Enterasys Matrix 2G4072-52 Configuration Manual page 1127

13.2.2.18 ip split-horizon poison
Use this command to enable or disable split horizon poison-reverse mode for RIP packets. Split
horizon prevents packets from exiting through the same interface on which they were received.
Poison-reverse explicitly indicates that a network is unreachable, rather than implying it by not
including the network in routing updates.
ip split-horizon poison
Syntax Description
None.
Command Syntax of the "no" Form
The "no" form of this command disables split horizon poison reverse:
no ip split-horizon poison
Command Type
Router command.
Command Mode
Interface configuration: Matrix>Router1(config-if(Vlan 1))#
Command Defaults
None.
Example
This example shows how to disable split horizon poison reverse for RIP packets transmitted on
VLAN 1:
Matrix>Router1(config)#interface vlan 1
Matrix>Router1(config-if(Vlan 1))#no ip split-horizon poison
Matrix DFE-Platinum and Diamond Series Configuration Guide
Routing Protocol Configuration Command Set
Configuring RIP
13-25