Jerome Henry wrote a great forum post here pointing out some non-FT clients will still not connect because they cannot handle the FT Information Elements (IE) included in the SSID’s beacons. This will allow non-FT devices to connect without FT and FT compatible devices to use FT.
This is because the SSID already supports FT so there is no need for iOS devices to Adapt their security.
Then double-click the Microsoft Hosted Network Adapter to open its properties. In the Device Manager window, click View and select Show hidden devices. We spun up our lab to test it out and these are the findings. Then select 802.11d and Enable (or Long only) from the Value drop-down menu. One such opportunity occurred two weeks ago when a customer wanted to use our voice clients with Fast Transition (the IEEE’s feature name for the 802.11r amendment), but had older Cisco phones on the same SSID that do not support FT. There is an awesome culture within Vocera of doing as much as we can to provide guidance to our customers, even when that means providing assistance on another vendors equipment. I myself totally misunderstood how their FT Adaptive mode worked until two weeks ago. In particular mixing non-FT and FT clients on the same SSID, and the role of Adaptive mode. I see questions come up more and more often around Cisco’s Fast Transition settings (aka FT or 802.11r).