Reference Guide

750 Quality of Service (QoS) Commands
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CLI\files\QoS.fm
DELL CONFIDENTIAL – PRELIMINARY 10/21/13 - FOR PROOF ONLY
User Guidelines
This command can be used only in QoS basic mode.
Packets entering a quality of service (QoS) domain are classified at the edge
of the QoS domain. When the packets are classified at the edge, the switch
port within the QoS domain 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.
When the system is configured with trust DSCP, the traffic is mapped to the
queue by the DSCP-queue map.
When the system is configured with trust CoS, the traffic is mapped to the
queue by the CoS-queue map.
Example
The following example configures the system to the DSCP trust state.
Console(config)# qos trust dscp
qos trust (Interface)
Use the qos trust Interface Configuration (Ethernet, Port-channel) mode
command to enable each port trust state while the system is in the basic QoS
mode. Use the no form of this command to disable the trust state on each
port.
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