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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).
HPES

HPES

Performance Event Meaning

The HPES event indicates the higher-order path errored second.

Performance Event Attributes

Performance Event ID Performance Event Type

0x31

SDH performance event

Impact on the System

If bit errors occur in the services, identify the causes and rectify the fault immediately. Otherwise, alarms will be generated and the signal transmission quality will be affected. If bit errors exceed the B3 bit error threshold-crossing threshold and degrade threshold, the B3_EXC and B3_SD alarms will be generated.

Possible Causes

The HPES performance event occurs when one or multiple bit error blocks are detected in one second or, when the LOS, LOF, and MS_AIS alarms are detected on the optical interface, or when the AU_AIS, AU_LOP, HP_UNEQ, and HP_TIM alarms are detected over the path.

External causes:

  • The fiber performance is degraded, and the fiber has high attenuation.

  • The fiber connector is dirty or incorrect.
  • The equipment is poorly grounded.
  • A severe interference source is present near the equipment.
  • 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 is excessive, the transmit circuit at the opposite end is faulty, or the receive circuit at the local end is faulty.

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

Relevant Alarms

Alarm Name Correlation

B3_EXC

B3 bit errors crossing the threshold

B3_SD

Signals degraded (B3)

R_LOS

The signal on the receiver line side is lost.

R_LOF

The out-of-frame fault occurs on the receiver line side.

MS_AIS

Multiplex section alarm indication

AU_AIS

AU alarm indication

AU_LOP

AU pointer loss

HP_UNEQ

Higher-order path unequipped

HP_TIM

Higher-order path trace identifier mismatch

Procedure

  1. If the R_LOS or R_LOF alarm occurs, a fiber cut, severe attenuation, received overload, or faulty board may exist.
    1. Add an attenuator if the received optical power is overloaded.
    2. Check whether the fiber is intact and whether the optical connector is securely connected. Clean the fiber connector.
    3. Replace the board.
  2. The MS_AIS alarm occurs.
    1. Check whether the transmit end of the line board at the opposite station is configured with insertion of the MS_AIS alarm. If the insertion is set, cancel the setting.
    2. Check whether the transmit unit of the line board at the opposite station is faulty. If any fault exists, replace the line board at the opposite station.
    3. Perform a fiber self-loop to check the line board at the local station. Reset or replace the board to check whether the alarm is cleared.
  3. The MS_AIS alarm occurs.
    1. 1. For the AU_AIS alarm caused by MS_AIS, R_LOS, and R_LOF, analyze the MS_AIS, R_LOS, and R_LOF alarms to locate the faults.
    2. 2. Another cause may be that the receiving and transmitting of the VC-4 path services mismatch. And this causes that AU-AIS occurs on the VC-4 paths. In this case, TU_AIS occurs on the corresponding TU channels. Check the station on which the AU_AIS alarm occurs and the stations that communicate services with the AU_AIS station. Check whether the service timeslots are correctly allocated at the intermediate service pass-through station. If the configuration is not correct, re-issue the configuration.
    3. Perform a fiber self-loop to check the opposite station. If the alarm persists, replace the corresponding line board, and system control, switching, and timing board.
    4. Perform a fiber self-loop to check the line board at the local station. Check whether the alarm is cleared by resetting or replacing boards.
  4. The AU_LOP alarm occurs.
    1. Check whether service configurations are correct at the local and opposite stations. If not, configure them correctly.
    2. Perform a fiber self-loop to check the opposite station. If the alarm persists, replace the corresponding system control, switching, and timing board, and line board to locate the fault.
    3. Replace the CXL board at the local station.
  5. If the HP_UNEQ alarm occurs, check the configuration to determine whether the C2 byte is correctly configured. If not, modify the configuration and apply it again. If yes, the board is faulty. In this case, replace the faulty board.
  6. The HP_TIM alarm occurs.
    1. Check whether the J1 configuration of the higher-order path in the opposite line board is consistent with the J1 configuration to be received at the local station. If the configuration is inconsistent, apply the configuration again after modification.
    2. Check the service configuration of the opposite station and the local station. If the configuration is not correct, modify the configuration and apply it again.
    3. Perform loopbacks at both stations interconnected. Check the equipment at the local and opposite stations. Locate the faulty side and replace the faulty line board, and system control, switching, and timing board.
  7. See HPBBE.

Reference

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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