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Network Time Protocol (NTP) over the OSI Remote Operations Service (RFC1165)

IP.com Disclosure Number: IPCOM000001977D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 8 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Crowcroft: AUTHOR [+2]

Abstract

This document describes the Remote Operations and Abstract Syntax for the operation of the Network Time Protocol (NTP) over an ISO OSI stack.

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

Network Working Group J. Crowcroft

Request for Comments: 1165 UCL

J. Onions

Nottingham University

June 1990

Network Time Protocol (NTP) over the OSI

Remote Operations Service

Status of this Memo

This memo suggests an Experimental Protocol for the OSI and Internet

communities. Hosts in either community, and in particular those on

both are encouraged to experiment with this mechanism. 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.

Table of Contents

1. Introduction........................................... 1

1.1 Motivation............................................ 1

2. Protocol Overview...................................... 2

3. Operation of the Protocol.............................. 3

4. Network Considerations................................. 4

5. Implementation Model................................... 4

6. Constructing NTP Data Fields........................... 4

7. Discussion............................................. 4

8. Prototype Experience................................... 5

9. References............................................. 5

10. Acknowledgements...................................... 6

Appendix A. NTP Remote Operations Service Specification... 6

11. Security Considerations............................... 9

12. Authors' Addresses.................................... 9

1. Introduction

This document describes the Remote Operations and Abstract Syntax for

the operation of the Network Time Protocol (NTP) over an ISO OSI

stack.

NTP itself is documented in great detail in RFC 1119.

1.1 Motivation

The motivation behind the implementation of a Remote Operations

Service implementation of NTP is fourfold.

1. The inclusion of a useful service to an OSI

environment.

2. The feasibility of automatically checking a ROS/ASN.1

specification, and automatically generating code to

implement the protocol.

3. The feasibility of running NTP on connection oriented

network services (CONS or X.25), and consequentially,

the ability to use connection success or failure to

optimise reachability discovery.

4. The generalisation of the last point: the use of ROS

makes NTP independent of the underlying communications

architecture.

The need for time synchronisation is clear, and RFC 1119 indicates a

few of the necessary uses of this service. However, it is becoming

clear that OSI applications are very much in need of this service

too. Not just in the loca...