Configure an OSPFv3 Interface

Language:

In this example, OSPFv3 is enabled on the SEFOS1 switch, and 10.0.0.1 is specified as the router ID.

Enter Global Configuration mode.
```
SEFOS# configure terminal
```

Enable OSPFv3 globally in SEFOS1.
```
SEFOS(config)# ipv6 router ospf
```

Configure the OSPFv3 router ID.
```
SEFOS(config-router)# router-id 10.0.0.1
```
Note - The no form of this command is not supported. Therefore, you cannot remove the router ID, you can only change it to a different router ID IP.

Exit Router Configuration mode.
```
SEFOS(config-router)# end
```

Ensure that the router ID value is correct.

SEFOS# show ipv6 ospf
 
 Router Id: 10.0.0.1            ABR Type:  Standard ABR
 SPF schedule delay: 5 secs     Hold time between two SPFs: 10 secs
 Exit Overflow Interval: 0      Ref BW: 100000         Ext Lsdb Limit: -1
 Trace Value: 0x00000800        As Scope Lsa: 0        Checksum Sum: 0x0
 Demand Circuit: Enable         Passive Interface: Disable
 Nssa Asbr Default Route Translation: Disable
 Number of Areas in this router  1
            Area      0.0.0.0
    Number of interfaces in this area is  0
    Number of Area Scope Lsa: 0      Checksum Sum: 0x0
    Number of Indication Lsa: 0      SPF algorithm executed:  0 times

Enter Global Configuration mode in SEFOS1.
```
SEFOS# configure terminal
```

Enable the OSPFv3 interface on the VLAN interfaces.

This action defines the interfaces on which OSPFv3 runs and the area ID for those interfaces.

SEFOS(config)# interface vlan 11
SEFOS(config-if)# ipv6 ospf area 0.0.0.0
SEFOS(config-if)# exit
SEFOS(config)# interface vlan 10
SEFOS(config-if)# ipv6 ospf area 0.0.0.6
SEFOS(config-if)# end

Ensure that OSPFv3 is set to run the correct interfaces.

SEFOS# show ipv6 ospf interface
 
Interface Name: vlan11       Interface Id: 40    Area Id: 0.0.0.0
Local Address: fe80::214:4fff:fe6c:628f          Router Id: 10.0.0.1
Network Type: BROADCAST     Cost: 1              State: DR
Designated Router Id: 10.0.0.1      local address: fe80::214:4fff:fe6c:628f
Backup Designated Router Id: 0.0.0.0       local address: (null)
Transmit Delay: 1 sec        Priority: 1         IfOptions: 0x0
Timer intervals configured:
Hello: 10, Dead: 40, Retransmit: 5, Poll: 120
Demand Circuit: Disable            Neighbor Probing: Disable
Nbr Probe Retrans Limit: 10        Nbr Probe Interval: 120
Hello due in 8 sec
Neighbor Count is: 0
 
Interface Name: vlan10      Interface Id: 41    Area Id: 0.0.0.6
Local Address: fe80::214:4fff:fe6c:628f         Router Id: 10.0.0.1
Network Type: BROADCAST     Cost: 1             State: DR
Designated Router Id: 10.0.0.1      local address: fe80::214:4fff:fe6c:628f
Backup Designated Router Id: 0.0.0.0       local address: (null)
Transmit Delay: 1 sec        Priority: 1         IfOptions: 0x0
Timer intervals configured:
Hello: 10, Dead: 40, Retransmit: 5, Poll: 120
Demand Circuit: Disable            Neighbor Probing: Disable
Nbr Probe Retrans Limit: 10        Nbr Probe Interval: 120
Hello due in 9 sec
Neighbor Count is: 0