Alcatel-Lucent 7750 SR Manual page 1399

nssa
Syntax [no] nssa
Context config>service>vprn>ospf>area
config>service>vprn>ospf3>area
Description This command creates the context to configure an OSPF Not So Stubby Area (NSSA) and adds/
removes the NSSA designation from the area.
NSSAs are similar to stub areas in that no external routes are imported into the area from other OSPF
areas. The major difference between a stub area and an NSSA is an NSSA has the capability to flood
external routes that it learns throughout its area and via an ABR to the entire OSPF domain.
Existing virtual links of a non-stub or NSSA area will be removed when the designation is changed to
NSSA or stub.
An area can be designated as stub or NSSA but never both at the same time.
By default, an area is not configured as an NSSA area.
The no form of the command removes the NSSA designation and configuration context from the
area.
Default no nssa — The OSPF area is not an NSSA.
originate-default-route
Syntax originate-default-route [type-7]
no originate-default-route
Context config>service>vprn>ospf>area>nssa
config>service>vprn>ospf3>area>nssa
Description This command enables the generation of a default route and its LSA type (3 or 7) into a Not So
Stubby Area (NSSA) by an NSSA Area Border Router (ABR)
When configuring an NSSA with no summaries, the ABR will inject a type 3 LSA default route into
the NSSA area. Some older implementations expect a type 7 LSA default route.
The no form of the command disables origination of a default route.
Default
no originate-default-route — A default route is not originated.
Parameters type-7 — Specifies a type 7 LSA should be used for the default route.
Default
Type 3 LSA for the default route.
7750 SR OS Services Guide
Configure this parameter to inject a type-7 LSA default route instead the type 3 LSA into the
NSSA configured with no summaries.
To revert to a type 3 LSA, enter originate-default-route without the type-7 parameter.
Virtual Private Routed Network Services
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