mac-withdraw propagate enable

Function

The mac-withdraw propagate enable command enables a PE to forward a received MAC Withdraw message to peers.

The undo mac-withdraw propagate enable command disables a PE from forwarding a received MAC Withdraw message to peers.

By default, a PE does not forward a received MAC Withdraw message.

Format

mac-withdraw propagate enable

undo mac-withdraw propagate enable

Parameters

None

Views

VSI view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On an LDP or BGP AD VPLS network, after a local PE receives a MAC Withdraw message, the local PE needs to forward the MAC Withdraw message to its peers. Otherwise, its peers cannot detect network topology changes or learn new MAC addresses in a timely manner. As a result, traffic loss caused by invalid MAC addresses will occur. The mac-withdraw propagate enable command enables a PE to forward a received MAC Withdraw message to peers.

Precautions

After you run the mac-withdraw propagate enable command on a PE, the PE forwards a received MAC Withdraw message to its peers according to the split horizon principle:

The MAC Withdraw message received from a UPE will be forwarded to NPEs and other UPEs.
The MAC Withdraw message received from an NPE will be forwarded to UPEs, but will not be forwarded to other NPEs.

Example

# Configure vsi100 on a PE to forward a received MAC Withdraw message to peers.

<HUAWEI> system-view
[HUAWEI] vsi vsi100
[HUAWEI-vsi-vsi100] mac-withdraw propagate enable