Configuring a stub area
All the routers attached to a stub area must be configured with the stub command. The keyword no-summary is only available on the ABR of the stub area.
If you use the stub command with the keyword no-summary on an ABR, the ABR advertises a default route in an Inter-Area-Prefix LSA into the stub area. No AS External LSA, Inter-Area-Prefix LSA, or other Inter-Area-Router LSA is advertised in the area. The stub area of this kind is also known as a "totally stub area."
To configure an OSPFv3 stub 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 a stub area. | stub [ default-route-advertise-always | no-summary ] * | By default, no area is configured as a stub area. |
5. (Optional.) Specify a cost for the default route advertised to the stub area. | default-cost value | The default setting is 1. |