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To configure an NSSA area, configure the nssa command on all the routers attached to the area.
To configure a totally NSSA area, 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
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter OSPFv3 view.
ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enter OSPFv3 area view.
area area-id
N/A
4. Configure the area as an
NSSA area.
nssa [ default-route-advertise
[ cost cost | nssa-only |
route-policy route-policy-name |
tag tag | type type ] * |
no-import-route | no-summary |
[ translate-always |
translate-never ] | suppress-fa |
translator-stability-interval value ]
*
By default, no area is configured as
an NSSA area.
5. (Optional.) Set a cost for the
default route advertised to
the NSSA area.
default-cost cost
The default setting is 1.
This command takes effect only on
the ABR/ASBR of an NSSA or totally
NSSA area.
Configuring an OSPFv3 virtual link
You can configure a virtual link to maintain connectivity between a non-backbone area and the
backbone, or in the backbone itself.
IMPORTANT:
• Both ends of a virtual link are ABRs that must be configured with the vlink-peer command.
• Do not configure virtual links in the areas of a GR-capable process.
To configure a virtual link:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter OSPFv3 view.
ospfv3 [ process-id | vpn-instance
vpn-instance-name ] *
N/A
3. Enter OSPFv3 area view.
area area-id N/A
4. Configure a virtual link.
vlink-peer router-id [ dead seconds |
hello seconds | instance instance-id |
ipsec-profile profile-name | retransmit
seconds | trans-delay seconds ] *
By default, no virtual link is
configured.
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