Configuring An Nssa Area - H3C LS-3100-52P-OVS-H3 Operation Manual

To do...
Enter system view
Enter OSPF view
Enter area view
Configure the area as a stub
area
Specify a cost for the default
route advertised to the stub
area
It is required to use the stub command on routers attached to a stub area.
Using the default-cost command only takes effect on the ABR of a stub area.
The backbone area cannot be a (totally) stub area.
A (totally) stub area cannot have an ASBR because AS external routes cannot be distributed into
the stub area.
Virtual links cannot transit (totally) stub areas.

Configuring an NSSA Area

A stub area cannot redistribute routes. You can configure the area as an NSSA area to allow for route
redistribution while keeping other characteristics of a stub area.
Follow these steps to configure an NSSA area:
To do...
Enter system view
Enter OSPF view
Enter area view
Configure the area as an
NSSA area
Specify a cost for the default
route advertised to the NSSA
area
Use the command...
system-view
ospf [ process-id | router-id
router-id | vpn-instance
instance-name ] *
area area-id
stub [ no-summary ]
default-cost cost
Use the command...
system-view
ospf [ process-id | router-id router-id
| vpn-instance instance-name ] *
area area-id
nssa [ default-route-advertise |
no-import-route | no-summary ] *
default-cost cost
1-23
Remarks
—
—
—
Required
Not configured by default.
Optional
Defaults to 1.
Remarks
—
—
—
Required
Not configured by default.
Optional
Defaults to 1.