Specifications

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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 27 Configuring QoS
Displaying Auto-QoS Information
To display the QoS commands that are automatically generated when auto-QoS is enabled or disabled,
enter the debug autoqos privileged EXEC command before enabling auto-QoS. For more information,
see the “Using the debug autoqos Command” section on page 29-16.
To disable auto-QoS on an interface, use the no auto qos voip interface configuration command. When
you enter this command, the switch changes the auto-QoS settings to the standard-QoS default settings
for that interface.
To disable auto-QoS on the switch, use the no auto qos voip interface configuration command on all
interfaces on which auto-QoS is enabled. When you enter this command on the last interface on which
auto-QoS is enabled, the switch enables pass-through mode.
This example shows how to enable auto-QoS and to trust the QoS labels in incoming packets when the
device connected to Fast Ethernet interface 0/1 is detected as a Cisco IP Phone:
Switch(config)# interface fastethernet0/1
Switch(config-if)# auto qos voip cisco-phone
This example shows how to enable auto-QoS and to trust the QoS labels in incoming packets when the
switch or router connected to Gigabit Ethernet interface 0/1 is a trusted device:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# auto qos voip trust
Displaying Auto-QoS Information
To display the inital auto-QoS configuration, use the show auto qos [interface [interface-id]] privileged
EXEC command. To display any user changes to that configuration, use the show running-config
privileged EXEC command. You can compare the show auto qos and the show running-config
command output to identify the user-defined QoS settings.
To display information about the QoS configuration that might be affected by auto-QoS, use one of these
commands:
• show mls qos
• show mls qos map cos-dscp
• show wrr-queue bandwidth
• show wrr-queue cos-map
For more information about these commands, refer to the command reference for this release.