Cisco Gigabit Ethernet Switch Module for HP p-Class BladeSystem Software Configuration Guide

27-35

380261-003

Chapter 27 Configuring QoS

Configuring Standard QoS

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

“Configuring a QoS Policy” section on page 27-41:

• Configuring the Trust State on Ports within the QoS Domain, page 27-35

• Configuring the CoS Value for an Interface, page 27-37

• Configuring a Trusted Boundary to Ensure Port Security, page 27-37

• Enabling DSCP Transparency Mode, page 27-39

• Configuring the DSCP Trust State on a Port Bordering Another QoS Domain, page 27-39

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 27-12 shows a sample network topology.

Figure 27-12 Port Trusted States within the QoS Domain

101236

Trunk

Trusted interface

Traffic classification

performed here

Trusted boundary

P1P3