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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).
ODUk_PM_AIS

ODUk_PM_AIS

Description

The ODUk_PM_AIS alarm indicates that an NE receives an ODUk PM alarm indication signal (AIS). When detecting a signal fail (SF) condition, an NE sends an AIS signal to its downstream NE. Upon receiving the AIS signal, the downstream NE reports an ODUk_PM_AIS alarm.

k indicates the level of rate, its value is 0, 1, 2, 3, or flex.

Attribute

Alarm Severity Alarm Type

Warning

Communication alarm

Parameters

None

Impact on the System

The signal quality of services carried on the optical port that reports an ODUk_PM_AIS alarm deteriorates.

Possible Causes

  • Cause 1: Signals received contain an ODUk_PM_AIS signal.

    The following figure shows details. NE 1 and NE 2 interconnect with each other, and traffic flows from NE 1 to NE 2. When detecting an ODUk_PM_AIS signal in signals received, the board of NE 1 reports an ODUk_PM_AIS alarm.



  • Cause 2: The opposite board directly connected to the NE that reports an ODUk_PM_AIS alarm reported an ODUk_PM_AIS, OTU_LOF, OTU_LOM, or R_LOS alarm.

    The following figure shows details. NE 1 and NE 2 interconnect with each other, and traffic flows from NE 1 to NE 2. When the board of NE 1 detects an ODUk_PM_AIS, OTU_LOF, OTU_LOM, or R_LOS alarm signal in signals received on the client side, NE 1 sends an AIS signal to NE 2. When detecting the AIS signal, the board of NE 2 reports an ODUk_PM_AIS alarm.



  • Cause 3: The board reporting an ODUk_PM_AIS alarm reported an OTU_LOF, OTU_LOM, or R_LOS alarm.

    The following figure shows details. NE 1 and NE 2 interconnect with each other, and traffic flows from NE 1 to NE 2. When detecting an OTU_LOF, OTU_LOM, or R_LOS alarm signal, the board of NE 2 reports an ODUk_PM_AIS alarm.



  • Cause 4: The board reporting an ODUk_PM_AIS alarm is faulty.

Procedure

  1. Cause 1: Signals received contain an ODUk_PM_AIS signal.
    1. Check whether the alarm is reported. If the alarm is reported, perform a hardware loopback on the transmit and receive optical ports. For details, see Hardware Loopback.

      A hardware loopback interrupts services.

    2. Check whether the alarm is cleared. If the alarm persists, the board reporting the alarm is faulty; in this case, go to 4. If the alarm is cleared, signals received on the client side of the NE contain an ODUk_PM_AIS signal; in this case, rectify the fault in the received signals.
  2. Cause 2: The opposite board directly connected to the NE that reports an ODUk_PM_AIS alarm reported an ODUk_PM_AIS, OTU_LOF, OTU_LOM, or R_LOS alarm.
    1. On the NMS, check for an ODUk_PM_AIS, R_LOS, OTUk_LOF, or OTUk_LOM alarm on the upstream board that directly connects to the NE reporting an ODUk_PM_AIS alarm. If the board reports any such alarms, clear these alarms.
    2. Check whether the ODUk_PM_AIS alarm is cleared. If the alarm persists, go to 3.
  3. Cause 3: The board reporting an ODUk_PM_AIS alarm reported an OTU_LOF, OTU_LOM, or R_LOS alarm.
    1. On the NMS, check for an R_LOS, OTUk_LOF, or OTUk_LOM alarm on the board that reports an ODUk_PM_AIS alarm. If the board reports any such alarms, clear these alarms.
    2. Check whether the ODUk_PM_AIS alarm is cleared. If the alarm persists, go to 4.
  4. Cause 4: The board reporting an ODUk_PM_AIS alarm is faulty.
    1. Check whether a pluggable optical module is installed on the board. If yes, replace the pluggable optical module; if no, replace the board.
    2. Check whether the alarm is cleared. If the alarm persists, contact Huawei engineers to handle the alarm.

Related Information

None

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Updated: 2019-01-21

Document ID: EDOC1100020975

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