H3C S7500E Series Command Manual page 349

Command Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches
3.1.37 nssa
Syntax
nssa [ default-route-advertise | no-import-route | no-summary ]*
undo nssa
View
OSPF area view
Parameters
default-route-advertise: Usable on an NSSA ABR or an ASBR only. If it is configured
on an NSSA ABR, the ABR generates a default route in a Type-7 LSA into the NSSA
regardless of whether the default route is available. If it is configured on an ASBR, only
a default route is available on the ASBR can it generates the default route in a Type-7
LSA into the attached area.
no-import-route: Usable only on an NSSA ABR that is also the ASBR of the OSPF
routing domain to disable redistributing routes in Type7 LSAs into the NSSA area,
making sure that routes can be redistributed correctly.
no-summary: Usable only on an NSSA ABR to advertise only a default route in a
Type-3 summary LSA into the NSSA area. In this way, all the other summary LSAs are
not advertised into the area. Such an area is known as an NSSA totally stub area.
Description
Use the nssa command to configure the current area as an NSSA area.
Use the undo nssa command to restore the default.
By default, no NSSA area is configured.
All routers attached to an NSSA area must be configured with the nssa command in
area view.
Related commands: default-cost.
Examples
# Configure Area 1 as an NSSA area.
<Sysname> system-view
[Sysname] ospf 100
[Sysname-ospf-100] area 1
[Sysname-ospf-100-area-0.0.0.1] nssa
Chapter 3 OSPF Configuration Commands
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