Cisco Systems 3560 Manual De Usuario

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 

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.

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Trunk

Trusted interface

Traffic classification
performed here

Trusted boundary

P1

P3