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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The ERPS_BLOCK alarm indicates that a port on the ERPS ring is blocked when protection switching is triggered (not in the idle state).


Alarm Severity Alarm Type
Minor Equipment 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

Parameter 1 - Parameter 2

Indicate the ID of an ERPS instance.

Impact on the System

The alarm does not affect the system.

Possible Causes

Cause 1: When ERPS protection switching occurs, a port on the ERPS ring is blocked.


  1. Cause 1: When ERPS protection switching occurs, a port on the ERPS ring is blocked.
    1. In revertive mode, check the ERPS_BLOCK alarm to determine the blocked point. After the fault is rectified, the alarm is automatically cleared.
    2. In non-revertive mode, after the fault is rectified, perform the clear operation on the owner node to clear the alarm.
      • In the NE Explorer, choose Configuration > Packet Configuration > Ethernet Protection > ERPS Management.
      • In the right pane, right-click Destination Node corresponding to ERPS and choose Clear from the shortcut menu.
  2. Check whether the alarm is cleared. If the alarm persists, contact Huawei technical support engineers to handle the alarm.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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