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Chapter 37
Configuring QoS
Auto-QoS VoIP Considerations
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Auto-QoS Enhanced Considerations
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Enabling Auto-QoS
For optimum QoS performance, enable auto-QoS on all the devices in your network.
Beginning in privileged EXEC mode, follow these steps to enable auto-QoS devices within a QoS
domain:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
auto qos voip {cisco-phone |
cisco-softphone | trust}
or
OL-13270-06
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.
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.
The auto qos srnd4 global configuration command is generated as a result of enhanced auto-QoS
configuration.
If the legacy auto qos voip commands are executed on the switch and the mls qos command is
disabled, the enhanced auto-QoS configuration is generated. Otherwise, legacy auto-QoS commands
are executed.
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
Purpose
Enter global configuration mode.
Specify the port that is connected to a video device or the uplink port
that is connected to another trusted switch or router in the network
interior, and enter interface configuration mode.
Enable auto-QoS.
cisco-phone—If the port is connected to a Cisco IP Phone, the
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QoS labels of incoming packets are trusted only when the
telephone is detected.
cisco-softphone—The port is connected to device running the
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Cisco SoftPhone feature.
trust—The uplink port is connected to a trusted switch or router,
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and the VoIP traffic classification in the ingress packet is trusted.
Configuring Auto-QoS
37-33
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