Configuring Cisco AVVID
Introduces Cisco s converged media services technology, and the hardware and software required to make it work.
TABLE OF CONTENTS Configuring Cisco AVVID
Chapter 7: Design Considerations in a WAN/Campus Environment
Introduction
Designing a solid infrastructure plan is the foundation of any network. Other considerations come into play when specifically designing an AVVID network solution. Traffic Engineering, QoS, traffic prioritization, maximizing bandwidth efficiency, and a scalable dial plan are just some of the issues involved in designing an AVVID voice architecture. A sufficient network capacity is required to handle voice traffic on a converged network. In this chapter, we will discuss traffic engineering principles and some of the considerations involved in designing a scalable AVVID infrastructure. Lastly, we will cover some of the requirements in designing an enterprise dial plan.
Traffic Engineering Principles for Packet Voice Networks
Whether it s Voice-over IP (VoIP), Voice-over Frame Relay, Voice-over ATM, or Voice-over HDLC, traffic engineering is a major issue that needs to be examined quite closely before an IP telephony or Voice-over network can be implemented. Traffic engineering refers to the process of determining the required trunk capacity that will meet the projected call volumes within a telephony network. In a circuit-switched network, the number of trunks required equates to the number of DS0 facilities that are required in the WAN. For a Voice-over data network, the required number of trunks must then be multiplied by the amount of bandwidth that will be required per call. This result will then be used to determine the total amount of bandwidth required for WAN facilities to support both voice and data on the same network. There are essentially two approaches to determine the maximum...
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