WLC 2100 grub prompt load error

Unanswered Question
Jul 31st, 2007
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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. ]



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Overall Rating: 3 (1 ratings)
walthowd80 Wed, 08/01/2007 - 06:23
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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.

Alejandro Corte... Wed, 08/01/2007 - 06:34
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Yes, i saw the same thing, and i called to cisco and they are going to replace mi WLC.

Thank you

Alejandro Corte... Wed, 08/01/2007 - 09:36
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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.

igor.nepochatov Tue, 07/22/2014 - 13:20
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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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