Allied Telesis AT-S95 CLI (AT-8000GS Series) - Manual (Page 218)

Page 218
Allied Telesis
AT-8000GS Command Line Interface User’s Guide
qos trust (Global)
The qos trust Global Configuration mode command configures the system to basic mode and the trust state. Use
the no form to return untrusted state.
Syntax
qos trust {cos | dscp}
no qos trust
Parameters
•
cos — Classifies ingress packets with the packet CoS values. For untagged packets, the port default CoS is
used.
• dscp — Classifies ingress packets with the packet DSCP values.
Default Configuration
QoS trust is set to cos.
Command Mode
Global Configuration mode
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 will be mapped to the queue by the DSCP-queue map.
When the system is configured with trust CoS, the traffic will be mapped to the queue by the CoS-queue map.
Example
The following example configures the System to basic mode.
qos map dscp-queue
The qos map dscp-queue Global Configuration mode command modifies the DSCP to CoS map. Use the no
form of this command to return to the default map.
Syntax
qos map dscp-queue dscp-list to queue-id
no qos map dscp-queue
console(config)# qos trust cos