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25-16
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-05
Chapter 25 Configuring QoS
Configuring QoS
Configuring a QoS Policy
Note This feature is available only if your switch is running the EI.
Configuring a QoS policy typically requires classifying traffic into classes, configuring policies applied
to those traffic classes, and attaching policies to interfaces.
For background information, see the “Classification” section on page 25-4 and the “Policing and
Marking” section on page 25-6.
This section contains this configuration information:
• Classifying Traffic by Using ACLs, page 25-16
• Classifying Traffic by Using Class Maps, page 25-20
• Classifying, Policing, and Marking Traffic by Using Policy Maps, page 25-21
Classifying Traffic by Using ACLs
You can classify IP traffic by using IP standard or IP extended ACLs; you can classify Layer 2 traffic by
using Layer 2 MAC ACLs.
Beginning in privileged EXEC mode, follow these steps to create an IP standard ACL for IP traffic:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
access-list access-list-number {permit |
remark} {source source-wildcard | host
source | any}
Create an IP standard ACL, repeating the command as many times as
necessary.
For access-list-number, enter the ACL number. The range is 1 to 99 and
1300 to 1999.
Enter permit to specify whether to permit access if conditions are
matched.
Enter remark to specify an ACL entry comment up to 100 characters.
Note Deny statements are not supported for QoS ACLs. See the
“Classification Based on QoS ACLs” section on page 25-5 for
more details.
The source is the source address of the network or host from which the
packet is being sent, specified in one of three ways:
• The 32-bit quantity in dotted decimal format.
• The keyword any as an abbreviation for source and
source-wildcard of 0.0.0.0 255.255.255.255. You do not need to
enter a source wildcard.
• The keyword host as an abbreviation for source and
source-wildcard of source 0.0.0.0.
(Optional) The source-wildcard variable applies wildcard bits to the
source (see first bullet item).