Cisco Systems 2960 Manual De Usuario

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Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 33      Configuring QoS
Configuring Standard QoS
Enabling QoS Globally
By default, QoS is disabled on the switch. 
Beginning in privileged EXEC mode, follow these steps to enable QoS. This procedure is required.
To disable QoS, use the no mls qos global configuration command.
Configuring Classification Using Port Trust States
These sections describe how to classify incoming traffic by using port trust states. Depending on your 
network configuration, you must perform one or more of these tasks or one or more of the tasks in the 
:
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Configuring the Trust State on Ports within the QoS Domain
Note
Catalyst 2960-S switches do not support ingress queueing.
Packets entering a QoS domain are classified at the edge of the QoS domain. When the packets are 
classified at the edge, the switch port within the QoS domain can be configured to one of the trusted 
states because there is no need to classify the packets at every switch within the QoS domain. 
 shows a sample network topology.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
mls qos
Enable QoS globally.
QoS runs with the default settings described in the 
, th
, and the 
Step 3
end
Return to privileged EXEC mode.
Step 4
show mls qos
Verify your entries.
Step 5
copy running-config startup-config
(Optional) Save your entries in the configuration file.