Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 259)

Syntax: [no] area { num | ip-addr nssa cost [ no-summary ] | default-information-originate }
The num and ip-addr parameters specify the area number, which can be a number or in IP address
format. If you specify a number, the number can be from 0 - 2,147,483,647.
The nssa cost and default-information-originate parameters specify that this is a Not-So-Stubby-Area
(NSSA). The cost specifies an additional cost for using a route to or from this NSSA and can be from 1 -
16777215. There is no default. Normal areas do not use the cost parameter. Alternatively, you can use
the default-information-originate parameter causes the device to inject the default route into the
NSSA.
Specifying the no-summary option directs the router to not import type 3 summary LSAs into the NSSA
area. The default operation is to import summary LSAs into an NSSA area.
NOTE
The device does not inject the default route into an NSSA by default.
To configure additional parameters for OSPF interfaces in the NSSA, use the ip ospf area command at
the interface level of the CLI.
Disabling the router to perform translations for NSSA LSAs
The no nssa-translator command allows you to disable the router to perform translations for NSSA
LSAs. When this command is used, type 7 NSSA external LSAs are not translated into type 5 external
LSAs. This command is useful when the router is an area border router with many NSSA areas, and
does not need to export the NSSA external routes into the backbone.
The following command enables this feature.
device(config)# router ospf
device(config-ospf-router)# no nssa-translator
Syntax: [no] nssa-translator
Configuring an address range for the NSSA
If you want the ABR that connects the NSSA to other areas to summarize the routes in the NSSA
before translating them into Type-5 LSAs and flooding them into the other areas, configure an address
range. The ABR creates an aggregate value based on the address range. The aggregate value
becomes the address that the ABR advertises instead of advertising the individual addresses
represented by the aggregate. You can configure up to 32 ranges in an OSPF area.
To configure an address range in NSSA 1.1.1.1, enter the following commands. This example assumes
that you have already configured NSSA 1.1.1.1.
device(config)# router ospf
device(config-ospf-router)# area 1.1.1.1 range 209.157.22.1 255.255.0.0
device(config-ospf-router)# write memory
Syntax: [no] area { num | ip-addr range ip-addr ip-mask [ advertise | not-advertise ] }
The num and ip-addr parameters specify the area number, which can be in IP address format. If you
specify a number, the number can be from 0 - 2,147,483,647.
The range ip-addr parameter specifies the IP address portion of the range. The software compares the
address with the significant bits in the mask. All network addresses that match this comparison are
summarized in a single route advertised by the router.
OSPFv2
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