Dell PowerEdge M820 Dell Converged Enhanced Ethernet Command Reference - Page 272
qos trust cos, To set the interface QoS to the trust mode
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16 qos trust cos qos trust cos Specifies the interface QoS trust mode for incoming traffic. Synopsis qos trust cos no qos trust Operands none Defaults The QoS trust CoS mode set to the untrusted state. Command Interface configuration mode Modes Description Use this command to specify the interface ingress QoS trust mode, which controls user priority mapping of incoming traffic. The untrusted mode overrides all incoming priority markings with the Interface Default CoS. The CoS mode sets the user priority based on the incoming CoS value, if the incoming packet is not priority tagged, then fallback is to the Interface Default CoS value. Use the no qos trust command to return to the default. Usage Guidelines When a CEE map is applied on an interface, the qos trust command is not allowed. The CEE map always puts the interface in the CoS trust mode. This command is not applicable for port-channel interfaces. Examples To set the interface QoS to the trust mode: switch(conf-if-te-0/1)#qos trust cos To return the interface QoS to the default value or to the untrusted state: switch(conf-if-te-0/1)#no qos trust When a CEE map is applied, the switch does not allow the qos trust cos command and displays the following error: switch(conf-if-te-0/1)#cee demo switch(conf-if-te-0/1)#qos trust cos % Error: QoS is not in non-CEE Provisioning mode See Also qos cos, show qos 256 Dell Converged Enhanced Ethernet Command Reference 53-1002115-01