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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The SRV_LOOP_LD alarm indicates that an Ethernet service loop occurs. This alarm is reported when such a loop is detected.


Alarm Severity Alarm Type


Service alarm


When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning
Parameters 1

VLAN ID: Indicates the VLAN where a loop occurs.

Impact on the System

A service loop exists on the network.

Possible Causes

Cause 1: A service loop on the network is detected.


  1. Cause 1: A service loop on the network is detected.
    1. Identify the node that causes the loop and rectify it. Then, check whether the alarm is cleared.
    2. If the alarm persists, contact Huawei technical support engineers.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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