Name
ip split-horizon — interface
Synopsis
ip split-horizon [as-number] no ip split-horizon [as-number]
Configures
Split horizon for the interface
Default
Varies with the interface type; usually enabled
Description
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 as-number.
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.
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