Command Reference Guide

3Com Router 5000 Family and Router 6000 Family rip split-horizon ● 275
Command Reference
rip split-horizon
Purpose Use the rip split-horizon command to configure an interface to use split
horizon when transmitting RIP packets.
Use the undo rip split-horizon command to configure an interface not to use
split horizon when transmitting RIP packets.
Syntax rip split-horizon
undo rip split-horizon
Parameters None
Default By default, an interface is enabled to use split horizon when transmitting RIP packets.
Example Specify the interface serial1/0/0 not to use split horizon when processing RIP packets.
[3Com ] interface serial1/0/0
[3Com -serial1/0/0] undo rip split-horizon
View This command can be used in the following views:
■ Interface view
Description Normally, split horizon is necessary for reducing routing loops. Only in some special
cases should split horizon be disabled to ensure the correct execution of protocols.
For example, on an NBMA network, you need to disable split horizon on
FR-encapsulated main interfaces and point-to-multipoint subinterfaces to allow an
interface to send the routes learned from those interfaces.