Lee, sounds like you're hitting this hardware issue:
https://supportforums.cisco.com/document/105346/calibration-fix-1260-3500-series-aps-csctu24972-cscty68030

I had a few 3500s go all rebooty on me, I've been able to get them all back
in line. If you can't, there is always the LLHW:
http://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1250-series/product_bulletin_c25-606138.html

-Luke


On Wed, Aug 27, 2014 at 1:37 PM, Lee H Badman <[email protected]> wrote:

>  Suddenly, Cisco 3500 APs on two controllers running 7.6.110 are letting
> go of the controllers frequently, and intermittently. The APs are managed
> on dedicated private space, on the same VLAN as the controllers. The APs
> ARE NOT LOSING IP ADDRESSES OR SWITCH CONNECTIVITY AND NO SWITCHES INVOLVED
> ARE PROBLEMATIC.  It feels suddenly like the VLAN is going haywire (one
> VLAN among dozens on same switches that are fine), with no explanation
> found yet, or code funkiness.
>
> My question is coming from the code side- has anyone been through this
> sort of condition on Cisco AP/controllers on or near this 7.6.110 code
> version?
>
> APs get good DHCP, find controller, settle in, start serving clients.
> Randomly and frequently, AP will either jump to another controller or fall
> off totally and eventually reboot.
> Condition repeats.
>
> Just looking for ideas from code side, if it’s ringing any bells.
>
> Thanks-
>
> Lee
>
> Lee Badman
> Wireless/Network Architect
> ITS, Syracuse University
> 315.443.3003
> (Blog: *http://wirednot.wordpress.com* <http://wirednot.wordpress.com>)
>
>
>
>  ********** Participation and subscription information for this EDUCAUSE
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>


-- 
=-=-=-=-=-=-=-=-=-=-=-=
Luke Jenkins
Network Engineer
Weber State University

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