Using the AT&T Labs PacketScope for Internet Measurement, Design, and Performance Analysis

This note describes the AT&T Labs PacketScope, a high performance system for packet-level Internet measurement, which we have developed with the help of a great many others in AT&T World- net sm and AT&T Networking and Computer Systems. The NYC PacketScope, operational in June 1997, harvests about 10M packet headers per day on links between AT&T Worldnet sm and the external Internet. The Bridgeton, Missouri PacketScope, deployed in July 1997, can monitor a variety of traffic from the dial platform, web hosting and other servers, as well as gateway links to the external Internet. The data has a wide range of applications to AT&T Worldnet sm marketing, engineering, and service provisioning. One application is described here: to the design and performance tuning of the IP over ATM infrastruc- ture for AT&T's ATM common backbone, which will provide the network platform for AT&T World- net sm . Finally, we offer some remarks on ongoing simulation and analytic work.