RFC 1629 (rfc1629) - Page 2 of 52

Guidelines for OSI NSAP Allocation in the Internet

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