NO_BD_PARA alarm on an OAU board on an OSN 6800 NE

Question:
Why an OAU board reports a NO_BD_PARA alarm on an OSN 6800 NE of version V100R003 for which ALC is configured?
Root cause:
None
Answer:
ALC is inappropriately configured. As a result, the computed value of a required parameter exceeds the maximum OAU gain (31 dB). There is a bug in the software processing mechanism. Due to this bug, when an OAU board uses the extended gain, the value of computed pump current exceeds the maximum value. As a result, a critical alarm is reported. When the software computes the drop-wavelength parameter table and the computed turning point current exceeds the rated current value, the rated current value is used as the turning point current value.
Impact:
This issue is not triggered under normal configurations. If this issue is triggered, there is no impact on services or functions, and the issue can be rectified by modifying configurations.
Version in which the issue has been resolved: V100R003C02B028

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