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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: LAN Heartbeat Lost (Major, Synchronous GE)

MM: LAN Heartbeat Lost (Major, Synchronous GE)


Alarm message:

LAN heartbeat lost

This alarm is generated when the active and standby MM910s are detected and a sensor detects that the heartbeat of a synchronous network port is lost.

This alarm is generated by the following sensor:

Synchronous GE


Alarm ID

Alarm Severity

Auto Clear




Impact on the System

The data of the active and standby MM910 cannot be synchronized, and the active/standby failover command cannot be executed successfully.

Possible Causes

The communication between synchronous network ports is disconnected.


  1. Obtain the static IP address of the standby HMM from the network plan.
  2. Check whether you can log in to the CLI of the standby HMM using the IP address.

    • If yes, go to 3.
    • If no, go to 6.

  3. Run the ifconfig command and record the IP addresses and subnet masks of the eth1 and eth2 of the standby HMM.
  4. Obtain the IP addresses and subnet masks of the eth1 and eth2 of the active HMM in the same way, and check whether the eth1 and eth2 of the active and standby HMMs are in the same network segment.

    • If yes, go to 6.
    • If no, go to 5.

  5. On the CLI of the standby HMM, run the reboot command to restart the HMM. After the HMM is restarted, check whether the alarm is cleared.

    • If yes, no further action is required.
    • If no, go to 6.

  6. Log in to the standby HMM through the serial port and collect the serial port log information about the last 10 minutes.
  7. Contact Huawei technical support.
Updated: 2018-08-16

Document ID: EDOC1000015902

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