Qos Trust (Global) - Cisco 300 Series Cli Manual

49
828

49.32 qos trust (Global)

Use the qos trust Global Configuration mode command to configure the system to
the basic mode and trust state. Use the no form of this command to return to the
default configuration.
Syntax
{cos | dscp}
qos trust
no qos trust
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
DSCP 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.
Quality of Service (QoS) Commands
78-21075-01 Command Line Interface Reference Guide