Troubleshooting Qos Issues; Policy Maps - Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual

S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .

Troubleshooting QoS Issues

The Cisco Nexus 5000 Series NX-OS quality of service (QoS) provides the most desirable flow of traffic
through a network. QoS uses policies and flow control to classify the network traffic, police and
prioritize the traffic flow, and provide congestion avoidance.
This chapter describes how to identify and resolve problems that can occur with QoS in the Cisco Nexus
5000 Series switch.
This chapter includes the following sections:
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Policy Maps

The Nexus 5000 QoS implementation follows the Cisco Modular QoS CLI model. It takes three steps to
configure the QoS:
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The Nexus 5000 implements three different types of policy maps:
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Additionally, the Nexus 5000 introduces a new configuration context for QoS called the System QoS.
The policy-map applied under the System QoS context is applied to the entire switch.
The following table summarizes the function and attach points for these three types of policy maps.
OL-25300-01
Policy Maps
Improper Configurations
PFC
Registers and Counters
Define the class map.
Create a policy map to define the action taken for each class map.
Apply the policy-map.
Policy-map type qos
Policy-map type queuing
Policy-map type network-qos
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C H A P T E R
Cisco Nexus 5000 Series Troubleshooting Guide
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