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Guidelines for the use of Internet-IP addresses in the ISO Connectionless-Mode Network Protocol (RFC0986)

IP.com Disclosure Number: IPCOM000004984D
Original Publication Date: 1986-Jun-01
Included in the Prior Art Database: 2001-Jul-13
Document File: 8 page(s) / 14K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.W. Callon: AUTHOR [+2]

Abstract

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

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 42% of the total text.

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 Specific Part (DSP) of the address is based on binary. The AFI octet uses the value "47". The ISO-6523-ICD format is used to emphasize that this is an administrative assignment. The usage of an ISO DCC (Data Country Code) would be possible, but could be misleading due to the fairly far spread geographical extent of t...