R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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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 through 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, a totally stub area, an NSSA area, or a totally NSSA area.
MD5/HMAC-MD5 authentication supports key rollover. For more information, see "Configuring OSPF
a
uthentication"
To configure a virtual link:
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