Enabling Qos Globally; Configuring Ingress Classification By Using Port Trust States; Configuring The Trust State On Ports Within The Qos Domain; Configuring The Cos Value For An Interface - Cisco Catalyst 3750 Software Configuration Manual

Metro switch

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Table of Contents

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.

configure terminal

show mls qos

copy running-config startup-config

To disable QoS, use the no mls qos global configuration command.

These sections describe how to classify inbound traffic through 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 an Ingress QoS Policy" section on page

Packets entering a QoS domain are classified at the edge of the QoS domain. The switch port within the

QoS domain can then be configured to one of the trusted states because there is no need to classify the

packets at every switch within the domain.

Catalyst 3750 Metro Switch Software Configuration Guide

Configuring the Trust State on Ports Within the QoS Domain, page 26-42

Configuring the CoS Value for an Interface, page 26-45

Configuring a Trusted Boundary to Ensure Port Security, page 26-46

Configuring the DSCP Trust State on a Port Bordering Another QoS Domain, page 26-47

Enter global configuration mode.

Enable QoS globally.

QoS runs from the default settings described in the

Standard QoS Configuration" section on page 26-38

"Default Hierarchical QoS Configuration" section on

Return to privileged EXEC mode.

Verify your entries.

(Optional) Save your entries in the configuration file.

Figure 26-13

shows a sample network topology.

Configuring QoS