ip split-horizon — interface
ip split-horizon [
as-number] no ip split-horizon [
Split horizon for the interface
Varies with the interface type; usually enabled
When split horizon is enabled, any route learned from an interface is not advertised back out the same interface. This rule is intended to stop routing loops with distance-vector protocols. To enable split-horizon for EIGRP, specify the EIGRP
With most interfaces, split horizon is enabled. However, with multipoint interfaces—such as a multipoint Frame Relay interface—split horizon is disabled. See Chapter 8 for more information on split horizon.