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05-02-2017 09:40 AM - edited 05-02-2017 09:42 AM
05-02-2017 09:40 AM - edited 05-02-2017 09:42 AM
[HPE 1920-48G - JG927A] - Control Fans Speed
Hello,
Is there a way to reduce default fans speed of HP Switchs ?
We recently installed 2x 1920-48G (non-poe) but they are very noisly, even in a 17°c environement ...
I've a Telnet access with "_cmdline-mode on" but i can't find any command to display or control default fan speed .... :(
Software Version : 5.20.99 Release 1115
BootRom : 119
Regards.
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05-03-2017 07:11 AM - edited 05-03-2017 07:27 AM
05-03-2017 07:11 AM - edited 05-03-2017 07:27 AM
Re: [HPE 1920-48G - JG927A] - Control Fans Speed
That's interesting. It's really undoubtfully noisy to be a non PoE/PoE+ 48 Gigabit Ethernet fixed ports Switch.
Never checked if just a display fan CLI command ever exists on those models.
A thing one can note is that the non-PoE+ model HPE OfficeConnect 1920 48G Switch (J927A)'s QuickSpecs reports a just one fixed acoustic pressure level (49,7 dB) instead the PoE+ model HPE OfficeConnect 1920 48G PoE+ Switch (J928A)'s QuickSpecs reports two acoustic pressure levels (Low speed fan: 47 dB, High speed fan: 49,3 dB)...and the general Overiew reports this statement: "...utilizes variable-speed fans..." (read it under Green IT and Power paragraph).
Another interesting thing is that, AFAIK, no HPE OfficeConnect 1920 owns a temperature sensor (and so reported temperature on web UI - even if it is 0°C - is just a cosmetic bug)...so, eventually, if fan speed is really variable (on PoE+ models), it is so automatically and in relationship with something (maybe CPU Load? amount of PoE ports really supplying power to devices? etc.) that isn't directly related to Switch internal or Ambient temperatures.
I'm not an HPE Employee
