Configuring Poison Reverse Parameters - Dell PowerConnect B-RX Configuration Manual

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Configuring RIPng
For example, to permit the inclusion of routes with the prefix 2001::/16 in RIPng routing updates
sent from Ethernet interface 3/1, enter the following commands.
BigIron RX(config)# ipv6 prefix-list routesfor2001 permit 2001::/16
BigIron RX(config)# ipv6 router rip
BigIron RX(config-ripng-router)# distribute-list prefix-list routesfor2001 out
ethernet 3/1
To deny prefix lengths greater than 64 bits in routes that have the prefix 3EE0:A99::/64 and allow
all other routes received on tunnel interface 3/1, enter the following commands.
BigIron RX(config)# ipv6 prefix-list 3ee0routes deny 3ee0:a99::/64 le 128
BigIron RX(config)# ipv6 prefix-list 3ee0routes permit ::/0 ge 0 le 128
BigIron RX(config)# ipv6 router rip
BigIron RX(config-ripng-router)# distribute-list prefix-list 3ee0routes in
tunnel 1
Syntax: [no] distribute-list prefix-list <name> in | out <interface> <port>
The <name> parameter indicates the name of the prefix list generated using the ipv6 prefix-list
command.
The in keyword indicates that the prefix list is applied to incoming routing updates on the specified
interface.
The out keyword indicates that the prefix list is applied to outgoing routing updates on the specified
interface.
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 distribution 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.
BigIron RX(config)# ipv6 router rip
BigIron RX(config-ripng-router)# poison-reverse
Syntax: [no] poison-reverse
To disable poison-reverse, use the no version of this command.
By default, if a RIPng interface goes down, the Brocade device does not send a triggered update for
the interface's 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.
BigIron RX(config)# ipv6 router rip
BigIron RX(config-ripng-router)# poison-local-routes
1114 BigIron RX Series Configuration Guide
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