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Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
OL-8915-03
Chapter 32 Configuring QoS
Configuring Auto-QoS
•
If the switch port was
configured by using the
auto qos voip cisco-phone
interface configuration
command in
Cisco IOS Release 12.2(40)SE or earlier, the auto-QoS generated commands new to
Cisco IOS Release 12.2(40)SE are not applied to the port. To have these commands automatically
applied, you must remove and then reapply the configuration to the 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 32-25
.
•
After auto-QoS is enabled, do not modify a policy map or aggregate policer that includes
AutoQoS
in its name. If you need to modify the policy map or aggregate 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.
Enabling Auto-QoS for VoIP
Beginning in privileged EXEC mode, follow these steps to enable auto-QoS for VoIP within a QoS
domain:
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface
interface-id
Specify the port that is connected to a Cisco IP Phone, the port that is
connected to a device running the Cisco SoftPhone feature, or the
uplink port that is connected to another trusted switch or router in the
interior of the network, and enter interface configuration mode.
Step 3
auto qos voip
{
cisco-phone
|
cisco-softphone
|
trust
}
Enable auto-QoS.
The keywords have these meanings:
•
cisco-phone
—If the port is connected to a Cisco IP Phone, the
QoS labels of incoming packets are trusted only when the
telephone is detected.
•
cisco-softphone
—The port is connected to device running the
Cisco SoftPhone feature.
•
trust
—The uplink port is connected to a trusted switch or router,
and the VoIP traffic classification in the ingress packet is trusted.
