Configuring a stub area

Enter the configure terminal command to access global configuration mode.
```
device# configure terminal
```
Enter the ip router-id command to specify the router ID.
```
device(config) ip router-id 10.4.4.4
```
Enter the ipv6 router ospf command to enter OSPFv3 router configuration mode and enable OSPFv3 on the device.
```
device(config)# ipv6 router ospf
```
Enter the area stub command and specify a metric value.
```
device(config-ipv6-router-ospf-vrf-default-vrf)# area 4 stub 100
```
Area 4 is defined as a stub area with an additional cost of 100.

The following example sets an additional cost of 100 on a stub area defined as 4.

device# configure terminal
device(config)# ip router-id 10.4.4.4 
device(config)# ipv6 router ospf 
device(config-ipv6-router-ospf-vrf-default-vrf)# area 4 stub 100