SMC Networks SMC6724L3 manual Ip split-horizon, 239, Split-horizon

IP ROUTING COMMANDS

ip split-horizon

Use this command to enable split-horizon or poison-reverse (a variation) on an interface. Use the no form to disable split-horizon.

Syntax

ip split-horizon [poison-reverse]no ip split-horizon

poison-reverse- Enables poison-reverse on the current interface.

Command Mode

Interface Configuration (VLAN)

Default Setting

split-horizon

Command Usage

•Split horizon never propagates routes back to an interface from which they have been acquired.

•Poison reverse propagates routes back to an interface port from which they have been acquired, but sets the distance-vector metrics to infinity. (This provides faster convergence.)

Example

This example propagates routes back to the source using poison-reverse.

Console(config)#interface vlan 1

Console(config-if)#ip split-horizon poison-reverse

Console(config-if)#

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