l2-multicast limit dynamic-trunk-bandwidth lose-mode (VSI view)

Function

The l2-multicast limit dynamic-trunk-bandwidth lose-mode command enables the device to delete some Layer 2 multicast information of Down Eth-Trunk member interfaces when the required bandwidth on Up Eth-Trunk member interfaces exceeds the upper limit.

The undo l2-multicast limit dynamic-trunk-bandwidth lose-mode command restores the default configuration.

By default, the device does not delete Layer 2 multicast information of Down Eth-Trunk member interfaces even when the required bandwidth on Up Eth-Trunk member interfaces exceeds the upper limit.

Format

l2-multicast limit dynamic-trunk-bandwidth lose-mode

undo l2-multicast limit dynamic-trunk-bandwidth lose-mode

Parameters

None

Views

VSI-AUTO view, VSI-BD view, VSI-DEFAULT view, VSI-STATIC view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2mc	write

Usage Guidelines

Usage Scenario

If a bandwidth limit is configured for each member interface of an Eth-Trunk interface using the l2-multicast limit per-trunk-member bandwidth command in the Eth-Trunk interface view, the total bandwidth limit increases each time a new interface is added to the Eth-Trunk interface. If a member interface fails, multicast traffic on this member interface will be balanced by other Up member interfaces. Such a traffic transfer may cause the required bandwidth to exceed the upper limit on some member interfaces. If such a problem occurs on an Up member interface, original multicast traffic on this member interface may be interrupted. To prevent this problem, run the l2-multicast limit dynamic-trunk-bandwidth lose-mode command to enable the device to delete some Layer 2 multicast information of Down Eth-Trunk member interfaces when the required bandwidth on Up Eth-Trunk member interfaces exceeds the upper limit.

Configuration Impact

After the l2-multicast limit dynamic-trunk-bandwidth lose-mode command is run, the device deletes some Layer 2 multicast information of Down Eth-Trunk member interfaces when the required bandwidth on Up Eth-Trunk member interfaces exceeds the upper limit.

If the l2-multicast limit dynamic-trunk-bandwidth lose-mode command is run more than once, the latest configuration overrides the previous one.

Precautions

The l2-multicast limit dynamic-trunk-bandwidth lose-mode command configuration takes effect only if the l2-multicast limit per-trunk-member bandwidth command is configured.

Example

# Enable the device to delete some Layer 2 multicast information of Down Eth-Trunk member interfaces in VSI vsi0 when the required bandwidth on Up Eth-Trunk member interfaces exceeds the upper limit.

<HUAWEI> system-view
[~HUAWEI] mpls
[*HUAWEI-mpls] quit
[*HUAWEI] mpls l2vpn
[*HUAWEI-l2vpn] quit
[*HUAWEI] vsi vsi0
[*HUAWEI-vsi-vsi0] pwsignal ldp
[*HUAWEI-vsi-vsi0-ldp] quit
[*HUAWEI-vsi-vsi0] l2-multicast limit dynamic-trunk-bandwidth lose-mode