OSI CLNS and LLC1 protocols on Network Systems HYPERchannel (RFC1223)

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J.M. Halpern: AUTHOR

Abstract

Status of this Memo

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.)

2. To describe how multicast protocols such as ES-IS and IS-IS shall

operate over HYPERchannel. As a medium, HYPERchannel does not

support either broadcast or multicast. Therefore, special

techniques are needed to handle these protocols. Note that these

techniques do not allow general multicast, although any specific

problem may be solved by a generalization of these methods.

3. To make use of a standardized "message type" field in bytes

8 and...