Network traffic is processed based on classification and policies that are created and applied to the traffic.
QoS trust is by default disabled.
Create a dot1p trust map:
trust dot1p-map dot1p-trust-map
switch(config-tmap-dot1p-map)#
Define the set of values to match the class:
qos-group 3 dot1p 0-4
qos-group 5 dot1p 5-7
Apply the map on a specific interface or on global level:
trust-map dot1p dot1p-trust-map
trust-map dot1p dot1p-trust-map