Chapter - Cisco Nexus 7000 Series Configuration Manual

Overview
This chapter describes the configurable Cisco NX-OS quality of service (QoS) features on the Cisco NX-OS
device.
QoS allows you to classify the network traffic, police and prioritize the traffic flow, and help avoid traffic
congestion in a network.
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Information 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 provide congestion avoidance. The
control of traffic is based on the fields in the packets that flow through the system. You use the Modular QoS
CLI (MQC) to create the traffic classes and policies of the QoS features.
QoS features are applied using QoS policies and queuing policies are as follows:
• QoS policies include the policing feature and the marking features.
• Queuing policies use the queuing and scheduling features as well as a limited set of the marking feature.
Note
The system-defined QoS features and values that are discussed in another chapter of this configuration guide
apply globally to the entire switch and cannot be modified. For complete information on virtual device contexts
(VDCs), see the Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide.
Information About QoS Features, on page 3
High Availability Requirements for QoS Features, on page 6
QoS Feature Configuration with MQC, on page 7
QoS Statistics, on page 7
Default QoS Behavior, on page 7
QoS Policies on Fabric Extenders, on page 8
C H A P T E R
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide
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