Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 201)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 183
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Configuring OSPF
NOTE
The Layer 3 Switch does not inject the default route into an NSSA by default.
NOTE
You can assign one area on a router interface. For example, if the system or chassis module has 16
ports, 16 areas are supported on the chassis or module.
To configure additional parameters for OSPF interfaces in the NSSA, use the ip ospf area…
command at the interface level of the CLI.
Configuring a summary address 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 a
summary address. The ABR creates an aggregate value based on the summary address. The
aggregate value becomes the address that the ABR advertises instead of advertising the individual
addresses represented by the aggregate.
To configure a summary address 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)#summary-address 192.168.22.1 255.255.0.0
Brocade(config-ospf-router)#write memory
Syntax: [no] summary-address ip-addr ip-mask
The 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 192.168
are summarized into a single route.
Assigning an area range (optional)
You can assign a range for an area, but it is not required. Ranges allow a specific IP address and
mask to represent a range of IP addresses within an area, so that only that reference range
address is advertised to the network, instead of all the addresses within that range. Each area can
have up to 32 range addresses.
Example
To define an area range for subnets on 192.168.5.1 and 192.168.6.2, enter the following
commands.
Brocade(config)#router ospf
Brocade(config-ospf-router)#area 192.168.5.1 range 192.168.0.0 255.255.0.0
Brocade(config-ospf-router)#area 192.168.6.2 range 192.168.0.0 255.255.0.0
Syntax: area num | ip-addr range ip-addr ip-mask
The num | ip-addr parameter specifies the area number, which can be in IP address format.
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.