RFC 1223 (rfc1223) - Page 1 of 12

OSI CLNS and LLC1 protocols on Network Systems HYPERchannel

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Network Working Group                                         J. Halpern
Request for Comments: 1223                                           NSC
                                                                May 1991


      OSI CLNS and LLC1 Protocols on Network Systems HYPERchannel

Status of this Memo

   The intent of this document is to provide a complete discussion of
   the protocols and techniques used to transmit OSI CLNS and LLC1
   datagrams (and any associated higher level protocols) on Network
   Systems Corporation's HYPERchannel equipment.  This document is
   intended for network planners and implementers who are already
   familiar with the OSI protocol suite and the techniques used to carry
   OSI traffic on standard networks such as 802.3.

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Table of Contents

     Goals of this Document   . . . . . . . . . . . . . . . . . . . . . 1
     HYPERchannel Network Messages  . . . . . . . . . . . . . . . . . . 2
       Message Proper Header  . . . . . . . . . . . . . . . . . . . . . 3
       TO Addresses and Open Driver Architecture  . . . . . . . . . . . 8
     Broadcasting   . . . . . . . . . . . . . . . . . . . . . . . . . . 9
       ES-IS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
       IS-IS  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     References   . . . . . . . . . . . . . . . . . . . . . . . . . .  12
     Security Considerations  . . . . . . . . . . . . . . . . . . . .  12
     Author's Address . . . . . . . . . . . . . . . . . . . . . . . .  12

Goals of this Document

   In this document, we have three major technical objectives:

   1.  To standardize the encapsulation of LLC1 packets over
       HYPERchannel.  The format will be used for OSI CLNS and for
       any other protocols using LLC1 over HYPERchannel.  (Note
       that if one desires to use the LLC1/SNAP combination for
       TCP/IP, this is the format to use.  This represents an
       alternative to the native mode for TCP/IP over HYPERchannel,
       allowing for sharing the medium at the LLC1 layer.)






Halpern
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