Validation rules

Validation	Error/Warning/Prompt
`qos trust <UNSUPPORTEDDEVICETYPE>`	Invalid input: %s
`no qos trust <ANYVALUE>`	Invalid command. To disable trust for a port, use `qos trust none`. To return to the default configuration and leave priority information unchanged, use `qos trust default`.
QoS priority when trust mode is anything other than `<NONE>` or `<DEFAULT>`.	The port QoS trust mode must be `<DEFAULT>` or `<NONE>` to configure the QoS port priority feature.
QoS DSCP when trust mode is anything other than `<NONE>` or `<DEFAULT>`.	The port QoS trust mode must be `<DEFAULT>` or `<NONE>` to configure the QoS port priority feature.
`QoS trust dot1.p` when any port QoS priority is enabled.	The port QoS priority feature must be disabled before configuring this port QoS trust mode.
QoS trust ip-prec when any port QoS priority is enabled.	The port QoS priority feature must be disabled before configuring this port QoS trust mode.
QoS trust DSCP when any port QoS priority is enabled.	The port QoS priority feature must be disabled before configuring this port QoS trust mode.
QoS trust device when any port QoS priority is enabled.	The port QoS priority feature must be disabled before configuring this port QoS trust mode.