The area-id parameter species the area number, which can be a number or in IP address format. If you specify a number, the number
can be from 0 to 2,147,483,647.
The nssa stub-metric parameter congures an area as a not-so-stubby-area (NSSA). The stub-metric will be the metric used for
generating default LSA in a NSSA. The range of the value is 1 to 1048575. The default value is 10.
The default-information-originate parameter generates a default route into an NSSA. If no-summary option is enabled then a type-3
default LSA will be generated into NSSA else a type-7 LSA will be generated into NSSA. By default the default-information-origiante
parameter is not set.
The metric metric-value parameter species the cost of the default LSA originated into the NSSA area. The range is 1 to 1048575.
There is no default
The metric-type type-value parameter species the type of the default external LSA originated into the NSSA area. It can be either
type-1 or type-2. The default is type-1.
The no-summary parameter prevents an NSSA ABR from generating a type-3 summary into an NSSA. By default the summary LSA is
originated into NSSA.
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 congures the translator-role. When congured 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 congures 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.
Conguring 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 ooding them into the other areas, congure 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 congure up to 32 ranges in an OSPF area.
To congure an address range in NSSA 10.1.1.1, enter the following commands. This example assumes that you have already
congured NSSA 10.1.1.1.
device(config)# router ospf
device(config-ospf6-router)# area 10.1.1.1 range 2001:DB8::/32
device(config-ospf6-router)# write memory
Syntax: [no] area {num | ip-addr} {range ipv6-addr/ipv6-subnet-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 ipv6-addr parameter
species the IP address portion of the range. The software compares the address with the signicant
bits in the mask. All network addresses that match this comparison are summarized in a single route advertised by the router.
The ipv6-subnet-mask parameter species the portions of the IPv6 address that a route must contain to be summarized in the
summary route. In the example above, all networks that begin with 2001:DB8:: are summarized into a single route.
The advertise and not-advertise parameters specify whether you want the device to send type 3 LSAs for the specied range in this
area. The default is advertise.
Conguring OSPFv3
FastIron Ethernet Switch Layer 3 Routing
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