RFC 2225 (rfc2225) - Page 1 of 28

Classical IP and ARP over ATM

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Network Working Group                                        M. Laubach
Request for Comments: 2225                                  Com21, Inc.
Category: Standards Track                                    J. Halpern
Obsoletes: 1626, 1577                          Newbridge Networks, Inc.
                                                             April 1998


                     Classical IP and ARP over ATM

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Table of Contents

   1. ABSTRACT  . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2. ACKNOWLEDGMENT  . . . . . . . . . . . . . . . . . . . . . . .  2
   3. CONVENTIONS . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4. INTRODUCTION  . . . . . . . . . . . . . . . . . . . . . . . .  3
   5. IP SUBNETWORK CONFIGURATION . . . . . . . . . . . . . . . . .  6
   5.1  Background  . . . . . . . . . . . . . . . . . . . . . . . .  6
   5.2  LIS Configuration Requirements  . . . . . . . . . . . . . .  7
   5.3  LIS Router Additional Configuration . . . . . . . . . . . .  8
   6. IP PACKET FORMAT  . . . . . . . . . . . . . . . . . . . . . .  8
   7. DEFAULT VALUE FOR IP MTU OVER ATM AAL5  . . . . . . . . . . .  9
   7.1  Permanent Virtual Circuits  . . . . . . . . . . . . . . . .  9
   7.2  Switched Virtual Circuits . . . . . . . . . . . . . . . . .  9
   7.3  Path MTU Discovery Required . . . . . . . . . . . . . . . . 11
   8. LIS ADDRESS RESOLUTION SERVICES . . . . . . . . . . . . . . . 11
   8.1  ATM-based ARP and InARP Equivalent Services . . . . . . . . 11
   8.2  Permanent Virtual Connections . . . . . . . . . . . . . . . 12
   8.3  Switched Virtual Connections  . . . . . . . . . . . . . . . 12
   8.4  ATMARP Single Server Operational Requirements . . . . . . . 13
   8.5  ATMARP Client Operational Requirements  . . . . . . . . . . 14
   8.5.1  Client ATMARP Table Aging . . . . . . . . . . . . . . . . 16
   8.5.2  Non-Normal VC Operations  . . . . . . . . . . . . . . . . 17
   8.5.3  Use of ATM ARP in Mobile-IP Scenarios . . . . . . . . . . 17
   8.6  Address Resolution Server Selection . . . . . . . . . . . . 17
   8.6.1  PVCs to ATMARP Servers  . . . . . . . . . . . . . . . . . 18
   8.7  ATMARP Packet Formats . . . . . . . . . . . . . . . . . . . 18



Laubach & Halpern           Standards Track
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