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Here is the error showing in my log file on an Alcatel router:

5629 2012/01/15 02:41:24.81 EST MINOR: PORT #2030 Base Port 1/2/8
"XFP/SFP DDM (supplyVoltage-high-warning) raised"

When I issue the show port command these are the details provided regarding the voltage:

===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM), Externally Calibrated
===============================================================================
                              Value High Alarm  High Warn   Low Warn  Low Alarm
-------------------------------------------------------------------------------
Supply Voltage (V)             3.51      3.60       3.50!      3.10      3.00

How can this issue be resolved?

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It's not an error, it's a warning. There is a corresponding error, but you're not getting that error. So you don't need to resolve any error. Was anything going on at that time? Were you swapping SFPs or something? – David Schwartz Jan 17 at 10:23
nothing occurred at that time it happened around 2:41 am according to the timestamp no one was working at that time – Mark Scrano Jan 17 at 10:26
The voltage got higher than the SFP believes it should have gotten, but not higher than the SFP is designed to tolerate. There's not much you can do about it. – David Schwartz Jan 17 at 10:34
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Apparently this is a sign that the optics are going bad. The voltage was causing an increased transmission level and was also causing a high optical power alarm. Replacing them fixed the issue.

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