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Replication and Distributed Operations extensions to provide an Internet Directory using X.500 (RFC1276)

IP.com Disclosure Number: IPCOM000002095D
Original Publication Date: 1991-Nov-01
Included in the Prior Art Database: 2001-Oct-24
Document File: 18 page(s) / 34K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S.E. Hardcastle-Kille: AUTHOR

Abstract

Some requirements on extensions to X.500 are described in the RFC[HK91b], in order to build an Internet Directory using X.500(1988). This document specifies a set of solutions to the problems raised. These solutions are based on some work done for the QUIPU implementation, and demonstrated to be effective in a number of directory pilots. By documenting a de facto standard, rapid progress can be made towards a full-scale pilot. These procedures are an INTERIM approach. There are known deficiencies, both in terms of manageability and scalability. Transition to standard approaches are planned when appropriate standards are available. This RFCwill be obsoleted at this point. (Download file contains alternative document format.)

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 11% of the total text.

Network Working Group                            S.E. Hardcastle-Kille

Requests for Comments 1276                   University College London

                                                         November 1991

          Replication and Distributed Operations extensions

             to provide an Internet Directory using X.500

Status of this Memo

    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.

Abstract

    Some requirements on extensions to X.500 are described in the

    RFC[HK91b], in order to build an Internet Directory using

    X.500(1988).  This document specifies a set of solutions to the

    problems raised.  These solutions are based on some work done for

    the QUIPU implementation, and demonstrated to be effective in a

    number of directory pilots.  By documenting a de facto standard,

    rapid progress can be made towards a full-scale pilot.  These

    procedures are an INTERIM approach.  There are known

    deficiencies, both in terms of manageability and scalability.

    Transition to standard approaches are planned when appropriate

    standards are available.  This RFCwill be obsoleted at this

    point.

RFC 1276         Internet Directory Replication          November 1991

Contents

1   Approach                                                         2

2   Extensions to Distributed Operations                             3

3   Alternative DSAs                                                 4

4   Data Model                                                       5

5   DSA Naming                                                       6

6   Knowledge Representation                                         6

7   Replication Protocol                                             9

8   New Application Context                                         12

9   Policy on Replication Procedures                                12

10  Use of the Directory by Applications                            12

11  Migration and Scaling                                           12

12  Security Considerations                                         13

13  Author's Address                                                13

A   ASN.1 Summary and Object Identifier Allocation                  14

List of Figures

    1      Knowledge Attributes  .   .   .   .   .   .   .   .       8

    2      Replication Protocol  .   .   .   .   .   .   .   .      10

    3      Summary of the ASN.1  .   .   .   .   .   .   .   .      17

Hardcastle-Kille                                                Page 1

RFC 1276         Internet Directory Replication          November 1991

1  Approach

There are a number of non-negotiable requirements which must be met

before a directory can be deployed on the Internet [HK91b].  These

problems are being tackled in the standards arena, but there is

currently no stable solution.  One approach would be to attempt to

intercept the standard.  Difficulties with this would be:

 o  Defining a coherent intercept would be awkward, and the effort

    would probably be better devoted to working on the standard.  It

    is not even clear that such an intercept could be defined.

 o  The target is moving, and it is always tempting to track it, thus

    causing more delay.

 o  There would be a delay involved with this approach.  It would be

    too late to be useful for a rapid start, and sufficiently close to

    the timing of the final standard that many would choose not to

    implement it.

Therefore, we choose to take a simple approach.  This is a good deal

simpler than the full X.500 approach, and is based on operational

experience.  The advantages of this approach are:

 o  It is proven in operation.  This RFCis simply documenting what is

    being done alr...