mac-withdraw enable (VSI-LDP view)

Format

mac-withdraw enable

undo mac-withdraw enable

Parameters

None

Views

VSI-LDP view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2vpn	write

Usage Guidelines

Usage Scenario

On an LDP VPLS network, VSIs depend on MAC address entries to transmit traffic. If the AC or PW status changes, VSIs need to update the MAC entries immediately to reduce the traffic loss. The mac-withdraw enable command enables a PE to send a MAC Withdraw message to all its remote peers to inform them of the AC or PW status change (if any). After the peers receive the message, they remove the MAC address entries in their VSIs based on the message.

Configuration Impact

After the MAC withdraw function is enabled, the MAC addresses learned from the remote end may be deleted from the local end when the AC or PW turns Up or Down and broadcast may be triggered.

Example

# Configure the VSI named v100 to send MAC Withdraw messages to instruct all the remote peers to delete the learned MAC addresses when an AC fault or a UPE fault occurs and the VSI remains Up.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi v100
[*HUAWEI-vsi-v100] pwsignal ldp
[*HUAWEI-vsi-v100-ldp] vsi-id 100
[*HUAWEI-vsi-v100-ldp] mac-withdraw enable