Essential Tools for the OSI Internet
RFC 1574

Document Type RFC - Informational (February 1994; No errata)
Obsoletes RFC 1139
Last updated 2013-03-02
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Network Working Group                                           S. Hares
Request for Comments: 1574                                  Merit/NSFNET
Obsoletes: 1139                                             C. Wittbrodt
Category: Informational                      Stanford University/BARRNet
                                                           February 1994

                  Essential Tools for the OSI Internet

Status of this Memo

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

Abstract

   This document specifies the following three necessary tools to debug
   problems in the deployment and maintenance of networks using ISO 8473
   (CLNP):

      - ping or OSI Echo function
      - traceroute function which uses the OSI Echo function
      - routing table dump function

   These CLNS tools are the basics required for hosts and routers for
   CLNS network support. It is intended that this document specify the
   most basic support level required for CLNS hosts and routers.

   To support some of the needed tools (ping and traceroute) this memo
   specifies the mechanism specified in RFC 1575 [3].

Table of Contents

   Section 1. Conventions .......................................  2
   Section 2. Introduction ......................................  2
   Section 3. Specification .....................................  2
   Section 3.1 Ping .............................................  3
   Section 3.1.1 Protocol Support ...............................  3
   Section 3.1.2 Functions supported by the ping utility ........  3
   Section 3.2 Traceroute .......................................  3
   Section 3.2.1 Basic Traceroute ...............................  4
   Section 3.2.2 Use of Partial Source route in traceroute ......  5
   Section 3.2.3 Information needed from a Traceroute utility ...  6
   Section 3.3 OSI routing table dump ...........................  6
   Section 3.4 MIB variables available via SNMP .................  7
   Section 3.4.1 Summary of MIB Variables .......................  8
   Section 3.4.2 ASN.1 Syntax for these MIB variables ...........  8

Hares & Wittbrodt                                               [Page 1]
RFC 1574          Essential Tools for the OSI Internet     February 1994

   Section 4. OSI HOST.txt format ............................... 10
   Section 5. Acknowledgements .................................. 11
   Section 6. References ........................................ 12
   Section 7. Security Considerations ........................... 12
   Section 8. Author's Addresses ................................ 13

1.  Conventions

   The following language conventions are used in the items of
   specification in this document:

      o MUST, SHALL, or MANDATORY -- the item is an absolute
        requirement of the specification.

      o SHOULD or RECOMMENDED -- the item should generally be followed
        for all but exceptional circumstances.

      o MAY or OPTIONAL -- the item is truly optional and may be
        followed or ignored according to the needs of the implementor.

2.  Introduction

   Currently in the Internet, OSI protocols are being used more and
   more.  As the network managers of an Internet once predominantly a
   TCP/IP network began deploying parts of the emerging OSI Internet, it
   became apparent that network layer OSI network debugging tools were
   almost nonexistent.  When such tools existed, different
   implementations didn't work together.

   As stated in RFC 1575, a simple network layer mechanism is necessary
   to allow systems to be probed to test network layer integrity.  For
   the purposes of running OSI networks the authors of this document
   believe that other tools are necessary too.  Other tools described
   below are an echo function, a traceroute function, and a routing
   table dump.  What this document defines is the minimum subset of
   tools that are necessary to allow for the debugging of network
   problems.

3.  Specification

   This document's purpose is to specify a standard ping, traceroute,
   and OSI routing table dumping mechanisms for use for the ISO 8473
   (CLNP) protocol in the OSI Internet.  A detailed description of the
   specified mechanisms is below.  These mechanism MUST be available on
   every router (inter mediate system) or host (end system) that
   provides OSI service for the Internet.  These three functions are the
   basic tool set for the OSI network layer for the Internet.

Hares & Wittbrodt                                               [Page 2]
RFC 1574          Essential Tools for the OSI Internet     February 1994

3.1.  Ping

3.1.1.  Protocol Support

   The long term echo mechanism, as described in 1575, requires the use
   of two new type values in the packet header of the ISO 8473 Network
   Protocol Data Units (NPDUs), or preferably packets.  The two values
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