For more information about Poison reverse and Split horizon, see Changing the route loop prevention method.
Syntax:
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:
HP Switch(config)# vlan 1 HP Switch(vlan-1)# no ip rip poison-reverseEntering the command without the
no
option re-enables Poison reverse.