Does anybody know the secret sauce (what obscure config parameter) as to why iPhone and iPads will always complain about connecting to Cisco enterprise wifi.
On a couple of wifi networks with 3702s, 2702s and WLC 5508 or 2504 running 8.1, 8.2 and 8.3 images that I have worked on I have seen the following scenarios with iOS devices.
When making an initial connection to the wifi, the connection fails with a pop up message "unable to connect to... " with an option to dismiss. I can try once more, sometimes twice more and then it connects with.
If I am in an environment with a single AP, there's no issue. If I move to a similar environment where the device has a choice of APs, then I see the issue.
I have read the recent Apple/Cisco best practices and made some of the recommended changes (to the detriment of other 2.4Ghz devices) and no improvement. I have also read that changing the 'client band select' and 'client load balancing' changes the behaviour. Yes, it does, mostly making it worse. I get better result with those options turned off.
One other symptom. The device will automatically connect to an SSID that it knows from a group which as other SSIDs that it also knows. It might not be the SSID I want, so I change. It is at that point that I also get the "unable to connect to ..... " message.
Android doesn't seem to suffer, laptops (win and apple) don't complain either.
Any ideas? Why just these devices? I don't see it on other public wifi and other enterprise wifi, just the ones I have worked on. Is it just me or am I missing a special command to make iOS devices connect cleanly.
