lacp priority (Interface view)

Function

The lacp priority command sets a Link Aggregation Control Protocol (LACP) interface priority.

The undo lacp priority command restores the default LACP interface priority.

The default LACP priority is 32768.

Format

lacp priority priority

undo lacp priority

Parameters

Parameter	Description	Value
priority priority	Specifies an LACP priority.	The value is an integer ranging from 0 to 65535. The smaller the priority value, the higher the priority.

Parameter

Description

Value

priority priority

Specifies an LACP priority.

The value is an integer ranging from 0 to 65535. The smaller the priority value, the higher the priority.

Views

100GE interface view, 10GE interface view, 25GE interface view, 400GE interface view, 40GE interface view, 50GE interface view, FlexE interface view, Layer 2 GE interface view, GE optical interface view, GE interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
trunk	write

Usage Guidelines

Usage Scenario

LACP interface priorities are set to prioritize interfaces of the same device. Interfaces with higher priorities are selected as active interfaces.

Two devices are connected through three interfaces on each side. After the three interfaces are bundled into an Eth-Trunk interface, the mode lacp-static command is used to configure the Eth-Trunk interface to work in static LACP mode. Two Eth-Trunk member interfaces are active. If you want to use an inactive interface to replace one of the active interfaces, you can take either of the following actions:

Run the lacp priority command in the interface view to set the LACP interface priority of an inactive interface to 10 or another value as long as the LACP priority of the inactive interface is lower than that of an active interface.
Run the lacp priority command in the interface view to set the LACP interface priority of an active interface to 180 or another value as long as the LACP priority of the active interface is higher than that of any inactive interface.

Prerequisites

The mode lacp-static command has been run in the Eth-Trunk interface view to configure the Eth-Trunk interface to work in static LACP mode.

Configuration Impact

In static LACP mode, active interfaces selected by devices at both ends of an Eth-Trunk link must be the same; otherwise, the link aggregation group cannot be set up.

If the max active-linknumber (Eth-Trunk interface view) command is run on an Eth-Trunk interface in static LACP mode to set the maximum number of active member links, when the number of Up Ethernet interfaces that are manually added to the Eth-Trunk interface exceeds the maximum value, you need to select active interfaces from the Up member interfaces. Running the lacp priority command to set LACP interface priorities ensures that interfaces with high priorities become active in static LACP mode.

If the max active-linknumber (Eth-Trunk interface view) command is not used, if the number of manually added member interfaces is smaller than the default value, you do not need to select active interfaces and all member interfaces are active.

Example

# Set the LACP priority of the member interface GE 0/1/1 to 1.

<HUAWEI> system-view
[~HUAWEI] interface Eth-Trunk 10
[*HUAWEI-Eth-Trunk10] mode lacp-static
[*HUAWEI-Eth-Trunk10] trunkport GigabitEthernet 0/1/1
[*HUAWEI-Eth-Trunk10] quit
[*HUAWEI] interface GigabitEthernet 0/1/1
[*HUAWEI-GigabitEthernet0/1/1] lacp priority 1