Cisco Nexus 9000 Series Configuration Manual page 21

Overview
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Licensing Requirements
For a complete explanation of Cisco NX-OS licensing recommendations and how to obtain and apply licenses,
see the
About QoS Features
You use the QoS features to provide the most desirable flow of traffic through a network. QoS allows you to
classify the network traffic, police and prioritize the traffic flow, and help avoid traffic congestion in a network.
The control of traffic is based on the fields in the packets that flow through the system. You use the Modular
QoS (MQC) CLI to create the traffic classes and policies of the QoS features.
QoS features are applied using QoS and queuing policies as follows:
• QoS policies include classification and marking features.
• QoS policies include policing features.
• QoS policies include shaping, weighted random early detection (WRED), and explicit congestion
Licensing Requirements, on page 7
About QoS Features, on page 7
Using QoS, on page 8
Classification, on page 8
Marking, on page 8
Policing, on page 9
Queuing and Scheduling, on page 9
Sequencing of QoS Actions, on page 9
High Availability Requirements for QoS Features, on page 10
QoS Feature Configuration with MQC, on page 10
QoS Statistics, on page 10
Default QoS Behavior, on page 11
Virtual Device Contexts, on page 11
Cisco NX-OS Licensing Guide.
notification (ECN) features.
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
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