Configuration Guide User guide

1290 FastIron Configuration Guide
53-1002494-02
OSPF V3 configuration
The CLI displays a warning message such as the following.
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, 200.5.0.0, 192.5.1.0, and 195.5.0.0, enter the
following commands.
Brocade(config-ospf6-router)#area 0.0.0.0
Brocade(config-ospf6-router)#area 200.5.0.0
Brocade(config-ospf6-router)#area 192.5.1.0
Brocade(config-ospf6-router)#area 195.5.0.0
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.