Creating an OSPF Area
Context
More and more devices are deployed with the expansion of the network scale. As a result, each device has to maintain a large LSDB, which becomes a heavy burden. OSPF solves this problem by dividing an AS into areas. An area is regarded as a logical device group. Each group is identified by an area ID. The borders of an area are devices, rather than links. A network segment (or a link) belongs to only one area; that is, each OSPF interface must be specified to an area.
Procedure
- Run system-view
The system view is displayed.
- Run ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *
An OSPF process is enabled, and the OSPF view is displayed.
- Run area area-id
An OSPF area is created and the area view is displayed.
Areas are not equally important. The area with ID 0 is called the backbone area. The backbone area is responsible for forwarding inter-area routing information. In addition, routing information between non-backbone areas must be forwarded through the backbone area.
- Run commit
The configuration is committed.