Hi,
I use Netgear, D-Link and Apple routers/access points and relays. All access points work fine for all other attached devices and work for IOS6 devices at least when they are first connected. The IOS6 devices show issues over time across each access point. My routers/access points all have the latest firmware revisions and have not been highlighted as needing a firmware adjustment by the suppliers. I will not be modifying them unless advised by the supplier that this is required.
My controlled testing is indicating that the issue is within IOS6 and builds to a critical point over time. In my case the devices worked fine initially after the upgrade to IOS6 and the wifi connection issues started to appear some time later. If my test results are mirrored in your situation you will see the impacts commence on different timelines for individual devices and individual wifi connection points, depending on the usage patterns.
As I outlined earlier in a parallel thread, my advice is to reset the problem wifi connection -
* start with the IOS6 device that is displaying issues and on the specific wifi network you are having issues with.
* tell the IOS6 device to "forget the network" it is having issues with. (found in the wifi settings area)
* once the IOS6 device has forgotten the wifi network, reboot the IOS6 device with a 'double button' restart (home and power together). This will clear any internal registers or buffers and let you reconnect safe in the knowledge that you are not using 'old' information.
* look for the wifi network again and reestablish your connection from scratch (as you have in the past). This will set up a fresh collection of details for this network.
* this will need to be done for each wifi network that is displaying issues and may be required at later intervals for some wifi networks, depending on connection counts and frequency.
Note that this process does not resolve the root cause of the issue (which my testing is indicating is within IOS6). It only resets the device to a clean state and allows it to function again. Some advice in these threads has suggested to restart the routers as well. I have not restarted my routers or relays since the initial incident, I have been testing without restarting the routers on purpose. The steps I am suggesting seems to work within my test group of devices. My 'reset' process means that I can "scrub clean" my device and start working in public or authorized wifi cells without the need for any action by the host service. This means I am independent of what the cafe or lounge may or may not do.
Today I have reset one of my iPads again. On this attempt I did the 'forget' and 'reestablish' without the 'reboot'. Earlier this afternoon all looked fine but tonight it looks a little flakey again. This is now about 10 hours since the 'clean' process until the return of visible impact where I have been working with a 2 day cycle time with the reboot between the forget and reestablish steps. Next time I will reboot unless I am pressed for time, in which case I will reboot again later in the day when time permits.
If my approach of 'cleaning' my connections when they show issues is too intrusive I plan to modify my protocol so that I forcibly "forget" all networks at the end of each day and then reestablish them the next day as required. My testing, so far, indicates that I can easily survive 24 hours after I have a clean connection.
I am confident we will see this resolved in the near future but predicting the timeline is foolish. This is particularly so if the issue is, as I suspect, buffer related and builds to a critical point over time. This makes it much harder to trace and resolve. My resolution process is focused on letting me get through (with minimal impact on me and my devices) until a formal fix is published.