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Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBMBladeCenter, Software Configuration Guide
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Chapter23 Co nfiguring QoS
Configuring Auto-QoS
•By default, the CDP is enabled on all interfaces. For auto-QoS to function properly, do not disable
the CDP.
•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:
To disable auto-QoS on the switch and return to the default port trust state set (untrusted), follow these
steps:
1. Use the no auto qos voip interface configuration command on all interfaces on which auto-QoS is
enabled. To disable auto-QoS on multiple interfaces at the same time, you can use the interface
range global configuration command.
2. After disabling auto-QoS on all interfaces on which auto-QoS was enabled, return the egress queues
and CoS-to-DSCP map to the default settings by using these global configuration commands:
•no wrr-queue bandwidth
•no wrr-queue cos-map
•no mls qos map cos-dscp
To display the QoS commands that are automatically generated when auto-QoS is enabled or disabled,
enter the debug auto qos privileged EXEC command before enabling auto-QoS. For more inform ation,
see the “Using the debug auto qos Command” section on page 25-12.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the interface that is conne cted to a Cisco IP Phone, and enter
interface configuration mode. You also can specify the uplink interface
that is connected to another trusted witch or router in the interior of the
network.
Step3 auto qos voip {cisco-phone | trust} 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.
Step4 end Return to privileged EXEC mode.
Step5 show auto qos interface interface-id Verify your entries.
This command displays the auto-QoS command on the interface on
which auto-QoS was enabled. You can use the show running-config
privileged EXEC command to display the auto-QoS configuration and
the user modifications.