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Catalyst 2960 Switch SoftwareConfiguration Guide
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Chapter29 Co nfiguring QoS
Configuring Auto-QoS
Effects of Auto-QoS on the Configuration
When auto-QoS is enabled, the auto qos voip interface configuration command and the generated
configuration are added to the running configuration.
The switch applies the auto-QoS-generated commands as if the commands were entered from the CLI.
An existing user configuration can cause the application of the generated commands to fail or to be
overridden by the generated commands. These actions occur without warning. If all the generated
commands are successfully applied, any user-entered configuration that was not overridden remains in
the running configuration. Any user-entered configuration that was overridden can be retrieved by
reloading the switch without saving the current configuration to memory. If the generated commands fail
to be applied, the previous running configuration is restored.
Auto-QoS Configuration Guidelines
Before configuring auto-QoS, you should be aware of this information:
•Auto-QoS configures the switch for VoIP with Cisco IP Phones on nonrouted and routed ports.
Auto-QoS also configures the switch for VoIP with devices running the Cisco SoftPhone
application.
Note When a device running Cisco SoftPhone is connected to a nonrouted or routed port, the
switch supports only one Cisco SoftPhone application per port.
•To take advantage of the auto-QoS defaults, you should enable auto-QoS before you configure other
QoS commands. If necessary, you can fine-tune the QoS configuration, but we recommend that you
do so only after the auto-QoS configuration is completed. For more information, see the “Effects of
Auto-QoS on the Configuration” section on page 29-24.
•After auto-QoS is enabled, do not modify a policy map o r aggregate policer that includes AutoQoS
in its name. If you need to modify the policy map or aggr egate policer, make a copy of it, and change
the copied policy map or policer. To use this new policy map instead of the generated one, remove
the generated policy map from the interface, and apply the new policy map to the interface.
•You can enable auto-QoS on static, dynamic-access, voice VLAN access, and trunk ports.
•By default, the CDP is enabled on all ports. For auto-QoS to function properly, do not disable the
CDP.
•When enabling auto-QoS with a Cisco IP Phone on a routed port, you must assign a static IP address
to the IP phone.
•This release supports only Cisco IP SoftPhone Version 1.3(3) or later.
•Connected devices must use Cisco Call Manager Version 4 or later.