Dell PowerEdge VRTX - Manual (Page 790)

790 Quality of Service (QoS) Commands
FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\CLI Folders\Dell Plasma-ARC
2+3\new_system_mifs_ARC2_latest\QoS.fm
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Parameters
• cos— Specifies that ingress packets are classified with packet CoS values.
Untagged packets are classified with the default port CoS value.
• dscp—Specifies that ingress packets are classified with packet DSCP
values.
Default Configuration
CoS is the default trust mode.
Command Mode
Global Configuration mode
User Guidelines
This command can be used only in QoS basic mode.
Packets entering a QoS domain are classified at its edge. 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.
For an inter-QoS domain boundary, configure the port to the DSCP-trusted
state and apply the DSCP-to-DSCP-mutation map if the DSCP values are
different in the QoS domains.
Example
The following example configures the system to the DSCP trust state.
console(config)# qos trust dscp