Cisco Catalyst 2950 Software Configuration Manual page 553

Chapter 29 Configuring QoS
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
Step 1
configure terminal
Step 2 access-list access-list-number {permit |
remark} {source source-wildcard | host
source | any}
Step 3 end
Step 4 show access-lists
Step 5
copy running-config startup-config
For more information about creating IP standard ACLs, see the
Physical Interfaces" section on page
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
78-11380-12
Purpose
Enter global configuration mode.
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.
Deny statements are not supported for QoS ACLs. See the
Note
"Classification Based on QoS ACLs" section on page 29-5
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).
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
28-6.
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Configuring Standard QoS
"Guidelines for Applying ACLs to
for
29-27