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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).
TUPJCHIGH

TUPJCHIGH

Performance Event Meaning

The TUPJCHIGH event indicates the count of positive TU pointer justifications.

Performance Event Attributes

Performance Event ID Performance Event Type

0xaa

SDH performance event

Impact on the System

A small count of pointer justifications does not affect the services, whereas a large count of pointer justifications causes bit errors in the services. If a large count of pointer justifications occurs, identify the causes and rectify the fault immediately. Otherwise, alarms will be generated and the signal transmission quality will be affected.

Possible Causes

External causes:

  • The fibers are incorrectly connected, resulting in clock loop between NEs.

  • If the NEs trace the external clock, check the quality of the external clock.

Human factors:

  • The configuration of the clock source is incorrect. There are two clock sources in one network.

  • The configuration of the clock source tracing priority is incorrect. The clocks of the two NEs trace each other.

Equipment problems:

  • The line board is faulty. As a result, the clock is of poor quality.

  • The tributary board is faulty. As a result, the clock is of poor quality.
  • The timing unit is faulty, providing poor-quality timing source or being unable to lock the traced timing source.

Relevant Alarms

Alarm Name Correlation

LP_CROSSTR

Performance threshold-crossing of the lower-order path

Procedure

  1. For non-network-wide pointer justification, check whether a fiber is correctly connected.
  2. If the NEs trace the external clock, check the quality of the external clock. If the external clock is of poor quality, modify the tracing configuration of the external clock.
  3. Check whether the service configurations are correct. If not, modify the service configurations and apply them again.
  4. Analyze the pointer justification performance events, and locate the faulty point by changing the position of the clock source and clock tracing direction.

Reference

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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