Did somebody find the root cause or solution of the problem? I still cannot find related registered bug and I do not want to experiment with 8.5. :|
On our case we hit this bugCSCve57121 ( https://bst.cloudapps.cisco.com/bugsearch/bug/CSCve57121/?reffering_site=dumpcr ) and TAC recommended us to upgrade to 126.96.36.199 MR. So far no more disconnections experienced by user.
Seeing this on AireOS 188.8.131.52 with Cisco 2802 APs.
Windows 7 Device shows limited connectivity, the ARP entry is gone for the gateway.
The WLC shows client in run state and fully associated and authenticated.
Can see Client is continually broadcasting FF:FF:FF:FF:FF:FF on the air, to resolve, client needs to disconnect/reconnect or wait for EAP re-key to resume access and for limited conncectivity to disappear.
Issue does not occur at set time, same AP will still be serving other clients.