RFC 2067 (rfc2067) - Page 2 of 30

IP over HIPPI

RFC 2067                     IP over HIPPI                  January 1997


      5.4   Rules For Connections.............................. 13
      5.5   MTU................................................ 15
   6  Camp-on ................................................. 16
   7  Path MTU Discovery....................................... 17
   8  Channel Data Rate Discovery.............................. 17
   9  Performance.............................................. 18
   10 Sharing the Switch....................................... 20
   11 References............................................... 21
   12 Security Considerations.................................. 21
   13 Author's Address......................................... 21
   14 Appendix A -- HIPPI Basics............................... 22
   15 Appendix B -- How to Build a Practical HIPPI LAN......... 27

1  Introduction

   The ANSI High-Performance Parallel Interface (HIPPI) is a simplex
   data channel.  Configured in pairs, HIPPI can send and receive data
   simultaneously at nearly 800 megabits per second.  (HIPPI has an
   equally applicable 1600 megabit/second option.) Between 1987 and
   1991, the ANSI X3T9.3 HIPPI working group drafted four documents that
   bear on the use of HIPPI as a network interface.  They cover the
   physical and electrical specification (HIPPI-PH [1]), the framing of
   a stream of bytes (HIPPI-FP [2]), encapsulation of IEEE 802.2 LLC
   (HIPPI-LE [3]), and the behavior of a standard physical layer switch
   (HIPPI-SC [4]).  HIPPI-LE also implies the encapsulation of Internet
   Protocol[5].  The reader should be familiar with the ANSI HIPPI
   documents, copies of which are archived at the site "ftp.network.com"
   in the directory "hippi", and may be obtained via anonymous FTP.

   HIPPI switches can be used to connect a variety of computers and
   peripheral equipment for many purposes, but the working group stopped
   short of describing their use as Local Area Networks.  This memo
   takes up where the working group left off, using the guiding
   principle that except for length and hardware header, Internet
   datagrams sent on HIPPI should be identical to the same datagrams
   sent on a conventional network, and that any datagram sent on a
   conventional 802 network[6] should be valid on HIPPI.














Renwick                     Standards Track