Classifying traffic by using class maps – Dell POWEREDGE M1000E User Manual

Page 832

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36-46

Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide

OL-13270-03

Chapter 36 Configuring QoS

Configuring Standard QoS

Classifying Traffic by Using Class Maps

You use the class-map global configuration command to name and to isolate a specific traffic flow (or
class) from all other traffic. The class map defines the criteria to use to match against a specific traffic
flow to further classify it. Match statements can include criteria such as an ACL, IP precedence values,
or DSCP values. The match criterion is defined with one match statement entered within the class-map
configuration mode.

Note

You can also create class-maps during policy map creation by using the class policy-map configuration
command. For more information, see the

“Classifying, Policing, and Marking Traffic on Physical Ports

by Using Policy Maps” section on page 36-48

and the

“Classifying, Policing, and Marking Traffic on

SVIs by Using Hierarchical Policy Maps” section on page 36-52

.

Beginning in privileged EXEC mode, follow these steps to create a class map and to define the match
criterion to classify traffic:

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

access-list access-list-number {deny |
permit} source [source-wildcard]

or

access-list access-list-number {deny |
permit} protocol source
[source-wildcard] destination
[destination-wildcard]

or

mac access-list extended name

{permit | deny} {host src-MAC-addr mask
| any | host dst-MAC-addr | dst-MAC-addr
mask
} [type mask]

Create an IP standard or extended ACL for IP traffic or a Layer 2 MAC
ACL for non-IP traffic, repeating the command as many times as
necessary.

For more information, see the

“Classifying Traffic by Using ACLs”

section on page 36-43

.

Note

When creating an access list, remember that, by default, the
end of the access list contains an implicit deny statement for
everything if it did not find a match before reaching the end.

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