No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


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.

Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring Active/Standby Switchover

Configuring Active/Standby Switchover


If the system active MPU becomes faulty, you can perform an active/standby MPU switchover.

After a command is executed to perform an active/standby switchover on a standalone device, the standby MPU becomes the new active MPU, and the active MPU restarts and then becomes the new standby MPU.

Figure 2-1 shows change of roles after an active/standby switchover in a CSS is triggered by commands.
Figure 2-1  Change in roles after a command-triggered active/standby switchover
  • The original standby switch becomes the master switch, and the original system standby MPU becomes the system active MPU.
  • The original system active MPU becomes a candidate system standby MPU, and the original master switch becomes the standby switch.
  • The standby MPU of the original master switch becomes the system standby MPU and synchronizes data with the system active MPU.

Before running a command to perform an active/standby switchover in a CSS, ensure that the master switch in the CSS has two MPUs.

Before performing an active/standby switchover, check whether MPUs meet switchover requirements. Do not perform an active/standby switchover on a device in any of the following situations:
  • The file system is in use. For example, a file or directory is being created, deleted, or saved.

  • The device is loading or deleting LPU information, including the following operations:
    • Hot swap LPUs.

    • Use commands to reset LPUs.

  • The active and standby MPUs have different memory sizes.

During an active/standby switchover, do not insert, remove, or reset active and standby MPUs, LPUs, power modules, or fan modules. Otherwise, the device may restart or become faulty.


  1. (Optional) Run:

    display switchover state

    The active/standby switchover status is displayed. According to the status, you can determine whether the active and standby MPUs meet switchover requirements.

  2. Run:


    The system view is displayed.

  3. Run:

    slave switchover enable

    Active/standby switchover is enabled.

    By default, the active/standby switchover function is enabled.

  4. Run:

    slave switchover

    An active/standby switchover is performed.

Updated: 2019-12-28

Document ID: EDOC1000142080

Views: 123950

Downloads: 155

Average rating:
This Document Applies to these Products

Related Version

Related Documents

Previous Next