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AR500, AR510, and AR530 V200R007 CLI-based Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring transparent bridge, MAC table, link aggregation, VLANs, STP/RSTP/MSTP, and so on.The document provides the configuration procedures and configuration examples to illustrate the service configuration methods and application scenario.
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(Optional) Setting the LACP System Priority

(Optional) Setting the LACP System Priority


LACP system priority differentiates priorities of devices at both ends. In LACP mode, active interfaces selected by devices at both ends must be consistent; otherwise, the LAG cannot be set up. To keep active interfaces consistent at both ends, you can set the priority of one device to be higher than that of the other device so that the other device can select active interfaces according to those selected by the device with a higher priority.


  1. Run:


    The system view is displayed.

  2. Run:

    lacp priority-command-mode { default | system-priority }

    The configuration mode of the LACP system priority is set.

    By default, the configuration mode of the LACP system priority is default.

    If the lacp priority command used to set the LACP interface priority is executed in the system view, the Eth-Trunk in LACP mode may alternate between Up and Down. To prevent this situation, run the lacp priority-command-mode command in the system view to set the configuration mode of the LACP system priority to system-priority. This mode can be used to differentiate the LACP system priority and LACP interface priority.

  3. Use either of the following methods to set the LACP system priority based on the configuration mode.
    • default mode

      Run the lacp priority priority command to set the LACP system priority.

    • system-priority mode

      Run the lacp system-priority priority command to set the LACP system priority.

    A smaller LACP priority value indicates a higher priority. By default, the LACP system priority is 32768.

    The end with a smaller priority value functions as the Actor. If the two ends have the same priority, the end with a smaller MAC address functions as the Actor.

Updated: 2019-05-25

Document ID: EDOC1000097279

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