RFC 1476 (rfc1476) - Page 1 of 20


RAP: Internet Route Access Protocol



Alternative Format: Original Text Document

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Network Working Group                                        R. Ullmann
Request for Comments: 1476                 Process Software Corporation
                                                              June 1993


                  RAP: Internet Route Access Protocol

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard.  Discussion and
   suggestions for improvement are requested.  Please refer to the
   current edition of the "IAB Official Protocol Standards" for the
   standardization state and status of this protocol.  Distribution of
   this memo is unlimited.

Abstract

   This RFC describes an open distance vector routing protocol for use
   at all levels of the internet, from isolated LANs to the major
   routers of an international commercial network provider.

Table of Contents

   1.       Introduction  . . . . . . . . . . . . . . . . . . . 2
   1.1       Link-State and Distance-Vector . . . . . . . . . . 3
   1.2       Terminology  . . . . . . . . . . . . . . . . . . . 3
   1.3       Philosophy . . . . . . . . . . . . . . . . . . . . 3
   2.       RAP Protocol  . . . . . . . . . . . . . . . . . . . 4
   2.1       Command Header Format  . . . . . . . . . . . . . . 4
   2.1.1     Length field . . . . . . . . . . . . . . . . . . . 4
   2.1.2     RAP version  . . . . . . . . . . . . . . . . . . . 5
   2.2       RAP Commands . . . . . . . . . . . . . . . . . . . 5
   2.2.1     No operation . . . . . . . . . . . . . . . . . . . 5
   2.2.2     Poll . . . . . . . . . . . . . . . . . . . . . . . 6
   2.2.3     Error  . . . . . . . . . . . . . . . . . . . . . . 7
   2.2.4     Add Route  . . . . . . . . . . . . . . . . . . . . 8
   2.2.5     Purge Route  . . . . . . . . . . . . . . . . . . . 9
   3.       Attributes of Routes  . . . . . . . . . . . . . . . 9
   3.1       Metric and Option Format . . . . . . . . . . . . .10
   3.1.1     Option Class . . . . . . . . . . . . . . . . . .  10
   3.1.2     Type . . . . . . . . . . . . . . . . . . . . . .  10
   3.1.3     Format . . . . . . . . . . . . . . . . . . . . .  11
   3.2       Metrics and Options  . . . . . . . . . . . . . .  11
   3.2.1     Distance . . . . . . . . . . . . . . . . . . . .  12
   3.2.2     Delay  . . . . . . . . . . . . . . . . . . . . .  12
   3.2.3     MTU  . . . . . . . . . . . . . . . . . . . . . .  12
   3.2.4     Bandwidth  . . . . . . . . . . . . . . . . . . .  12



Ullmann


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