The Proposed DARPA IP-to-X.25 Interface Standard: Performance Optimization with Multiple Circuits
Douglas E. Comer, John T. Korb · Purdue e-Pubs (Purdue University System) · 1983
The Defense Advanced Research Projects Agency recently proposed guidelines for interfacing the Department of Defense Internet Protocol (IP) to public packet-switched networks that use the CCITT X.25 protocol.Thi9 paper briefly reviews the problem, and gives the details of an implementation that adheres to the guidelines.It describes experiments with the interface software that isolated a serious bottleneck, and shows how performance can be improved dramatically by multiplexing traffic over multiple virtual circuits.Finally, it describes a model of the underlying network that can be used to accurately predict saturation, a point at which increasing the number of virtual circuits increases the cost without increasing throughput.