In Ruckus Best Practice (https://support.ruckuswireless.com/documents/2339-smartzone-voice-over-ip-voip-best-practices-design... ) I have found info that "Enabling 802.11r will disable PMK caching and OKC on that SSID."
Seems very strange. Is it so?
No it won't. On my 802.1X WLAN I enabled 802.11r and when checking "show running-config all" my WLAN still has the PMK/OKC enabled.
PMK Caching Support: EnabledOKC Support: Enabled