Hi,
I came across some of the commands which are helpful to check the QoS :
1) show wlan ssid-profile <profile name >
which will show the output with WMM details whether it is enabled or disabled.
a) DSCP mapping for WMM voice AC
b) DSCP mapping for WMM video AC
2) show profile-list qos-profile
to check if there is profile configured
3) show wlan wmm-traffic-management-profile
to see see Traffic Management Profile that allocates all of the bandwidth tracked by bandwidth control to the virtual AP profile defined for voice
4) show wlan voip-cac-profile
Please do comment of this and let me know additionally what do i check in controller from client perspective or QoS perspective....