"Yannis Aribaud" <b...@d6bell.net> writes: > Package: ethtool > Version: 1:4.19-1 > Severity: important > I'm facing a very strange behavior. The command ethtool -m report the > transceiver DOM values correctly, but when the command output is redirected > to an other program, values change to somthing else.
AFAICS, your SFP+ is reporting strange values in either case. I do not think any of these are correct. Looking at the non-redirected one: > Laser output power : 3.0768 mW / 4.88 dBm This is insanely high. > Receiver signal average optical power : 1.2298 mW / 0.90 dBm > Module temperature : 48.47 degrees C / 119.24 degrees F > Module voltage : 1.2336 V Should be 3.3 V > Laser bias current high alarm threshold : 4.744 mA > Laser bias current low alarm threshold : 49.896 mA Right... > Laser output power high alarm threshold : 2.5701 mW / 4.10 dBm I don't think this can be trusted either, but I do note that it is lower than your current output. > Laser output power low alarm threshold : 0.8224 mW / -0.85 dBm > Laser output power high warning threshold : 0.8224 mW / -0.85 dBm > Laser output power low warning threshold : 0.8224 mW / -0.85 dBm Strange limits. There are too many -0.85 dBm values here. > Module temperature high alarm threshold : 0.00 degrees C / 32.00 degrees F > Module temperature low alarm threshold : 0.00 degrees C / 32.00 degrees F > Module temperature high warning threshold : 0.00 degrees C / 32.00 degrees F > Module temperature low warning threshold : 0.00 degrees C / 32.00 degrees F Makes no sense at all. > Module voltage high alarm threshold : 0.4356 V > Module voltage low alarm threshold : 0.0000 V > Module voltage high warning threshold : 0.0000 V > Module voltage low warning threshold : 0.0000 V Makes even less sense. > Laser rx power high alarm threshold : 0.8224 mW / -0.85 dBm > Laser rx power low alarm threshold : 0.8224 mW / -0.85 dBm > Laser rx power high warning threshold : 0.8224 mW / -0.85 dBm > Laser rx power low warning threshold : 0.8224 mW / -0.85 dBm ... To me it looks like you are just reading arbitrary numbers from the SFP+. Try replacing it and see if the results are more reliable. Bjørn
