Specifications

ip split-horizon poison Configuring RIP
Enterasys Matrix N Standalone (NSA) Series Configuration Guide 21-15
ip split-horizon poison
UsethiscommandtoenableordisablesplithorizonpoisonreversemodeforRIPpackets.
Syntax
ip split-horizon poison
no ip split-horizon poison
Parameters
None.
Defaults
None.
Mode
Routercommand,Interfaceconfiguration:Matrix>Router(configif(Vlan1))#
Usage
Splithorizonpreventspacketsfromexitingthroughthesameinterfaceonwhichtheywere
received.Poisonreverseexplicitlyindicatesthatanetworkisunreachable,ratherthanimplyingit
bynotincludingthenetworkinroutingupdates.
The“no”formofthiscommanddisablessplithorizonpoisonreverse.
Example
ThisexampleshowshowtodisablesplithorizonpoisonreverseforRIPpacketstransmittedon
VLAN1:
Matrix>Router(config)#interface vlan 1
Matrix>Router(config-if(Vlan 1))#no ip split-horizon poison
passive-interface
UsethiscommandtopreventRIPfromtransmitt ingupdatepacketsonaninterface.
Syntax
passive-interface vlan vlan-id
no passive-interface vlan vlan-id
Parameters
Defaults
None.
vlan
vlanid SpecifiesthenumberoftheVLANtomakeapassiveinterface.This
VLANmustbeconfiguredforIProutingasdescribedinPreRouting
ConfigurationTasksonpage 288.