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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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The LP_R_FIFO alarm indicates FIFO overflow on the receive side of the lower order path.


Alarm Severity Alarm Type


Equipment alarm



Impact on the System

Bit errors occur in lower order services of the board.

Possible Causes

Possible causes of this alarm are as follows:

  • The service cross-connections are incorrectly configured.
  • The service type is incorrectly configured.


  1. View the LP_R_FIFO alarm on the U2000 to determine the path ID of the board that reports the LP_R_FIFO alarm.
  2. Check whether the configurations of services in the path are correct. Ensure that the service type at the local end is the same as that at the opposite end, and the service cross-connections are correctly configured. Then, the LP_R_FIFO alarm is automatically cleared.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

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