split-horizon enable

Function

The split-horizon enable command enables split horizon in a bridge domain (BD).

The undo split-horizon enable command disables split horizon in a bridge domain.

By default, split horizon is disabled in a bridge domain.

Format

split-horizon enable

undo split-horizon enable

Parameters

None

Views

Bridge domain view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bdbase	write

Usage Guidelines

Usage Scenario

A bridge domain is a broadcast domain, in which bridge domain members broadcast received packets within the domain. To reduce the broadcast volume, member interfaces that do not need to communicate can be isolated. To meet this requirement, run the split-horizon enable command to enable split horizon. Unknown Unicast, multicast, and broadcast traffic between AC interfaces in the BD is then isolated.

Prerequisites

A bridge domain has been created using the bridge-domain command.

Configuration Impact

The split-horizon enable command run in the BD view takes effect on all bridge domain member interfaces. If bridge domain member interfaces need to communicate, run the split-horizon command in a specific EVC Layer 2 sub-interface view.

Example

# Enable split horizon in bridge domain 10.

<HUAWEI> system-view
[~HUAWEI] bridge-domain 10
[*HUAWEI-bd10] split-horizon enable