntax
Router(config-if)#ip ospf dead-interval <seconds>
Example
In this example, the dead-interval is configured R1’s int fa0/0.
Here’s the ospf interface information before the changes.
R1(config-if)#do show ip ospf interface fa0/0 FastEthernet0/0 is up, line protocol is up Internet Address 10.1.1.1/24, Area 0 Process ID 1, Router ID 111.111.111.111, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 111.111.111.111, Interface address 10.1.1.1 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:06 Supports Link-local Signaling (LLS) Index 1/1, flood queue length 0 Next 0x0(0)/0x0(0) Last flood scan length is 0, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor(s)
Now the changes to the dead-interval are applied.
R1(config-if)#ip ospf dead-interval 5
Here’s the ospf interface information after the changed dead-interval.
R1(config-if)#do show ip ospf interface fa0/0 FastEthernet0/0 is up, line protocol is up Internet Address 10.1.1.1/24, Area 0 Process ID 1, Router ID 111.111.111.111, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 111.111.111.111, Interface address 10.1.1.1 Backup Designated router (ID) 2.2.2.2, Interface address 10.1.1.2 Timer intervals configured, Hello 10, Dead 5, Wait 5, Retransmit 5 oob-resync timeout 40 Hello due in 00:00:07 Supports Link-local Signaling (LLS) 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 2.2.2.2 (Backup Designated Router) Suppress hello for 0 neighbor(s)