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WLC 2100 grub prompt load error

I load a new image to the wlc but when restar it take me to the grub prom, somebody know how to fix this?

This shows the screen:

Launching BootLoader...

[ Minimal BASH-like line editing is supported. For the first word, TAB

lists possible command completions. Anywhere else TAB lists the possible

completions of a device/filename. ]



New Member

Re: WLC 2100 grub prompt load error

Not sure if this helps, but I read this in the controller release notes:

CSCsd52483?When you make changes in the bootloader of a 2006 controller or a Controller Network Module, the bootup process may halt, and the controller may stop responding. The controller also displays the "grub>" prompt on the console port.

Workaround: Replace the controller.

Re: WLC 2100 grub prompt load error

Yes, i saw the same thing, and i called to cisco and they are going to replace mi WLC.

Thank you

Re: WLC 2100 grub prompt load error

I confirm the bug:

There's a bug open on this issue, see below:


Externally found moderate defect: Assigned (A)

Controller stuck at grub> prompt


A WLC2006, WLC2106 or NM-AIR-WLC6 may seen to display a "grub>" prompt on the console port. It will be unable to boot the

WLC software and will not be able to operate normally.


Replace the hardware.

New Member

I had the same issue, but

I had the same issue, but found different solution. In my case, CF card inside 2106 came loose. In order to re-insert it, top cover has to be removed. It is fairly easy with 3 screws on the bottom of the unit. 

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