Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 667)

Multi-Service IronWare Routing Configuration Guide 639
53-1003033-02
Configuring OSPFv3
The no-redistribution parameter prevents an NSSA ABR from generating external (type-7) LSA into
an NSSA area. This is used in the case where an ASBR should generate type-5 LSA into normal
areas and should not generate type-7 LSA into NSSA area. By default, redistribution is enabled in a
NSSA.
The translator-always parameter configures the translator-role. When configured on an ABR, this
causes the router to unconditionally assume the role of an NSSA translator. By default,
translator-always 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
disposed by another router. By default the stability-interval is 40 seconds and its range will be 10 to
60 seconds.
Disabling the router to perform translations for NSSA LSAs
The nssa-translator command allows you to disable the router from performing 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.
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
Syntax: [no] area num | ip-addr range ip-addr ip-mask [advertise | not-advertise]
The num | ip-addr parameter specifies 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.
The ip-mask parameter specifies the portions of the IP address that a route must contain to be
summarized in the summary route. In the example above, all networks that begin with 209.157 are
summarized into a single route.
The advertise | not-advertise parameter specifies whether you want the device to send type 3 LSAs
for the specified range in this area. The default is advertise.