Details
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Improvement
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Resolution: Fixed
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Minor
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None
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Professional Edition
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None
Description
Some SFP modules have invalid alarm/warning limits in their EPROM, for example:
Current Alarms Warnings
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Measurement High Low High Low
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----------------------------------------------------------------------------
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Temperature 41.08 C 100.00 C -10.00 C 95.00 C -5.00 C
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Voltage 3.27 V 3.59 V 2.90 V 3.50 V 3.00 V
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Current 20.29 mA 100.00 mA 1.00 mA 80.00 mA 2.00 mA
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Tx Power -6.00 dBm 6.99 dBm -15.08 dBm 4.99 dBm -13.01 dBm
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Rx Power -7.42 dBm 1.99 dBm 0.00 dBm 0.00 dBm -30.00 dBm
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Here the Rx Power alarm range is 0 dBm to 1.99 dBm, and warning range is -30 dBm to 0 dBm.
It is just a normal (but probably cheap) 1000BASE-LR transceiver.
Obviously the alarm limits are impossible since alarm/warning ranges do not overlap.
It would be useful if Observium could detect such situations and automatically ignore ranges that are impossible.
