Configuration Guide User guide

FastIron Configuration Guide 1221
53-1002494-02
Configuring poison reverse parameters
For the <interface> parameter, you can specify the ethernet, loopback, ve, or tunnel keywords. If
you specify an Ethernet interface, also specify the port number associated with the interface. If you
specify a VE or tunnel interface, also specify the VE or tunnel number.
To remove the prefix list, use the no form of this command.
Configuring poison reverse parameters
By default, poison reverse is disabled on a RIPng router. If poison reverse is enabled, RIPng
advertises routes it learns from a particular interface over that same interface with a metric of 16,
which means that the route is unreachable.
If poison reverse is enabled on the RIPng router, it takes precedence over split horizon (if it is also
enabled).
To enable poison reverse on the RIPng router, enter the following commands.
Brocade(config)# ipv6 router rip
Brocade(config-ripng-router)# poison-reverse
Syntax: [no] poison-reverse
To disable poison reverse, use the no form of this command.
By default, if a RIPng interface goes down, the Brocade device does not send a triggered update for
the interface IPv6 networks.
To better handle this situation, you can configure a RIPng router to send a triggered update
containing the local routes of the disabled interface with an unreachable metric of 16 to the other
RIPng routers in the routing domain. You can enable the sending of a triggered update by entering
the following commands.
Brocade(config)# ipv6 router rip
Brocade(config-ripng-router)# poison-local-routes
Syntax: [no] poison-local-routes
To disable the sending of a triggered update, use the no form of this command.
Clearing RIPng routes from the IPv6 route table
To clear all RIPng routes from the RIPng route table and the IPv6 main route table and reset the
routes, enter the following command at the Privileged EXEC level or any of the CONFIG levels of the
CLI.
Brocade# clear ipv6 rip routes
Syntax: clear ipv6 rip routes