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

Configuring Marking

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About Marking

Marking is a method that you use to modify the QoS fields of the incoming and outgoing packets. The QoS
fields that you can mark are IP precedence and differentiated services code point (DSCP) in Layer 3. The QoS
group is a label local to the system to which you can assign intermediate marking values. You can use the
QoS group label to determine the egress scheduling.
You can use marking commands in traffic classes that are referenced in a policy map. The marking features
that you can configure are listed in the following table:
Table 27: Configurable Marking Features
Marking Feature
DSCP
IP precedence
About Marking, page 69
Licensing Requirements for Marking, page 71
Prerequisites for Marking, page 72
Guidelines and Limitations, page 72
Configuring Marking, page 73
Verifying the Marking Configuration, page 81
Configuration Examples for Marking, page 81
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
Layer 3 DSCP.
Layer 3 IP precedence.
IP precedence uses only the lower three bits
Note
of the type of service (ToS) field. The device
overwrites the first three bits of the ToS field
to 0.
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