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5520 Wireless Controller Appliance Fan Noise

Hi, 

We have a 5520 WLC which is producing a very loud fan noise.

Is there a way from SSH or BIOS I can turn the speed down? 

When logging in to the console there is no "show environment" command available which is something that has been suggested.

 

5 REPLIES
VIP Purple

Re: 5520 Wireless Controller Appliance Fan Noise

5520 wlc has this problem.

 

which version of SW you are running.. ?

check this poss: https://supportforums.cisco.com/t5/other-wireless-mobility-subjects/cisco-wlc-5520-periodically-making-huge-fan-sound/td-p/2920157

 

aslo chekc the bug: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCux93468

 

Regards

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New Member

Re: 5520 Wireless Controller Appliance Fan Noise

What command shows the version on a 5520?

New Member

Re: 5520 Wireless Controller Appliance Fan Noise

Software Version 8.1.102.0

VIP Purple

Re: 5520 Wireless Controller Appliance Fan Noise

8.1.102.0 is already deffered from cisco. You must update the software version on WLC.

you can update to 8.2.166.0 and check again.

 

https://software.cisco.com/download/release.html?mdfid=286284738&softwareid=280926587&release=8.1.102.0

 

Regards

Dont forget to rate helpful posts

Hall of Fame Super Gold

Re: 5520 Wireless Controller Appliance Fan Noise


michaeljaallen wrote:

Software Version 8.1.102.0


That's a known bug, CSCux93468.

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