Performance measurements of multimedia transmissions in IP over ATM networks.

摘要

We have built an ATM testbed comprised of two ATM edge switches (Newbridge MainStreet 36150), and two Pentium III workstations connected to the ATM network via Ethernet cards. We used the MBone and NetMeeting multimedia conferencing systems to measure and evaluate the performance of audio and video transmissions in an IP over ATM network. Using Spirent's SmartBits 600 load generator, and in compliance with RFC 2544, we measured and analyzed throughput and packet delay as the main parameters for measuring forwarding performance and quality of service in multimedia applications.;The ATM Traffic Monitor tool, a simple network management graphical user interface written in Tcl, Tk, and Expect scripting languages, provided an easy graphical capture of the aggregate traffic sent through Ethernet cards of the ATM switches. (Abstract shortened by UMI.)