Command Reference Guide

3Com Router 5000 Family and Router 6000 Family nssa ● 211
Command Reference
nssa
Purpose Use the nssa command to configure an area as NSSA area.
Use the undo nssa command to cancel the function.
Syntax nssa [ default-route-advertise ] [ no-import-route ] [ no-summary ]
undo nssa
Parameters default-route-advertise
Only available for the NSSA ABR or ASBR. When using
the parameter at NSSA ABR to 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 to 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 redistributed in to the
NSSA as Type-7 LSAs. This parameter is available for
the NSSA ABR and for the ASBR in OSPF AS, to ensure
all external route information is redistributed 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.
Default By default, NSSA area is not configured.
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
View This command can be used in the following views:
■ OSPF Area view
Description For all the routers in the NSSA area, the command nssa must be used to configure
the area as NSSA.