Effects Of Auto-Qos On The Configuration; Auto-Qos Configuration Guidelines - Cisco WS-C3020 Software Configuration Manual

Chapter 32 Configuring QoS
Table 32-5 Generated Auto-QoS Configuration (continued)
Description
If you entered the auto qos voip cisco-softphone command,
the switch automatically creates class maps and policy maps.
After creating the class maps and policy maps, the switch
automatically applies the policy map called
AutoQoS-Police-SoftPhone to an ingress interface on which
auto-QoS with the Cisco SoftPhone feature is enabled.

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:
•
•
OL-8915-03
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
Note
switch supports only one Cisco SoftPhone application per port.
Beginning with Cisco IOS Release 12.2(44)SE, Auto-Qos VoIP uses the priority-queue interface
configuration command for an egress interface. You can also configure a policy-map and trust device
on the same interface for Cisco IP phones.
Automatically Generated Command
Switch(config)# mls qos map policed-dscp 24 26 46 to
0
Switch(config)# class-map match-all
AutoQoS-VoIP-RTP-Trust
Switch(config-cmap)# match ip dscp ef
Switch(config)# class-map match-all
AutoQoS-VoIP-Control-Trust
Switch(config-cmap)# match ip dscp cs3 af31
Switch(config)# policy-map AutoQoS-Police-SoftPhone
Switch(config-pmap)# class AutoQoS-VoIP-RTP-Trust
Switch(config-pmap-c)# set dscp ef
Switch(config-pmap-c)# police 320000 8000
exceed-action policed-dscp-transmit
Switch(config-pmap)# class
AutoQoS-VoIP-Control-Trust
Switch(config-pmap-c)# set dscp cs3
Switch(config-pmap-c)# police 32000 8000
exceed-action policed-dscp-transmit
Switch(config-if)# service-policy input
AutoQoS-Police-SoftPhone
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
Configuring Auto-QoS
32-25