The Routing Over Large Clouds Mailing List Archive by date

[Dave Katz <dkatz@cisco.com>]

This draft has been submitted as an Internet Draft.

The differences between this draft and the previous one are:
	Minor wordsmithing and clarification
	Address Type expanded to 16 bits to match RFC1700
	Address Type expanded to 16 bits to match RFC1700
	Definition of the Authentication Option
	Definition of the Authentication Option
	Addition of the Vendor-Private Option
	Addition of the Vendor-Private Option
	A few more words in Security Considerations
	A few more words in Security Considerations

--- cut here ---






Routing over Large Clouds Working Group                        Dave Katz
INTERNET-DRAFT                                           (cisco Systems)
INTERNET-DRAFT                                           (cisco Systems)
<draft-ietf-rolc-nhrp-03.txt>                           David Piscitello
                                                 (Core Competence, Inc.)
                                                       November 29, 1994


                NBMA Next Hop Resolution Protocol (NHRP)
                NBMA Next Hop Resolution Protocol (NHRP)


Status of this Memo

   This document is an Internet Draft.  Internet Drafts are working
   documents of the Internet Engineering Task Force (IETF), its Areas,
   documents of the Internet Engineering Task Force (IETF), its Areas,
   and its Working Groups.  Note that other groups may also distribute
   working documents as Internet Drafts.

   Internet Drafts are draft documents valid for a maximum of six
   months.  Internet Drafts may be updated, replaced, or obsoleted by
   other documents at any time.  It is not appropriate to use Internet
   Drafts as reference material or to cite them other than as a "working
   draft" or "work in progress."

   Please check the I-D abstract listing contained in each Internet
   Draft directory to learn the current status of this or any Internet
   Draft.

Abstract
Abstract

   This document describes the NBMA Next Hop Resolution Protocol (NHRP).
   This document describes the NBMA Next Hop Resolution Protocol (NHRP).
   NHRP can be used by a source station (host or router) connected to a
   Non-Broadcast, Multi-Access (NBMA) network to determine the IP and
   Non-Broadcast, Multi-Access (NBMA) network to determine the IP and
   NBMA network addresses of the "NBMA next hop" towards a destination
   NBMA network addresses of the "NBMA next hop" towards a destination
   station.  If the destination is connected to the NBMA network, then
   station.  If the destination is connected to the NBMA network, then
   the NBMA next hop is the destination station itself.  Otherwise, the
   the NBMA next hop is the destination station itself.  Otherwise, the
   NBMA next hop is the egress router from the NBMA network that is
   NBMA next hop is the egress router from the NBMA network that is
   "nearest" to the destination station.  Although this document focuses
   "nearest" to the destination station.  Although this document focuses
   on NHRP in the context of IP, the technique is applicable to other
   network layer protocols (e.g., IPX, CLNP, Appletalk) as well.
   network layer protocols (e.g., IPX, CLNP, Appletalk) as well.

   This document is intended to be a functional superset of the NBMA
   This document is intended to be a functional superset of the NBMA
   Address Resolution Protocol (NARP) documented in [1].
   Address Resolution Protocol (NARP) documented in [1].


1. Introduction

   The NBMA Next Hop Resolution Protocol (NHRP) allows a source station
   The NBMA Next Hop Resolution Protocol (NHRP) allows a source station
   (a host or router), wishing to communicate over a Non-Broadcast,



Katz, Piscitello            Expires May 1995                    [Page 1]

INTERNET-DRAFT                 NBMA NHRP               November 29, 1994
INTERNET-DRAFT                 NBMA NHRP               November 29, 1994


   Multi-Access (NBMA) network, to determine the IP and NBMA addresses
   Multi-Access (NBMA) network, to determine the IP and NBMA addresses
   of the "NBMA next hop" toward a destination station.  A network can
   of the "NBMA next hop" toward a destination station.  A network can
   be non-broadcast either because it technically doesn't support
   broadcasting (e.g., an X.25 network) or because broadcasting is not
   feasible for one reason or another (e.g., an SMDS multicast group or
   an extended Ethernet would be too large).  If the destination is
   connected to the NBMA network, then the NBMA next hop is the
   connected to the NBMA network, then the NBMA next hop is the
   destination station itself