@salvi wrote:
We are seeing the same issue with Handheld scanners. They don't work on Mixed Mode. We are only advertising the SSID on one AP, so it's not something with 11n access point.
There are a few devices that do not like mixed mode. Legacy devices are more likely to suffer from tthis. The second reason is devices on an 802.11n AP trying to do anything besides Open or AES.
You have a TAC case opened for this already, right? They should determine which issue it is.