Browse Prior Art Database

Experiences Supporting By-Request Circuit-Switched T3 Networks (RFC1306)

IP.com Disclosure Number: IPCOM000002126D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 9 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Nicholson: AUTHOR [+2]

Abstract

This memo describes the experiences of a project team at Cray Research, Inc., in implementing support for circuit-switched T3 services. While the issues discussed may not be directly relevant to the research problems of the Internet, they may be interesting to a number of researchers and implementers.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 12% of the total text.

Network Working Group A. Nicholson

Request for Comments: 1306 J. Young

Cray Research, Inc.

March 1992

Experiences Supporting By-Request Circuit-Switched T3 Networks

Status of this Memo

This RFC provides information for the Internet community. It does

not specify an Internet standard. Distribution of this memo is

unlimited.

Abstract

This memo describes the experiences of a project team at Cray

Research, Inc., in implementing support for circuit-switched T3

services. While the issues discussed may not be directly relevant to

the research problems of the Internet, they may be interesting to a

number of researchers and implementers.

Developers at Cray Research, Inc. were presented with an opportunity

to use a circuit-switched T3 network for wide area networking. They

devised an architectural model for using this new resource. This

involves activating the circuit-switched connection when an

application program engages in a bulk data transfer, and releasing

the connection when the transfer is complete.

Three software implementations for this feature have been tested, and

the results documented here. A variety of issues are involved, and

further research is necessary. Network users are beginning to

recognize the value of this service, and are planning to make use of

by-request circuit-switched networks. A standard method of access

will be needed to ensure interoperability among vendors of circuit-

switched network support products.

Acknowledgements

The authors thank the T3 project team and other members of the

Networking Group at Cray Research, Inc., for their efforts: Wayne

Roiger, Gary Klesk, Joe Golio, John Renwick, Dave Borman and Craig

Alesso.

Overview

Users of wide-area networks often must make a compromise between low

cost and high speed when accessing long haul connections. The high

money cost of dedicated high speed connections makes them

uneconomical for scientists and engineers with limited budgets. For

many traditional applications this has not been a problem. Datasets

can be maintained on the remote computer and results were presented

in a text-only form where a low-speed connection would suffice.

However, for visualization and other data transfer intensive

applications, this limitation can severely impact the usability of

high performance computing tools which are available only through

long-haul network connections.

Supercomputers are one such high performance tool. Many users who

can benefit from access to supercomputers are limited by slow network

connections to a centrally located supercomputer. A solution to this

problem is to use a circuit-switched network to provide high speed

network connectivity at a reduced cost by allocating the network only

when it ...