RFC 1005 (rfc1005) - Page 2 of 34

ARPANET AHIP-E Host Access Protocol (enhanced AHIP)

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












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