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Cisco IOS in a Nutshell, 2nd Edition
book

Cisco IOS in a Nutshell, 2nd Edition

by James Boney
August 2005
Intermediate to advanced content levelIntermediate to advanced
798 pages
31h 12m
English
O'Reilly Media, Inc.
Content preview from Cisco IOS in a Nutshell, 2nd Edition

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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Publisher Resources

ISBN: 0596008694Errata