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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The LAN_LOC alarm indicates that the Ethernet communication fails.


Alarm Severity Alarm Type


Communication alarm



Impact on the System

When the network port is faulty or there is a cut in the network cable, the communication at this network port fails. In this case, the communication between the NE and the NMS stops.

Possible Causes

  • The network port is required and is enabled on the NMS. However, the network cable is not connected to the network port or is inappropriately connected.
  • The network port is not required but is enabled on the NMS.
  • The network cable is faulty.
  • The board is faulty.


  1. Query the alarm information on the NMS. Check whether the corresponding network port is required according to the alarm parameters.
    If... Then...

    The corresponding network port is not required

    Disable the port on the U2000.

    The corresponding network port is required

    Verify that the network cable is properly connected to the network port.

  2. If the alarm persists, the network cable may be faulty. In this case, replace the network cable and re-connect it.
  3. If the alarm persists, the auxiliary interface board may be faulty. In this case, replace the faulty board.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 75085

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