DELL N3000 User Manual

Configuring Auto VoIP

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Configuring Auto VoIP

Voice over Internet Protocol (VoIP) allows you to make telephone calls using a

computer network over a data network like the Internet. With the increased

prominence of delay-sensitive applications (voice, video, and other

multimedia applications) deployed in networks today, proper QoS

configuration will ensure high-quality application performance. The Auto

VoIP feature is intended to provide an easy classification mechanism for voice

packets so that they can be prioritized above data packets in order to provide

better QoS. Because Auto VoIP is limited to 16 sessions, Voice VLAN is the

preferred solution for enterprises wishing to deploy a large scale voice service.
The topics covered in this chapter include:

Auto VoIP Overview

The Auto VoIP feature explicitly matches VoIP streams in Ethernet switches

and provides them with a better class of service than ordinary traffic. If you

enable the Auto VoIP feature on an interface, the interface scans incoming

traffic for the following call-control protocols:

• Session Initiation Protocol (SIP)
• H.323
• Skinny Client Control Protocol (SCCP)

When a call-control protocol is detected the switch assigns the traffic in that

session to the highest CoS queue, which is generally used for time-sensitive

traffic.