show ip ospf interface
Use this command to display interface information for OSPF.
Command Syntax
show ip ospf interface (IFNAME|)
Parameters
IFNAME
Interface name.
Command Mode
Privileged Exec mode and Exec mode
Applicability
This command was introduced before OcNOS version 1.3.
Example
#show ip ospf interface
eth1 is up, line protocol is up
Internet Address 10.100.10.72/24, Area 0.0.0.0, MTU 1500
Router ID 100.100.100.72, Network Type BROADCAST, Cost: 10, TE Metric 0
Transmit Delay is 1 sec, State DR, Priority 1
LDP-OSPF Sync configured
Holddown timer : 50 seconds, Remaining time = 30seconds
Designated Router (ID) 100.100.100.72, Interface Address 10.100.10.72
Backup Designated Router (ID) 10.100.12.57, Interface Address 10.100.10.105
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Neighbor Count is 1, Adjacent neighbor count is 1
Crypt Sequence Number is 0
Hello received 19 sent 106, DD received 4 sent 3
LS-Req received 1 sent 1, LS-Upd received 3 sent 3
LS-Ack received 2 sent 3, Discarded 0
OSPF Interface Fields
Table 1-17 explains the fields for each interface entry.
Table 1-17: OSPF interface output details
Field | Description |
|---|
Internet address | IP address and subnet mask of the interface. |
Area | OSPF area to which the interface belongs. |
MTU | Maximum Transmission Unit (MTU) of the interface. |
Transmit Delay | Transmit delay of the interface. |
Priority | OSPF priority of the interface used for election of Designated Router (DR) and Backup Designated Router (BDR). |
Hello | OSPF hello-interval. |
Dead | OSPF dead-interval. |
Wait | Hello wait-interval. |
Retransmit | The period, in seconds, for which the router waits between retransmissions of OSPF packets that have not been acknowledged. |
Hello due in | Time period for which router expects to receive hello packet. |
Neighbor Count | OSPF neighbor count. |
Adjacent neighbor | OSPF adjacent neighbor count. |
Crypt Sequence Number | Used for authentication. |
Hello received | Number of Hello packets and DD packets sent and received. |
LS-Req | Number of LSA requests and LSA updates sent and received. |
LS-Ack | Number of LSA acknowledgments sent and received number of LSA acknowledgment discards. |
Example: DoNotAge
The following is sample output of this command when DoNotAge is enabled:
#show ip ospf interface eth1
eth1 is up, line protocol is up
Internet Address 1.1.1.1/24, Area 0.0.0.0, MTU 1500
Process ID 0, Router ID 33.33.33.33, Network Type BROADCAST, Cost: 10
Transmit Delay is 1 sec, State Waiting, Priority 1, TE Metric 0
No designated router on this network
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:02
Neighbor Count is 0, Adjacent neighbor count is 0
Crypt Sequence Number is 1106347721
Hello received 0 sent 1, DD received 0 sent 0
LS-Req received 0 sent 0, LS-Upd received 0 sent 0
LS-Ack received 0 sent 0, Discarded 0
Reduce LSA flooding
Example: Hello Suppression
The following is sample output of this command when Hello-Suppression is enabled:
#sh ip os interface
p7p1 is up, line protocol is up
Internet Address 14.1.1.2/24, Area 0.0.0.0, MTU 1500
Process ID 1, VRF (default), Router ID 2.2.2.2, Network Type POINTOMULTIPOINT, Cost:
1
Reduce LSA flooding.
Transmit Delay is 1 sec, State Point-To-Point, TE Metric 1
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
Hello due in 00:00:03
Neighbor Count is 1, Adjacent neighbor count is 1
Suppress hello for 1 neighbor(s)
Hello received 5 sent 8, DD received 8 sent 6
LS-Req received 2 sent 2, LS-Upd received 8 sent 9
LS-Ack received 6 sent 6, Discarded 0
No authentication