Specifications

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Catalyst 2970 Switch Software Configuration Guide
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Chapter 27 Configuring QoS
Configuring Standard QoS
Configuring the Trust State on Ports within the QoS Domain
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.
Figure 27-11 shows a sample network topology.
Figure 27-11 Port Trusted States within the QoS Domain
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Catalyst
3750 switch
Trunk
Trusted interface
Classification
of traffic
performed here
Catalyst 2970
wiring closet
Trusted boundary
IP
P1P3