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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 39 Configuring QoS
Configuring Standard QoS
Beginning in privileged EXEC mode, follow these steps to enable QoS. This procedure is required.
To disable QoS, use the no ml
s qos global configuration command.
Enabling VLAN-Based QoS on Physical Ports
By default, VLAN-based QoS is disabled on all physical switch ports. The switch applies QoS, including
class maps and policy maps, only on a physical-port basis. In Cisco IOS Release 12.2(25)SE or later,
yYou can enable VLAN-based QoS on a switch port.
Beginning in privileged EXEC mode, follow these steps to enable V
LAN-based QoS. This procedure is
required on physical ports that are specified in the interface level of a hierarchical policy map on an SVI.
Use the no mls qos vlan-based interf
ace configuration command to disable VLAN-based QoS on the
physical port.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
mls qos Enable QoS globally.
QoS runs with the default settings described in the “
Default Standard QoS
Configuration” section on page 39-34, the “Queueing and Scheduling on
Ingress Queues” section on page 39-16, and the “Queueing and Scheduling
on Egress Queues” section on page 39-19.
Step 3
end Return to privileged EXEC mode.
Step 4
show mls qos Verify the QoS configuration.
Step 5
copy running-config
startup-config
(Optional) Save your entries in the configuration file.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Specify the physical port, and enter interface configuration mode.
Step 3
mls qos vlan-based Enable VLAN-based QoS on the port.
Step 4
end Return to privileged EXEC mode.
Step 5
show mls qos interface interface-id Verify if VLAN-based QoS is enabled on the physical port.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.