Changing the route loop prevention method

For more information about Poison reverse and Split horizon, see Changing the route loop prevention method.

Syntax:

[no] ip rip poison-reverse

Poison reverse is enabled by default. Disabling Poison reverse causes the routing switch to revert to Split horizon. (Poison reverse is an extension of Split horizon.) To disable Poison reverse on an interface, and thereby enable Split horizon, enter the following:

switch(config)# vlan 1
switch(vlan-1)# no ip rip poison-reverse

Entering the command without the no option re-enables Poison reverse.