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Bring performance and reliability to your network with the Aruba Core, Aggregation, and Access layer switches. Discuss the latest features and functionality of the ArubaOS-Switch and ArubaOS-CX devices, and find ways to improve security across your network to bring together a mobile first solution.
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Aruba 2540 Fan Speed Issue

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  • 1.  Aruba 2540 Fan Speed Issue

    Posted Sep 10, 2019 09:09 AM



    I have just inboxed 6 brand new Aruba 2540 switches to configure for one of our customers however I am having an issue with one of the switches in which the fans are constantly at max speed (Same speed as when they are booting), I was on the phone to HP for an hour earlier as the 'heartbeat' LED was flashing at the same time the fans were at full speed. We managed to fix the flashing LED by changing the firmware however the fan issue is still there.. 


    Does anyone have an ideas why and how I can fix it without RMA'ing the switch?


    Thank you!


  • 2.  RE: Aruba 2540 Fan Speed Issue

    Posted Sep 11, 2019 02:45 AM



    Seems an hardware issue to me. The temperature sensor or the fan controller might be defective. Don't think you can fix this in software.

  • 3.  RE: Aruba 2540 Fan Speed Issue

    Posted Sep 11, 2019 10:12 AM

    Can you report the output of the show system fan command?


    It should show you something similar to:


    aruba2540-jl355a# show system fans
    Fan Information
      Num  | State       | Failures | Location 
    Fan-1  | Fan OK      |   0      | Chassis 
    0 / 1 Fans in Failure State
    0 / 1 Fans have been in Failure State




  • 4.  RE: Aruba 2540 Fan Speed Issue
    Best Answer

    Posted Sep 11, 2019 12:10 PM

    UPDATE: The switch was sent back to HP and a replacement was sent out. Thanks for the helpful comments!