Information About IPv6 Non-AVC QoS Support
From Cisco IOS XE Amsterdam 17.2.1, the IPv6 Non-AVC QoS feature is supported on Fabric and FlexConnect local switching, where QoS is performed at the AP, on par with the IPv4 functionality.
This feature is not supported on Cisco Aironet 1700 Series Access Points, Cisco Aironet 2700 Series Access Points, and Cisco Aironet 3700 Series Access Points.
The following actions are supported for IPv6 Non-AVC QoS:
Marking the DSCP value for IPv6 packets
Dropping IPv6 packets based on the DSCP value
Policing IPv6 traffic