The iPhone have no problem. When one iPhone connect one AP, then it can connect wifi, but if this iPhone move to another location and near to another AP, and it can't connect another AP. Only turn off iPhone's wlan and open it again, then it can connect wifi.
Cisco wlc is 8.8.100 (newest version image). All iPhones have the same issues.
Try disabling Fast Transit over the DS (WLANs -> SSID -> Security -> Layer 2). This will probably fix this issue. Had the same issue at a customer site, disabling it fixed this.
With kind regards,
Marcel Tempelman.
Thank you, Marcel.
My version is 8.8.100. There is no Fast transit, and there is Fastlane under traffic shaping. Fastlane is equal to Fast transit?
"5GHz EDCA Fastlane Description—Configuring the EDCA Profile as Fastlane improves Apple device performance on 5GHz networks."
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