RFC 2336 (rfc2336) - Page 1 of 5

Classical IP to NHRP Transition

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Network Working Group                                         J. Luciani
Request for Comments: 2336                                  Bay Networks
Category: Informational                                        July 1998




            Classical IP and ARP over ATM to NHRP Transition


Status of this Memo

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

Copyright Notice

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

Abstract

   This document describes methods and procedures for the graceful
   transition from an ATMARP LIS[1] to an NHRP LIS[2] network model over
   ATM.

1. Introduction

   The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,
   SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL, when they appear in this
   document, are to be interpreted as described in [6].

   ATMARP defines an initial application of classical IP and ARP in an
   ATM network environment configured as a LIS[1].  ATMARP only
   considers application of ATM as a direct replacement for the "wires"
   and local LAN segments connecting IP end-stations and routers
   operating in the "classical" LAN-based paradigm.

   The NBMA Next Hop Resolution Protocol (NHRP) allows a source station
   (a host or router), wishing to communicate over a Non-Broadcast,
   Multi-Access (NBMA) subnetwork, to determine the internetworking
   layer addresses and NBMA addresses of suitable "NBMA next hops"
   toward a destination station. If the destination is connected to the
   NBMA subnetwork and direct communication is administratively allowed,
   then the NBMA next hop is the destination station itself.  Otherwise,
   the NBMA next hop is the egress router from the NBMA subnetwork that
   is "nearest" to the destination station.  For the purposes of this
   document, the NBMA network is of type ATM.



Luciani                      Informational
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