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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 3 OSPF Configuration Commands
3-36
Example
# Specify the interfaces whose master IP addresses are in the segment range of
10.110.36.0 to run OSPF and specify the number of the OSPF area (where these
interfaces reside) as 6.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] ospf 1
[3Com-ospf-1] area 6
[3Com-ospf-1-area-0.0.0.6] network 10.110.36.0 0.0.0.255
3.1.29 nssa
Syntax
nssa [ default-route-advertise | no-import-route | no-summary ]*
undo nssa
View
OSPF Area view
Parameter
default-route-advertise: Imports the default route to the NSSA area.
no-import-route: Specifies not to import route to the NSSA area.
no-summary: An ABR is disabled from transmitting summary_net LSAs to the NSSA
area.
Description
Use the nssa command to configure an OSPF area as an NSSA area.
Use the undo nssa command to cancel the function.
By default, no NSSA area is configured.
For all the routers connected to the NSSA area, the nssa command must be used to
configure the area as the NSSA attribute.
The default-route-advertise argument is used to generate the default type-7 LSA.
No matter whether the route 0.0.0.0 exists in the routing table on the ABR, the type-7
LSA default route will always be generated. The type-7 LSA default route is generated
only when the route 0.0.0.0 exists in the routing table on the ASBR.
On the ASBR, if the no-import-route argument is provided, the external route
imported by OSPF with the import-route command will not be advertised to NSSA
area.