Distance OSPF Command on CISCO Router/Switch

Command

Distance OSPF

Use

This command changes the administrative distance for OSPF routes.

Syntax

Router(config-router)#distance ospf <intra-area distance><inter-area distance><external distance>

Example

Distance OSPF Command on CISCO Router/Switch 1

In this example, we will change OSPF administrative distance to 150 for internal routes and 220 for external. Currently, we see OSPF is at its default administrative distance of 110.

R1(config-router)#do show ip route ospf
33.0.0.0/32 is subnetted, 1 subnets
O 33.33.33.33 [110/65] via 192.168.13.2, 00:01:05, Serial1/1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/65] via 192.168.13.2, 00:01:05, Serial1/1
10.0.0.0/24 is subnetted, 3 subnets
O 10.2.2.0 [110/65] via 192.168.13.2, 00:01:05, Serial1/1
133.133.0.0/32 is subnetted, 1 subnets
O 133.133.133.133 [110/65] via 192.168.13.2, 00:01:05, Serial1/1

Here, we change the distance with the distance ospf command.

R1(config)#router ospf 1
R1(config-router)#distance ospf intra-area 150 inter
R1(config-router)#distance ospf intra-area 150 inter-area 150 ex
R1(config-router)#distance ospf intra-area 150 inter-area 150 external 220
R1(config-router)#exit

Now, we can see the change is reflected in the routing table.

R1(config)#do show ip route ospf
33.0.0.0/32 is subnetted, 1 subnets
O 33.33.33.33 [150/65] via 192.168.13.2, 00:00:06, Serial1/1
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [150/65] via 192.168.13.2, 00:00:06, Serial1/1
10.0.0.0/24 is subnetted, 3 subnets
O 10.2.2.0 [150/65] via 192.168.13.2, 00:00:06, Serial1/1
133.133.0.0/32 is subnetted, 1 subnets
O 133.133.133.133 [150/65] via 192.168.13.2, 00:00:06, Serial1/1