mac-keep disable

Function

The mac-keep disable command disables MAC address maintenance.

The undo mac-keep disable command restores the default setting.

By default, the function of keeping MAC is enabled.

Format

mac-keep disable

undo mac-keep disable

Parameters

None

Views

BD EVPN view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

When a device withdraws MAC routes, the MAC maintenance function is enabled by default. That is, the device does not process the received MAC route withdrawal message and retains the original MAC route for a period of time. This function is used to prevent MAC route flapping in a fault recovery switchback scenario. In the following scenarios, you need to run this command on a remote PE to disable MAC address maintenance:

Traditional VPLS and EVPN VPLS
Dual-homing to EVPN through Eth-Trunk interfaces (LACP deployed)
When a CE is dual-homed to PEs, there is no upstream traffic from the CE to the PEs.
In the preceding scenario, when services are switched back after the fault is rectified, the device on the backup path clears MAC addresses. In this case, the remote PE maintains MAC addresses by default. As a result, traffic is still diverted to the device on the backup path, causing traffic loss.

Example

# Disable MAC address maintenance.

<HUAWEI> system-view
[~HUAWEI] evpn vpn-instance evrf1 bd-mode
[~HUAWEI-evpn-instance-evrf1] mac-keep disable