Owner's Manual

QoS Commands 301
can be configured to one of the trusted states because there is no need to classify the packets
at every switch within the domain.
Use this command to specify whether the port is trusted and which fields of the packet to use
to classify traffic.
For an inter-QoS domain boundary, the port can be configured to the DSCP-trusted state and
apply the DSCP-to-DSCP-mutation map, if the DSCP values are different between the QoS
domains.
To return to the untrusted state, use the
no qos command to apply best effort service.
Example
The following example configures the system in basic mode to DSCP trust state.
qos trust (Interface)
The qos trust interface configuration command enables each port trust state while the system is in
basic mode. To disable the trust state on each port, use the
no form of this command.
Syntax
qos trust
no qos trust
Default Configuration
Each port is enabled while the system is in basic mode.
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
Use no qos trust to disable the trust mode on each port.
Use
qos trust to enable trust mode on each port.
Example
The following example configures port g5 in basic mode to default trust state (CoS).
Console (config)# qos trust dscp
Console (config)# interface ethernet g5
Console (config-if) qos trust