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E9000 Server V100R001 HMM Alarm Handling 19

This document describes E9000 server alarms in terms of the meaning, impact on the system, possible causes, and solutions.
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MM: Communication Loss (Major, SlotN Manage/M Manage)

MM: Communication Loss (Major, SlotN Manage/M Manage)


Alarm message:

FRU communication lost

This alarm is generated if a running board (compute node or switch module) loses communication for over five minutes.

This alarm is generated by the following sensors:

  • SlotN Manage
  • M Manage


Alarm ID

Alarm Severity

Auto Clear








Slot number of the compute node, and ranges from 1 to 32.


Slot number of the switch module, and the values are 1E, 2X, 3X, and 4E.

Impact on the System

A power fault causes the board to lose power. After this occurs, reinstalling the board will burn the MOSFET and even spread the fault.

Possible Causes

The board encounters a power fault.


  1. Obtain the slot number of the board based on the sensor name.

    For example, Slot1 Manage indicates the compute node in slot 1 , and 1E Manage indicates the switch module in 1E slot .

  2. Check whether the power indicator status of the board is on.

    • If yes, go to 4.
    • If no, go to 3.

  3. Directly remove the board and stop using it. . Then go to 5.

    Do not reinstall the board or power off and then on the board.

  4. Power off the board, remove and reinstall it, and power it on again. Then check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 5.

  5. On the HMM WebUI, choose System Management > Information Collection, and collect logs.
  6. Contact Huawei technical support.
Updated: 2018-08-16

Document ID: EDOC1000015902

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