Configuring an OSPF Multi-Instance on the Multi-Instance CE

The process ID of the OSPF multi-instance configured on the multi-VPN-instance CE must be the same as that configured on the PE.

Perform the following steps on the multi-instance CE.

Access the system view.
```
system-view
```
Configure an OSPF multi-instance.
```
ospf process-id [ router-id router-id ] vpn-instance vpn-instance-name
```
The OSPF process ID corresponds to that of the PE.
Access the OSPF area view.
```
area area-id
```
Advertise the IP address of the interface connected the PE.
```
network ip-address wildcard-mask
```
If the multi-instance CE does not learn the routes of a Site through the OSPF multi-instance of the process, the routes of the LAN need to be imported to the OSPF instances of the process.