QOS configuration

[ssweehinlew]

To enable to QOS feature globally on switches, the command below should be applied on the core switches or the POE switches that connected to the core switches?

Switch(config)#mls qos

POE switches:

Switch(config)#interface GigabitEthernet <interface ID>

Switch(config-if)#auto qos voip trust 

Any other command can be used to verify whether it is configured successfully?

[Reza Sharifi]

the "auto qos voip trust" command applies to the core switch.

trust —When you enter the auto qos voip trust interface configuration command on a port connected to the interior of the network, the switch trusts the CoS value in ingress packets (the assumption is that traffic has already been classified by other edge devices).

link:

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/QoSDesign.html

You can use "sh run int gix/x to verify the config.

HTH

[ssweehinlew]

The core switch, WS-C3650-24TS  does not support the command "mls qos" and "auto qos voip trust". It cannot be done globally. 

I can only apply the "auto qos voip trust" on switchport level.