Configuring An Nssa Area - HPE FlexNetwork HSR6800 Configuration Manual

Step
Enter system view.
1.
Enter OSPF view.
2.
Enter area view.
3.
Configure the area as a
4.
stub area.
Specify a cost for the
5.
default route advertised to
the stub area.
NOTE:
Virtual links cannot transit a stub area or totally stub area.

Configuring an NSSA area

A stub area cannot import external routes, but an NSSA area can import external routes into the
OSPF routing domain while keeping other stub area characteristics.
To configure an NSSA area, issue the nssa command on all the routers attached to the area. To
configure a totally NSSA area, you also need to 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
Enter system view.
1.
Enter OSPF view.
2.
Enter area view.
3.
Configure the area as an
4.
NSSA area.
Specify a cost for the
5.
default route advertised to
the NSSA area.
Command
system-view
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
area area-id
stub
[ default-route-advertise-always |
no-summary ] *
default-cost cost
Command
system-view
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
area area-id
nssa [ default-route-advertise |
no-import-route | no-summary |
translate-always |
translator-stability-interval
value ] *
default-cost cost
65
Remarks
N/A
N/A
N/A
Not configured by default.
You cannot configure the
backbone area as a stub or totally
stub area.
A stub or totally stub area cannot
have an ASBR because external
routes cannot be distributed into
the area.
Optional.
The default cost is 1.
The default-cost command takes
effect only on the ABR of a stub
area or totally stub area.
Remarks
N/A
N/A
N/A
Not configured by default.
Optional.
The default cost is 1.
The default-cost command takes
effect only on the ABR/ASBR of an
NSSA area and a totally NSSA
area.