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ARPANET AHIP-E Host Access Protocol (enhanced AHIP) (RFC1005)

IP.com Disclosure Number: IPCOM000001808D
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 34 page(s) / 40K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Khanna: AUTHOR [+1]

Related Documents

10.17487/RFC1005: DOI

Abstract

This RFC is a proposed specification for the encoding of Class A IP addresses for use on ARPANET-style networks such as the Milnet and Arpanet, and for enhancements to the ARPANET AHIP Host Access Protocol (AHIP; formerly known as 1822). These enhancements increase the size of the PSN field, allow ARPANET hosts to use logical names to address each other, allow for the communication of type-of-service information from the host to the PSN and enable the PSN to provide congestion feedback to the host on a connection basis.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group Atul Khanna, Andy Malis Request for Comments: 1005 BBN Communications Corp. May 1987

The ARPANET AHIP-E Host Access Protocol (Enhanced AHIP)

1. Status of this Memo

This RFC is a proposed specification for the encoding of Class A IP addresses for use on ARPANET-style networks such as the Milnet and Arpanet, and for enhancements to the ARPANET AHIP Host Access Protocol (AHIP; formerly known as 1822). These enhancements increase the size of the PSN field, allow ARPANET hosts to use logical names to address each other, allow for the communication of type-of-service information from the host to the PSN and enable the PSN to provide congestion feedback to the host on a connection basis. Distribution of this memo is unlimited. Comments on this RFC should be sent to the netmail address "ahipe@bbn.com".

Khanna & Malis [Page 1]

RFC 1005 May 1987

Table of Contents

1 INTRODUCTION.......................................... 4

2 IP ISSUES............................................. 6 2.1 Current Interpretation of Class A IP Address Fields ................................................... 6 2.2 Requirements and Constraints Affecting New Class A Mapping ................................................... 7 2.3 New Interpretation of IP Address Fields............. 8 2.4 Discussion of the New Mapping.......................10 2.5 Interoperability between Current AHIP and AHIP-E ...................................................11

3 LOGICAL ADDRESSING................................... 13 3.1 Addresses and Names................................ 13 3.2 Name Translations.................................. 14 3.2.1 Authorization and Effectiveness.................. 15 3.2.2 Translation Policies............................. 16 3.2.3 Reporting Destination Host Downs................. 17 3.3 Establishing Host-PSN Communications............... 18 3.4 Name Server........................................ 19

4 OTHER CHANGES........................................ 20 4.1 Type-of-Service Specification...................... 20 4.2 Subnet Congestion Feedback......................... 21 4.3 Precedence Level Information....................... 21

5 FORMATS FOR NEW AHIP-E MESSAGES...................... 23 5.1 Host-to-PSN AHIP-E Leader Format................... 23 5.2 PSN-to-Host AHIP-E Leader Format................... 27

6 AHIP-E VERSIONS...................................... 33

7 REFERENCES........................................... 34

Khanna & Malis [Page 2]

RFC 1005 May 1987

FIGURES

2.1 IP Class A Mapping................................... 6 2.2 New Class A IP Address Interpretation................ 8 2.3 AHIP-E Address and Name.............................. 9 3.1 Current AHIP Address Format......................... 13 3.2 AHIP-E Address Format............................... 14 3.3 Logical Name Format................................. 14 5.1 Host-to-PSN AHIP-E Leader Format.................... 23 5.2 NDM Message Format.................................. 25 5.3 P...

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