Configuring an NSSA area
To configure an NSSA area, configure the nssa command on all the routers attached to the area.
To configure a totally NSSA area, configure the nssa no-summary command on the ABR. The ABR of a totally NSSA area does not advertise inter-area routes into the area.
To configure an NSSA area:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter OSPFv3 view. | ospfv3 [ process-id | vpn-instance vpn-instance-name ] * | N/A |
3. Enter OSPFv3 area view. | area area-id | N/A |
4. Configure the area as an NSSA area. | nssa [ default-route-advertise [ cost cost-value | nssa-only | route-policy route-policy-name | tag tag | type type ] * | no-import-route | no-summary | [ translate-always | translate-never ] | suppress-fa | translator-stability-interval value ] * | By default, no area is configured as an NSSA area. |
5. (Optional.) Set a cost for the default route advertised to the NSSA area. | default-cost cost-value | The default setting is 1. This command takes effect only on the ABR/ASBR of an NSSA or totally NSSA area. |