TP-Link T1500 Series - Configuring 802.1 p Priority

Configuration Guide 434
Configuring QoS Class of Service Configuration
The following example shows how to configure the trust mode of port 1/0/1 as untrust,
map the port 1/0/1 to 802.1p priority 1 and map 802.1p priority 1 to TC3:
Switch#configure
Switch(config)#interface gigabitEthernet 1/0/1
Switch(config-if)#qos trust mode untrust
Switch(config-if)#qos port-priority 1
Switch(config-if)#exit
Switch(config)#qos cos-map 1 3
Switch(config)#show qos trust interface gigabitEthernet 1/0/1
Port Trust Mode LAG
-------- --------- --------
Gi1/0/1 untrust N/A
Switch(config)#show qos port-priority interface gigabitEthernet 1/0/1
Port CoS Value LAG
-------- --------- --------
Gi1/0/1 CoS 1 N/A
Switch(config)#show qos cos-map
---------------+-----+-----+-----+-----+-----+-----+----+----
Dot1p Value |0 |1 |2 |3 |4 |5 |6 |7
---------------+-----+-----+-----+-----+-----+-----+----+----
TC |TC0 |TC3 |TC2 |TC3 |TC4 |TC5 |TC6 |TC7
---------------+-----+-----+-----+-----+-----+-----+----+----
Switch(config)#end
Switch#copy running-config startup-config
2.2.2 Configuring 802.1p Priority

Configuring the Trust Mode
Follow these steps to configure the trust mode:
Step 1 configure
Enter global configuration mode