Creating an OSPF Area
Context
Each device on an OSPF network must maintain a link-state database (LSDB). The size of this LSDB increases as more devices are deployed on the network, which can become a burden. OSPF solves this problem by dividing an AS into areas. An area is a logical device group identified by an area ID. The borders of an area are devices rather than links. Each OSPF interface must belong to an area, meaning that a link (or network segment) belongs to only one 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 created, and the OSPF view is displayed.
- Run area area-id
The OSPF area view is displayed.
The area with ID 0 is a backbone area, which is responsible for forwarding inter-area routing information. Routing information between non-backbone areas must be forwarded through the backbone area.
