Cisco Catalyst 2950 - Classifying Traffic by Using Acls; Classifying Traffic by Using Class Maps

13-14
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-03
Chapter 13 Configuring QoS
Configuring QoS
This section contains this configuration information:
• Classifying Traffic by Using ACLs, page 13-14
• Classifying Traffic by Using Class Maps, page 13-17
• Classifying, Policing, and Marking Traffic by Using Policy Maps, page 13-18
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:
To delete an ACL, use the no access-list access-list-number global configuration command.
This example shows how to allow access for only those hosts on the two specified networks. The
wildcard bits apply to the host portions of the network addresses. Any host with a source address that
does not match the ACL statements is rejected.
Switch(config)# access-list 1 permit 192.5.255.0 0.0.0.255
Switch(config)# access-list 1 permit 36.0.0.0 0.0.0.255
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
access-list access-list-number {deny |
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 theACL number. The range is 1 to 99 and
1300 to 1999.
Enter deny or permit to specify whether to deny or permit access if
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 applies wildcard bits to the source (see
first bullet item).
Note Deny statements are not supported for QoS ACLS. See the
“Classification Based on QoS ACLs” sectiononpage13-5for
more details.
Step 3
end Return to privileged EXEC mode.
Step 4
show access-lists Verify your entries.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.