Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 200)

172 Multi-Service IronWare Routing Configuration Guide
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Configuring OSPF
The default-information-originate metric metric-value parameter indicates the cost of the default
LSA that originated into the NSSA area. The range is from 1 to 16777215.
The default-information-originate metric-type type-value parameter indicates the default external
LSA type that originated into the NSSA area. The default type is type-2.
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.
The no-redistribution option prevents a NSSA Area Border Router (ABR) from generating external
(type-7) LSA into an NSSA area. By default redistribution is enabled in a NSSA.
NOTE
Use this option when an ASBR generates type-5 LSA into normal areas and does not generate type-7
LSA into NSSA area.
The translator-always option configures the translator-role.By default, translator-always option is
not set. The translator role by default is candidate.
The translator-interval stability-interval parameter configures the time interval for which an elected
NSSA translator continues to perform its duties even after its NSSA translator role has been
deposed by another router. By default, the stability-interval is 40 seconds and its range is from 10
to 60 seconds.
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
In version 03.2.01 of the Multi-Service IronWare software, a command was added to allow 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.
Brocade(config)# router ospf
Brocade(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 10.1.1.1, enter the following commands. This example
assumes that you have already configured NSSA 10.1.1.1.
Brocade(config)# router ospf
Brocade(config-ospf-router)# area 10.1.1.1 range 10.157.22.1 255.255.0.0
Brocade(config-ospf-router)# write memory