JUNOSe 9.1.x Command Reference Guide A to M > A Commands > area nssa

area nssa

Description: 

Configures an area as an NSSA and controls generation of type 7 default LSAs. NSSAs are similar to stub areas but have the additional capability of importing AS external routes in a limited fashion. The no version removes the specified option for default-information-originate, removes default-information-originate, or removes the NSSA designation from the area.

Syntax: 

[ no ] area { areaId | areaIdInt } nssa [ default-information-originate [ always |
metric absoluteValue | metric-type 1 | metric-type 2 | route-map mapTag ]* ]
[ no-summary ]

• areaId—OSPF area ID in IP address format
• areaIdInt—OSPF area ID as a decimal value in the range 0–4294967295
• default-information-originate—Causes the generation of a type 7 default LSA if a default route exists in the routing table.
• always—Creates the default route if it does not exist
• absoluteValue—Metric applied to the generated type 7 default LSAs; ranges from 0–4294967295
• metric-type 1—Cost of the external routes is equal to the sum of all internal costs and the external cost
• metric-type 2—Cost of the external routes is equal to the external cost alone; this is the OSPF default
• mapTag—String of up to 32 alphanumeric characters that specifies a route map applied to the generated type 7 default LSAs
• *—Indicates that one or more parameters can be repeated multiple times in a list in the command line
• no-summary—Restricts T3 summary LSAs from flowing into the NSSA area (T7 external LSAs and T3 default route LSAs are still injected into the area)

Mode(s): 

Router Configuration

    Release Information    Command introduced before JUNOSe Release 7.1.0.
no-summary keyword added in JUNOSe Release 7.2.0.