Experiences Supporting By-Request Circuit-Switched T3 Networks (RFC1306)
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2019-Feb-11
Internet Society Requests For Comment (RFCs)
A. Nicholson: AUTHOR [+1]
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 RFC provides information for the Internet community. It does not specify an Internet standard.
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.
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.
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.
Nicholson & Young [Page 1]
RFC 1306 Experiences with Circuit-Switched T3 March 1992
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 is needed.
Consider how a researcher using a visualization application might efficiently use a dedicated low speed link and a circuit switched high speed link. The researcher logs in to the remote...