Configuring Ospfv3 Area Parameters; Configuration Prerequisites; Configuring An Ospfv3 Stub Area; Configuring An Ospfv3 Nssa Area - HPE FlexNetwork HSR6800 Configuration Manual

Configuring OSPFv3 area parameters

The stub area, NSSA area, and virtual link features of OSPFv3 are the same as OSPFv2.
Splitting an OSPFv3 AS into multiple areas reduces the number of LSAs and extends OSPFv3
applications. For those non-backbone areas residing on the AS boundary, configure them as stub
areas to further reduce the size of routing tables and the number of LSAs.
Non-backbone areas exchange routing information through the backbone area. The backbone and
non-backbone areas (including the backbone itself) must be contiguous. In practice, necessary
physical links might not be available for this connectivity. You can configure virtual links to address
this issue.

Configuration prerequisites

Before you configure OSPFv3 area parameters, complete the following tasks:
•
Enable IPv6 packet forwarding.
•
Configure OSPFv3 basic functions.

Configuring an OSPFv3 stub area

Follow these guidelines when you configure an OSPFv3 stub area:
•
You cannot remove an OSPFv3 area directly. The area can be removed only when you remove
all configurations in area view and all interfaces attached to the area become down.
•
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-Router-LSA, or other Inter-Area-Prefix-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
Enter system view.
1.
Enter OSPFv3 view.
2.
Enter OSPFv3 area view.
3.
Configure the area as a stub
4.
area.
Specify a cost for the default
5.
route advertised to the stub
area.

Configuring an OSPFv3 NSSA area

Step
Enter system view.
1.
Enter OSPFv3 view.
2.
Command
system-view
ospfv3 [ process-id ]
area area-id
stub [ no-summary ]
default-cost value
Command
system-view
ospfv3 [ process-id ]
306
Remarks
N/A
N/A
N/A
By default, no area is configured
as a stub area.
Optional.
The cost for the default route
advertised to the stub area is 1.
Remarks
N/A
N/A