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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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Configuring the Device MAC Address

Configuring the Device MAC Address


Billions of devices exist on global networks, and each device has a MAC address. MAC addresses are managed and allocated by the IEEE. Theoretically, each device has a unique MAC address. However, MAC address conflicts may occur because of incorrect configuration. In addition, you may need to use a specified MAC address for a device to suit your network requirements. To avoid address conflicts and ensure configurations match rules, you may need to change the MAC address on a device.


Each device is assigned a global unique identifier from the manufacturer. Do not change the MAC address of a device unless the change is absolutely necessary. If you change a MAC address, the modification takes effect only after the device restarts.

When changing the MAC address, pay attention to the following points:
  • The MAC address cannot be all 0s or all 1s.
  • The MAC address cannot be a multicast MAC address.
  • If a device supports 16 MAC addresses, the last hexadecimal digit of the MAC address must be 0. If a device supports 256 MAC addresses, the last two hexadecimal digits of the MAC address must be 0.


  1. (Optional) Run:

    display system-mac

    The current and default MAC addresses of the device are displayed.

  2. Run:

    set system-mac current hex-string [ chassis chassis-id ] ( The chassis chassis-id parameter is valid only in a CSS. )

    The current MAC address of the device is configured.

    After configuring the device MAC address, restart the device for the configuration to take effect.

Updated: 2019-08-21

Document ID: EDOC1000142080

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