mac-address learning disable

Function

The mac-address learning disable command disables MAC address learning.

The undo mac-address learning disable command restores MAC address learning.

By default, MAC address learning is enabled.

Format

mac-address learning disable

undo mac-address learning disable

Parameters

None

Views

Bridge domain view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mac	write

Usage Guidelines

Usage Scenario

If a network is stable, MAC address learning can be disabled on an interface or in a VLAN to save space of the MAC address table.

After MAC address learning is disabled on an interface or in a VLAN using the mac-address learning disable command, the device will not learn new MAC addresses from this interface, Bridge Domain (BD) or the interfaces in this VLAN.

After MAC address learning is enabled, a device can receive Ethernet frames from other devices, parse the source MAC address of each frame, locate the interface that receives each frame, and add new entries to the MAC address table. After that, when receiving an Ethernet frame destined for the MAC address contained in the MAC address table, the device can search the MAC address table to locate the corresponding outbound interface. This reduces broadcast traffic.

Example

# Disable MAC address learning in BD 10.

<HUAWEI> system-view
[~HUAWEI] bridge-domain 10
[*HUAWEI-bd10] mac-address learning disable