F3215-HP Load Balancing Module Network Management Configuration Guide-6PW101

212
Ste
p
Command Remarks
5. Specify a cost for the default
route advertised to the stub
area.
default-cost cost
Optional.
The default cost is 1.
The default-cost command takes
effect only on the ABR of a stub
area or totally stub area.
NOTE:
V
irtual 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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter OSPF view.
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enter area view.
area area-id N/A
4. Configure the area as an
NSSA area.
nssa [ default-route-advertise |
no-import-route | no-summary |
translate-always |
translator-stability-interval value ]
*
Not configured by default.
5. Specify a cost for the default
route advertised to the
NSSA area.
default-cost cost
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.
NOTE:
V
irtual links cannot transit a stub area or totally stub areas.
Configuring a virtual link
Non-backbone areas exchange routing information via the backbone area. Connectivity between the
backbone and non-backbone areas and within the backbone must be available.
You can configure virtual links to ensure the connectivity when physical links are not enough. Virtual links
cannot transit a stub area or totally stub areas.