On page 2-7 medianet Campus QoS Design 4.0, it describes per-port/per-vlan QoS policies as being for trunk ports only.
If a PC is plugged into an IP phone into a single switch port, and the phone and PC are on different vlans - is that considered a trunk port?
Here is a typical port config we use:
interface GigabitEthernet1/15
switchport
switchport access vlan 6
switchport mode access
switchport voice vlan 910
mls qos trust dscp
spanning-tree portfast