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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).
LPFEES

LPFEES

Performance Event Meaning

The LPFEES event indicates the lower-order path far end errored second.

Performance Event Attributes

Performance Event ID Performance Event Type

0x94

SDH performance event

Impact on the System

If bit errors occur in the services on a remote NE but no related alarms are reported on the remote NE, the system will not be affected. However, it is required to identify the causes and rectify the fault immediately. Otherwise, alarms will be generated and the signal transmission quality will be affected.

Possible Causes

The LPFEES event occurs when one or multiple bit errors are returned in one second or when the LP_RDI alarm is detected. When the service is at the VC-12 level, the third bit of the V5 byte is verified. When the service is at the VC-3 level, the G1 byte is verified.

External causes:

  • On the opposite equipment, the fiber performance is degraded, and the fiber has high attenuation.

  • The fiber connector is dirty or incorrect at the opposite station.
  • The opposite equipment is poorly grounded.
  • There is a severe interference source around the equipment at the opposite station.
  • The working temperature is high or low, and the opposite equipment cannot tolerate such temperature.

Equipment problems:

  • The signal attenuation on the receive side of the line board at the opposite station is excessive, or the transmit circuit at the opposite station is faulty, or the receive circuit at the local station is faulty.

  • The synchronization performance of the clock is poor at the opposite station.
  • The cross-connect unit and the line board, or the cross-connect and the tributary board poorly match at the opposite station.
  • The tributary board of the opposite equipment is faulty.
  • The fan of the opposite equipment becomes faulty.
  • The board of the opposite equipment becomes faulty or the performance of the board is degraded.

Relevant Alarms

Alarm Name Correlation

LP_REI

Bit errors occur on the lower-order path at the remote end.

LP_RDI

Lower-order path remote defect indication

Procedure

  1. The LP_RDI alarm occurs.
    1. Check whether the TU_AIS or the TU_LOP alarm is reported on the corresponding path of the tributary board at the opposite station. If yes, clear it and then the LP_RDI alarm should be cleared.
    2. If no alarm is reported at the opposite station or if the LP_RDI alarm persists after the corresponding alarms are cleared, the board is faulty. Replace it.
  2. See LPBBE.

Reference

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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