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

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.
Command
Step 1
configure terminal
Step 2
mls qos
Step 3
end
Step 4 show mls qos
Step 5 copy running-config startup-config
To disable QoS, use the no mls qos global configuration command.

Configuring Ingress Classification by Using Port Trust States

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
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Configuring the Trust State on Ports Within the QoS Domain

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
26-42
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
Purpose
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
page 26-76.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
26-48:
Figure 26-13 shows a sample network topology.
Chapter 26 Configuring QoS
"Default
and the
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