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

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

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