The Cisco AutoQoS feature is being used throughout the Company VOIP network. Which
three statements about this feature are true? (Select three)

A.
The “mls qos” global configuration command must be entered before configuring
AutoQoS.

B.
CEF must be enabled.

C.
The “no auto qos voip” command is used to disable Cisco AutoQos and revoke all
configurations generated by Cisco AutoQos.

D.
CDP must be enabled.

E.
SNMP must be enabled.

Explanation:
All of these answers can be found from the Cisco Auto QOS FAQ document found in the
reference link.
Portions of this document state:
Q) Does CEF need to be enabled for Cisco AutoQoS on routers?
A) Yes. Cisco AutoQoS uses Network Based Application Recognition (nBAR) to identify
various applications and traffic types; CEF is a prerequisite for NBAR.
Q) What are the minimum requirements for enabling Cisco AutoQoS on routers and switches?
A) Minimum requirements to enable Cisco AutoQoS for VoIP traffic on supported platforms
for WAN interfaces:
– Configure an IP address on the interface or a sub-interface.
– Configure “bandwidth” under any participating interfaces or sub-interfaces. For ATM PVC,
configure “vbr-nrt” under the PVC.
Minimum requirements to enable Cisco AutoQoS for VoIP traffic on supported LAN
interfaces for switch platforms:
– CDP must be enabled
Q) How do I disable Cisco AutoQoS? What configurations are deleted from router CLI when
Cisco AutoQoS is disabled?
A) Issue a “no auto qos voip” command under the interface or VC to disable Cisco AutoQoS.
All configurations generated by Cisco AutoQoS that have not been modified by the user will
be deleted when it is disabled on a particular interface.
Reference:
http://www.cisco.com/en/US/technologies/tk543/tk879/technologies_qas0900aecd8020a589. html