3Com 3031 Command Reference Manual page 584

584 C 6: R P
HAPTER OUTING
nssa
opaque-capability
ROTOCOL
[3Com] ospf 200 vpn-instance vpn1
[3Com-ospf-200] area 1
[3Com-ospf-200-area-0.0.0.1] network 131.108.20.0 0.0.0.255
Enable OSPF process 300 on the router and specify the number of the
area where the interface is located as 2.
[3Com] ospf 300 vpn-instance vpn1
[3Com-ospf-300] area 2
[3Com-ospf-300-area-0.0.0.2] network 131.108.20.0 0.0.0.255
Network already set in OSPF process 200
Syntax
nssa [ default-route-advertise ] [ no-import-route ] [ no-summary ]
undo nssa
View
OSPF area view
Parameter
default-route-advertise: Only available for the NSSA ABR or ASBR. When using
the parameter at NSSA ABR, you can generate Type-7 LSAs for the default
route no matter whether there exists the default route 0.0.0.0 in the routing
table. When using the parameter at NSSA ASBR, you can generate Type-7 LSAs
for the default route only if there exists the default route 0.0.0.0 in the routing
table.
no-import-route: Forbids AS external routes to be imported in to the NSSA as
Type-7 LSAs. This parameters is available for the NSSA ABR and for the ASBR in
OSPF AS, to ensure all external route information is imported into the OSPF
areas.
no-summary: Only available for the NSSA ABR. When the parameter is
selected, the NSSA ABR advertises a default route via the Summary-LSAs
(Type-3) in the area, but no other Summary-LSAs to other areas.
Description
Using the nssa command, you can configure an area as NSSA area. Using the
undo nssa command, you can cancel the function.
By default, NSSA area is not configured.
For all the routers in the NSSA area, the command nssa must be used to configure
the area as NSSA .
Example
Configure area 1 as NSSA.
[3Com-ospf-1] area 1
[3Com-ospf-1-area-0.0.0.1] network 10.110.0.0 0.255.255.255
[3Com-ospf-1-area-0.0.0.1] nssa
Syntax
opaque-capability enable
undo opaque-capability