Using The Debug Auto Qos Command - Cisco Catalyst 2950 Software Configuration Manual

Chapter 31 Troubleshooting
Be aware that the debugging destination you use affects system overhead. Logging messages to the
Note
console produces very high overhead, whereas logging messages to a virtual terminal produces less
overhead. Logging messages to a syslog server produces even less, and logging to an internal buffer
produces the least overhead of any method.
For more information about system message logging, see
Logging."

Using the debug auto qos Command

You can use the debug auto qos privileged EXEC command to display quality of service (QoS)
commands that are automatically generated when automatic-QoS (auto-QoS) is enabled.
Beginning in privileged EXEC mode, follow these steps to display the QoS commands and enable
auto-QoS for voice over IP (VoIP) within a QoS domain:
Command
Step 1 debug auto qos
Step 2
configure terminal
Step 3 interface interface-id
Step 4 auto qos voip {cisco-phone | trust}
Step 5 end
Step 6
show auto qos interface interface-id
For more information about auto-QoS, see the
This example shows how to display the QoS commands that are automatically generated when auto-QoS
is enabled:
Switch# debug auto qos
AutoQoS debugging is on
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
78-11380-12
Purpose
Enable debugging for auto-QoS. When debugging is enabled, the
switch displays the QoS commands that are automatically generated
when auto-QoS is enabled or disabled.
Enter global configuration mode.
Specify the interface that is connected to a Cisco IP Phone, and enter
interface configuration mode. You also can specify the uplink interface
that is connected to another switch or router in the interior of the
network.
Enable auto-QoS.
The keywords have these meanings:
cisco-phone—If the interface is connected to a Cisco IP Phone,
•
the QoS labels of incoming packets are trusted only when the IP
phone is detected.
trust—The uplink interface is connected to a trusted switch or
•
router, and the VoIP classification in the ingress packet is trusted.
Return to privileged EXEC mode.
Verify your entries.
This command displays the auto-QoS configuration that was initially
applied; it does not display any user changes to the configuration that
might be in effect.
"Configuring Auto-QoS" section on page
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Using Debug Commands
Chapter 26, "Configuring System Message
29-10.
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