Bandwidth and Priority Management at SSID Level
The next step is to take care of the QoS policy at the SSID level. This step applies to both the Catalyst 3850 switch and to the 5760 controller. This configuration assumes that voice and video traffic is identified through the use of class-map and access-lists and is tagged properly. However, some incoming traffic that is not targeted by the access-list may not display its QoS marking. In that case, you can decide if this traffic should be marked with a default value or left untagged. The same logic goes for traffic already marked but not targeted by the class-maps. Use the default copy statement in a table-map in order to ensure that unmarked traffic is left unmarked and that tagged traffic keeps the tag and it not remarked.
Refer the link for the Complete Configuration : www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/116479-configure-qos-00.html#anc15
