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OSI connectionless transport services on top of UDP: Version 1 (RFC1240)

IP.com Disclosure Number: IPCOM000002056D
Original Publication Date: 1991-Jun-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 7 page(s) / 17K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Shue: AUTHOR [+3]

Abstract

Status of this Memo

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 18% of the total text.

Network Working Group C. Shue

Request for Comments: 1240 Open Software Foundation

W. Haggerty

Wang Laboratories, Inc.

K. Dobbins

Cabletron Systems, Inc.

June 1991

OSI Connectionless Transport Services on top of UDP

Version: 1

Status of this Memo

This document describes a protocol for running OSI Connectionless

service on UDP. This RFC specifies an IAB standards track protocol

for the Internet community, and requests discussion and suggestions

for improvements. Please refer to the current edition of the "IAB

Official Protocol Standards" for the standardization state and status

of this protocol. Distribution of this memo is unlimited.

1. Introduction and Philosophy

The Internet community has a well-developed, mature set of layered

transport and network protocols, which are quite successful in

offering both connection-oriented (TCP) and connectionless (UDP)

transport services over connectionless network services (IP) to end-

users. Many popular network applications have been built directly on

top of the TCP and UDP over the past decade. These have helped the

Internet services and protocols to become widely-spread de facto

standards. In the past few years, the ISO and CCITT have defined a

well-architected set of upper layer standards which include

connection-oriented and connectionless session, presentation, and

application layer services and protocols. These OSI upper layer

standards offer valuable services to application developers (e.g.,

dialogue control, transfer syntax, peer authentication, directory

services, etc.) which are not currently offered by the TCP/IP

standards.

As indicated in RFC 1006, it is desirable to offer the OSI upper

layer services directly in the Internet without disrupting existing

facilities. This permits a more graceful convergence and transition

strategy from IP-based networks to OSI-based networks in the future.

Using the approach of RFC 1006, this memo specifies how to offer OSI

connectionless transport service using the User Datagram Protocol

(UDP) [RFC768] of the TCP/IP suite.

We will define a Transport Service Access Point (TSAP) which appears

to be identical to the services and interfaces defined in ISO 8072

and its Addendum 1, but we will in fact implement the ISO T-UNIT-DATA

protocol on top of UDP. By this means, OSI TPDU's can be delivered

across the Internet network, and OSI connectionless upper layers can

operate fully without knowledge of the fact that they are running on

top of UDP/IP. In essence, the OSI T-UNIT-DATA service will use UDP

as its connectionl...