HP_LOM
Description
The HP_LOM is an alarm indicating that a higher order path (HP) multiframe is lost.
Attribute
Alarm Severity | Alarm Type |
| Major | Communication alarm |
Parameters
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 | Indicates the ID of the port on the board. |
| Parameter 2, Parameter 3 | Indicates the ID of the AU-4 path. |
Impact on the System
The alarm will interrupt path-level services.
Possible Causes
- Cause 1: The service level is inconsistent between the source and sink ends.
- Cause 2: The cross-connect and clock board is faulty. As a result, the H4 byte is lost or incorrect.
Procedure
- Query this alarm on the NMS and determine the IDs of the port and path that report the alarm.
- Check whether the level is consistent between the peer to-be-transmitted service and the local to-be-received service. If the service level is inconsistent, change the service level at either end to keep its consistency. Then, check whether the HP_LOM alarm is cleared.
- If the alarm persists, replace the cross-connect and clock board.
- Check whether the alarm is cleared. If the alarm persists, contact Huawei technical support engineers to handle the alarm.
