Classifying Egress Traffic By Using Class Maps - Cisco Catalyst 3750 Software Configuration Manual

Metro switch

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Table of Contents

Configuring Hierarchical QoS

Classifying Egress Traffic by Using Class Maps

You use the class-map global configuration command to create a class map for matching packets to the

class whose name you specify. The class map isolates a specific outbound traffic flow (class) from all

other traffic by defining the criteria to use to match against a specific flow. The match criterion is defined

with a match statement entered within the class-map configuration mode. Packets are checked against

the match criteria configured for a class map. If a packet matches the specified criteria, the packet is

considered a member of the class and is forwarded according to the QoS specifications set in the traffic

Beginning in privileged EXEC mode, follow these steps to create a class-level class-map and to define

the match criterion to classify outbound traffic. This procedure is required. The examples that follow the

procedure show how to create a class-level and a VLAN-level class-map.

configure terminal

class-map [match-all | match-any]

class-map-name

Catalyst 3750 Metro Switch Software Configuration Guide

Configuring CBWFQ and Tail Drop, page 26-86

Configuring CBWFQ and DSCP-Based WRED, page 26-89

Configuring CBWFQ and IP Precedence-Based WRED, page 26-93

Enabling LLQ, page 26-97

Configuring Shaping, page 26-99

Enter global configuration mode.

Create a class map, and enter class-map configuration mode.

By default, no class maps are defined.

(Optional) Use the match-all keyword to perform a logical-AND

of all matching statements under this class map. All criteria in the

class map must be matched.

(Optional) Use the match-any keyword to perform a logical-OR

of all matching statements under this class map. One or more

criteria must be matched.

For class-map-name, specify the name of the class map.

If neither the match-all nor the match-any keyword is specified, the

default is match-all. You must use the match-all keyword if you are

matching an 802.1Q tunneling pair (instead of matching a single

Configuring QoS