Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 248)

230 Brocade ICX 6650 Layer 3 Routing Configuration Guide
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OSPF V3 configuration
Brocade(config-ospf6-router)#no ipv6 router ospf
ipv6 router ospf mode now disabled. All ospf config data will be lost when writing
to flash!
If you have disabled the protocol but have not yet saved the configuration to the startup-config file
and reloaded the software, you can restore the configuration information by re-entering the
command to enable the protocol (for example, ipv6 router ospf). If you have already saved the
configuration to the startup-config file and reloaded the software, the information is gone. If you
are testing an OSPF configuration and are likely to disable and re-enable the protocol, you might
want to make a backup copy of the startup-config file containing the protocol configuration
information. This way, if you remove the configuration information by saving the configuration after
disabling the protocol, you can restore the configuration by copying the backup copy of the
startup-config file onto the flash memory.
Assigning OSPF V3 areas
After OSPF V3 is enabled, you can assign OSPF V3 areas. You can assign an IPv4 address or a
number as the area ID for each area. The area ID is representative of all IPv6 addresses (subnets)
on a router interface. Each router interface can support one area.
An area can be normal or a stub:
• Normal – OSPF routers within a normal area can send and receive External Link State
Advertisements (LSAs).
• Stub – OSPF routers within a stub area cannot send or receive External LSAs. In addition, OSPF
routers in a stub area must use a default route to the area Area Border Router (ABR) or
Autonomous System Boundary Router (ASBR) to send traffic out of the area.
For example, to set up OSPF V3 areas 0.0.0.0, 192.168.10.0, 192.168.1.0, and 192.168.0.0,
enter the following commands.
Brocade(config-ospf6-router)#area 0.0.0.0
Brocade(config-ospf6-router)#area 192.168.10.0
Brocade(config-ospf6-router)#area 192.168.1.0
Brocade(config-ospf6-router)#area 192.168.0.0
Syntax: [no] area number | ipv4-address
The number | ipv4-address parameter specifies the area number, which can be a number or in
IPv4 address format. If you specify a number, the number can be from 0 – 18.
NOTE
You can assign one area on a router interface.
Assigning a totally stubby area
By default, the Brocade device sends summary LSAs (LSA type 3) into stub areas. You can further
reduce the number of LSAs sent into a stub area by configuring the Brocade device to stop
sending summary LSAs into the area. You can disable the summary LSAs when you are configuring
the stub area or later after you have configured the area.
This feature disables origination of summary LSAs into a stub area, but the Brocade device still
accepts summary LSAs from OSPF neighbors and floods them to other areas. The Brocade device
can form adjacencies with other routers regardless of whether summarization is enabled or
disabled for areas on each router.