Guidelines for OSI NSAP Allocation in the Internet
RFC 1629

Document Type RFC - Draft Standard (May 1994; No errata)
Obsoletes RFC 1237
Last updated 2013-03-02
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Network Working Group                                          R. Colella
Request for Comments: 1629                                           NIST
Obsoletes: 1237                                                 R. Callon
Category: Standards Track                                       Wellfleet
                                                               E. Gardner
                                                                    Mitre
                                                               Y. Rekhter
                                   T.J. Watson Research Center, IBM Corp.
                                                                 May 1994

           Guidelines for OSI NSAP Allocation in the Internet

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   CLNP is currently being deployed in the Internet.  This is useful to
   support OSI and DECnet(tm) traffic.  In addition, CLNP has been
   proposed as a possible IPng candidate, to provide a long-term
   solution to IP address exhaustion.  Required as part of the CLNP
   infrastructure are guidelines for network service access point (NSAP)
   address assignment.  This paper provides guidelines for allocating
   NSAP addresses in the Internet.

   The guidelines provided in this paper have been the basis for initial
   deployment of CLNP in the Internet, and have proven very valuable
   both as an aid to scaling of CLNP routing, and for address
   administration.

Colella, Callon, Gardner & Rekhter                              [Page 1]
RFC 1629                    NSAP Guidelines                     May 1994

Table of Contents

   Section 1. Introduction ...............................    4
   Section 2. Scope ......................................    5
   Section 3. Background .................................    7
   Section 3.1 OSI Routing Standards .....................    7
   Section 3.2 Overview of IS-IS (ISO/IEC 10589) .........    8
   Section 3.3 Overview of IDRP (ISO/IEC 10747) ..........   12
   Section 3.3.1 Scaling Mechanisms in IDRP ..............   14
   Section 3.4 Requirements of IS-IS and IDRP on NSAPs ...   15
   Section 4. NSAPs and Routing ..........................   16
   Section 4.1 Routing Data Abstraction ..................   16
   Section 4.2 NSAP Administration and Efficiency ........   19
   Section 5. NSAP Administration and Routing in the In-
        ternet ...........................................   21
   Section 5.1 Administration at the Area ................   23
   Section 5.2 Administration at the Subscriber Routing
        Domain ...........................................   24
   Section 5.3 Administration at the  Provider  Routing
        Domain ...........................................   24
   Section 5.3.1 Direct Service Providers ................   25
   Section 5.3.2 Indirect Providers ......................   26
   Section 5.4 Multi-homed Routing Domains ...............   26
   Section 5.5 Private Links .............................   31
   Section 5.6 Zero-Homed Routing Domains ................   33
   Section 5.7 Address Transition Issues .................   33
   Section 6. Recommendations ............................   36
   Section 6.1 Recommendations Specific to U.S. Parts of
        the Internet .....................................   37
   Section 6.2  Recommendations Specific to European Parts
        of the Internet ..................................   39
   Section 6.2.1 General NSAP Structure ..................   40
   Section 6.2.2 Structure of the Country Domain Part ....   40
   Section  6.2.3  Structure of the Country Domain
        Specific Part ....................................   41
   Section 6.3 Recommendations Specific to Other Parts of
        the Internet .....................................   41
   Section 6.4 Recommendations for Multi-Homed Routing
        Domains ..........................................   41
   Section 6.5 Recommendations for RDI and RDCI assign-
        ment .............................................   42
   Section 7. Security Considerations ....................   42
   Section 8. Authors' Addresses .........................   43
   Section 9. Acknowledgments ............................   43
   Section 10. References ................................   44
   Section A. Administration of NSAPs ....................   46
   Section A.1  GOSIP Version 2 NSAPs ....................   47
   Section A.1.1  Application for Administrative Authority

Colella, Callon, Gardner & Rekhter                              [Page 2]
RFC 1629                    NSAP Guidelines                     May 1994

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