Configuring ospfv3 area parameters, Configuration prerequisites, Configuring an ospfv3 stub area – H3C Technologies H3C S12500 Series Switches User Manual
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Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable an OSPFv3 process
and enter its view.
ospfv3 [ process-id ] [ vpn-instance
vpn-instance-name ]
By default, no OSPFv3 process is
enabled.
For more information about VPN
instances, see MPLS Configuration
Guide.
3.
Specify a router ID.
router-id router-id N/A
4.
Enter interface view.
interface interface-type
interface-number
N/A
5.
Enable an OSPFv3 process on
the interface.
ospfv3 process-id area area-id
[ instance instance-id ]
Disabled by default.
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; therefore, the backbone
and non-backbone areas, including the backbone itself, must be contiguous. In practice, necessary
physical links might not be available for such connectivity. You can configure virtual links to address the
problem.
Configuration prerequisites
Before you configure OSPFv3 area parameters, complete the following tasks:
•
Enable IPv6 packet forwarding.
•
Configure basic OSPFv3.
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-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: