Juniper JUNOSE 11.0, Command Reference Manual

Page: 172 / 1486

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
130 ■
area nssa
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