Configuring Classification; About Classification - Cisco Nexus 9000 Series Configuration Manual

Configuring Classification

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About Classification

Classification is the separation of packets into traffic classes. You configure the device to take a specific action
on the specified classified traffic, such as policing or marking down, or other actions.
You can create class maps to represent each traffic class by matching packet characteristics with the
classification criteria in the following table:
Table 25: Classification Criteria
Classification Criteria
CoS
IP precedence
Differentiated Services Code Point (DSCP)
ACL
Packet length
IP RTP
You can specify multiple match criteria, you can choose to not match on a particular criterion, or you can
determine the traffic class by matching any or all criteria.
About Classification, on page 55
Prerequisites for Classification, on page 56
Guidelines and Limitations, on page 56
Configuring Traffic Classes, on page 58
Verifying the Classification Configuration, on page 71
Configuration Examples for Classification, on page 71
Cisco Nexus 9000 Series NX-OS Quality of Service Configuration Guide, Release 7.x
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C H A P T E R
Description
Class of service (CoS) field in the IEEE 802.1Q
header.
Precedence value within the type of service (ToS)
byte of the IP header.
DSCP value within the DiffServ field of the IP header.
IP, IPv6, or MAC ACL name.
Size range of Layer 3 packet lengths.
Identify applications using Real-time Transport
Protocol (RTP) by UDP port number range.
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