Guidelines for the use of Internet-IP addresses in the ISO Connectionless-Mode Network Protocol
RFC 986

Document Type RFC - Unknown (June 1986; No errata)
Obsoleted by RFC 1069
Last updated 2013-03-02
Stream Legacy
Formats plain text pdf html bibtex
Stream Legacy state (None)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state RFC 986 (Unknown)
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                  Ross Callon (BBN)
Request for Comments: 986                      Hans-Werner Braun (UMich)
                                                               June 1986

                             WORKING DRAFT

         Guidelines for the use of Internet-IP addresses in the
                ISO Connectionless-Mode Network Protocol

Status of This Memo

   This RFC suggests a method to allow the existing IP addressing,
   including the IP protocol field, to be used for the ISO
   Connectionless Network Protocol (CLNP).  This is a draft solution to
   one of the problems inherent in the use of "ISO-grams" in the DOD
   Internet.  Related issues will be discussed in subsequent RFCs.  This
   RFC suggests a proposed protocol for the ARPA-Internet community, and
   requests discussion and suggestions for improvements.  Distribution
   of this memo is unlimited.

1.  Introduction

   The CLNP is documented in [1], but for matters of completeness the
   following illustration of the CLNP header is included here as
   Figure 1.

   The addressing part of the header is the subject of this RFC, i.e.,
   the source and the destination address, respectively.  These
   addresses are generally discussed in [2] and [3], with this document
   presenting a specific method for addressing in the DOD Internetwork
   environment, consistent with the international standardized NSAP
   addresses.

Callon & Braun                                                  [Page 1]



RFC 986                                                        June 1986
DOD IP Addresses in ISO CLNP

                                            Octet                     
  +--------------------------------------+                   +--------
  |  Network Layer Protocol Identifier   |  1                :        
  |--------------------------------------|                   :        
  |           Length Indicator           |  2                :        
  |--------------------------------------|                   :        
  |   Version/Protocol Id Extension      |  3                :   Fixed
  |--------------------------------------|                   :        
  |              Lifetime                |  4                :    Part
  |--------------------------------------|                   :        
  |SP|MS|E/R|      Type                  |  5                :        
  |--------------------------------------|                   :        
  |           Segment Length             |  6,7              :        
  |--------------------------------------|                   :        
  |              Checksum                |  8,9              :        
  |--------------------------------------|                   +--------
  | Destination Address Length Indicator |  10               :        
  |--------------------------------------|                   :        
  |         Destination Address          |  11 through m-1   : Address
  |--------------------------------------|                   :        
  |    Source Address Length Indicator   |  m                :    Part
  |--------------------------------------|                   :        
  |            Source Address            |  m+1 through n-1  :        
  |--------------------------------------|                   +--------
  |         Data Unit Identifier         |  n,n+1            :        
  |--------------------------------------|                   : Segment
  |            Segment Offset            |  n+2,n+3          :   ation
  |--------------------------------------|                   :        
  |             Total Length             |  n+4,n+5          :    Part
  |--------------------------------------|                   +--------
  |                Options               |  n+6 through p    : Options
                                                                  Part
  |--------------------------------------|                   +--------
  |                 Data                 |  p+1 through z    :    Data
  +--------------------------------------+                   +--------

                     Figure 1:   PDU Header Format

Callon & Braun                                                  [Page 2]



RFC 986                                                        June 1986
DOD IP Addresses in ISO CLNP

2.  Addresses for Use in the Internet

   This section describes the primary addresses used to address NSAPs in
   the Internet.  A later section will describe a separate address
   format for end systems and individual simple LANs that are attached
   to the Internet only through intervening Public Data Networks.

   The appropriate Authority and Format Identifier (AFI) is one octet in
   length.

      "The AFI consists of an integer with a value between 0 and 99 with
      an abstract syntax of two decimal digits" [3], that is, the AFI
      codes are binary coded decimal (BCD).

   It specifies an ISO-6523-ICD assignment, and also that the Domain
Show full document text