Class-Default Class; Restrictions And Limitations For Traffic Classification; Classifying Traffic Using A Class Map - Cisco 10000 Series Configuration Manual

Chapter 2 Classifying Traffic
match qos-group
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match vlan
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Class-Default Class

The class named class-default is a predefined traffic class that the router uses to classify traffic that does
match one of the defined classes in a policy map. Although class-default is predefined, you can configure
policy actions for it in the policy map. If you do not configure policy actions, by default the router
classifies class-default traffic as first in, first out (FIFO) and gives the traffic best-effort treatment.
For more information on policy actions, see

Restrictions and Limitations for Traffic Classification

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Classifying Traffic Using a Class Map

To classify traffic using a class map, perform the following tasks:
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OL-7433-09
Use this command to identify a specific QoS group number marking on a packet. You can also use
this command to convey the received MPLS experimental (EXP) field value to the output interface.
The router only uses the QoS group number as an identifying mark. The QoS group numbers have
no mathematical significance. For example, qos-group 2 is not greater than 1. The value simply
indicates that a packet marked with qos-group 2 is different than a packet marked with qos-group 1.
You define the treatment of these packets by defining QoS policies in a policy map.
The QoS group number is local to the router. The QoS group number that is marked on a packet does
not leave the router when the packet leaves the router. To mark the packet with a value that resides
in the packet, use an IP precedence setting, an IP DSCP setting, or another method of packet
marking.
Do not use this command with any other match command in a class map.
Each class map can have a maximum of 16 match statements.
The Cisco 10000 series router does not have a predefined scaling limit for classification.
A policy map with a traffic class based on the match fr-de command can be applied only on an
inbound Frame Relay interface.
Creating a Class Map, page 2-12
Verifying Traffic Classification, page 2-13
Defining QoS Policy Actions, page 2-13
(See Chapter 3, "Configuring QoS Policy Actions and
Restrictions and Limitations for Traffic Classification
Chapter 3, "Configuring QoS Policy Actions and Rules."
(required)
(optional)
(required)
Rules.")
Cisco 10000 Series Router Quality of Service Configuration Guide
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