Switch 7700 Command reference Guide, v2.0

OSPF Configuration Commands 149
Parameter
default-route-advertise Enter to import the default route to the NSSA area.
no-import-route Enter to block the import of the default route to the NSSA
area.
no-summary: ABR is disabled to transmit summary_net LSAs to the NSSA area.
Description
Using the nssa command, you can configure the type of an OSPF area as an NSSA
area. Using the
undo nssa command, you can cancel the function.
By default, NSSA area is not configured.
For all the routers connected to the NSSA area, the command nssa must be used
to configure the area as the NSSA attribute.
The default-route-advertise parameter is used to generate default type-7 LSA.
No matter whether there is route 0.0.0.0 in routing table on ABR, type-7 LSA
default route will be generated always. Only when there is route 0.0.0.0 in routing
table on ASBR, will type-7 LSA default route be generated.
On ASBR, the no-import-route parameter enables the external route imported by
OSPF through
import-route command not to be advertised to NSSA area.
Example
To configure area 1 as an NSSA area., enter the following:
[SW7700-ospf]area 1
[SW7700-ospf-area-0.0.0.1]network 36.0.0.0 0.255.255.255
[SW7700-ospf-area-0.0.0.1]nssa
ospf Syntax
ospf
undo ospf
View
System view
Parameter
None
Description
Using the ospf command, you can enable the OSPF protocol.
Using the undo ospf command, you can disable the OSPF protocol. By default, the
system does not run the OSPF protocol.
After enabling the OSPF protocol, you can configure OSPF operations using the
commands described in the “OSPF Configuration Commands” section.
Related command: network.