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    area nssa

    Syntax

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

    Release Information

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

    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.

    Options

    • 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

    Router Configuration

     

    Related Documentation

     

    Published: 2014-08-14