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29-19
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
Chapter 29 Configuring QoS
Configuring Standard QoS
Configuring Classification Using Port Trust States
This section describes how to classify incoming traffic by using port trust states:
• Configuring the Trust State on Ports within the QoS Domain, page 29-19
• Configuring the CoS Value for an Interface, page 29-20
• Configuring Trusted Boundary, page 29-21
• Enabling Pass-Through Mode, page 29-23
Note Both the SI and EI support this feature.
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 29-4
shows a sample network topology.
Figure 29-4 Port Trusted States within the QoS Domain
Beginning in privileged EXEC mode, follow these steps to configure the port to trust the classification
of the traffic that it receives:
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Trunk
Trusted interface
Traffic classification
performed here
Trusted boundary
IP
P1P3