Cisco Systems 3560 Manual De Usuario

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.

Before configuring auto-QoS, you should be aware of this information:

In releases earlier than Cisco IOS Release 12.2(20)SE, auto-QoS configures VoIP only on switch 
ports with Cisco IP Phones.

In Cisco IOS Release 12.2(20)SE or later, 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.

When a device running Cisco SoftPhone is connected to a nonrouted or routed port, the 
switch supports only one Cisco SoftPhone application per port.

If you entered the auto qos voip cisco-phone command, the 
switch automatically creates class maps and policy maps.

witch(config)# mls qos map policed-dscp 24 26 46 to 

Switch(config)# class-map match-all 

Switch(config-cmap)# match ip dscp ef

Switch(config)# class-map match-all 

Switch(config-cmap)# match ip dscp cs3 af31

Switch(config)# policy-map AutoQoS-Police-CiscoPhone

Switch(config-pmap)# class AutoQoS-VoIP-RTP-Trust

Switch(config-pmap-c)# set dscp ef

Switch(config-pmap-c)# police 320000 8000 

Switch(config-pmap)# class 

Switch(config-pmap-c)# set dscp cs3

Switch(config-pmap-c)# police 32000 8000 

After creating the class maps and policy maps, the switch 
automatically applies the policy map named 
AutoQoS-Police-CiscoPhone to an ingress interface on which 
auto-QoS with the Cisco Phone feature is enabled.

Switch(config-if)# service-policy input