Quality Of Service; Information About Quality Of Service; Qos Configuration Limits - Cisco Nexus 1000V 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 1 k - d o c f e e d b a c k @ c i s c o . c o m .

Quality of Service

This chapter describes how to identify and resolve problems related to Quality of Service (QoS).
This chapter includes the following sections:
• Information About Quality of Service, page 16-1
• QoS Configuration Limits, page 16-1
• QoS Troubleshooting Commands, page 16-2
Troubleshooting the VEM, page 16-2
•
Debugging Policing Verification Errors, page 16-3
•

Information About Quality of Service

QoS lets you classify network traffic so that it can be policed and prioritized in a way that prevents
congestion. Traffic is processed based on how you classify it and the QoS policies that you put in place.
Classification, marking, and policing are the three main features of QoS.
Traffic Classification—Groups network traffic based on defined criteria.
•
Traffic Marking—Modifies traffic attributes such as DSCP, COS, and Precedence by class.
•
Policing —Monitors data rates and burst sizes for a particular class of traffic. QoS policing on a
•
network determines whether network traffic is within a specified profile (contract).
For detailed information about QoS, refer to the Cisco Nexus 1000V Quality of Service Configuration
Guide, Release 4.2(1)SV2(1.1).

QoS Configuration Limits

Table 16-1
Table 16-1
Item
Class map
Policy map
Service policy
OL-28795-01
land Table 16-2 list the configuration limits for QoS.
QoS Configuration Limits
DVS Limit
1000
128
–
C H A P T E R
Cisco Nexus 1000V Troubleshooting Guide, Release 4.2(1)SV2(2.1)
16
Per Server Limit
64 (with policies)
16
128
16-1