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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
LP_CROSSTR

LP_CROSSTR

Description

The LP_CROSSTR alarm indicates that the number of lower order path bit errors crosses the threshold.

Attribute

Alarm Severity Alarm Type

Minor

Service 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 performance monitoring period.

  • 0x01: The monitoring period is 15 minutes.
  • 0x02: The monitoring period is 24 hours.

Parameter 2, Parameter 3

Indicate the ID of the threshold-crossing performance item.

Impact on the System

The quality of services on the board that reports the LP_CROSSTR alarm deteriorates, or the services may be interrupted.

Possible Causes

Possible causes of this alarm are as follows:

  • The performance of the laser on the line board at the opposite end deteriorates.
  • The clock performance at the local or opposite end deteriorates.
  • The receive optical power of the line board at the local end is out of range.
  • The optical fiber performance deteriorates.

Procedure

  1. Check whether the performance of the laser on the line board at the opposite end deteriorates.

    If... Then...
    The laser performance deteriorates

    Replace the laser. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.

    The laser performance does not deteriorate

    Go to the next step.

  2. Check whether the clock performance at the local or opposite end deteriorates.

    If... Then...

    The clock performance deteriorates

    Re-configure clock tracing. After the configured performance monitoring period ends, check whether the alarm is cleared. If the alarm persists, go to the next step.

    The clock performance does not deteriorate

    Go to the next step.

  3. Check whether the receive optical power of the line board at the local end is out of range.

    If... Then...
    The receive optical power is higher than the upper threshold Use an optical power attenuator to decrease the value of the receive optical power. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.
    The receive optical power is lower than the lower threshold Increase the value of the input optical power. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.
    The receive optical power is within the specified range Go to the next step.

  4. Perform loopbacks at the local end and the opposite end to locate the faulty board.

    If... Then...
    The timing unit at the opposite end reports a higher order adaptation performance event The timing unit at the opposite end is faulty. Replace the system control, cross-connect, and timing board. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.
    The timing unit at the local end reports a higher order adaptation performance event The timing unit at the local end is faulty. Replace the system control, cross-connect, and timing board. Then, check whether the alarm is cleared. If the alarm persists, go to the next step.

  5. Check whether the optical fiber performance deteriorates.

    If... Then...
    The optical fiber performance deteriorates Replace the optical fiber.
    The optical fiber performance does not deteriorate Contact Huawei technical support engineers to handle the alarm.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 76502

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