I-D ACTION:draft-ietf-ion-r2r-nhrp-01.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Internetworking Over NBMA Working Group of the IETF.

	Title		: NHRP for Destinations off the NBMA Subnetwork
	Author(s)	: Y. Rekhter, J. Halpern
	Filename	: draft-ietf-ion-r2r-nhrp-01.txt
	Pages		: 13
	Date		: 24-Feb-99
	
   The NBMA Next Hop Resolution Protocol (NHRP) [1] specifies a
   mechanism that allows a source station (e.g., a host or a router) on
   an NBMA subnetwork to find the NBMA subnetwork address address of a
   destination station when the destination station is connected to the
   NBMA subnetwork. For the case where the destination station is off
   the NBMA subnetwork the mechanism described in [1] allows to
   determine the NBMA subnetwork address of an egress router from the
   NBMA subnetwork that is ``nearest'' to the destination station.  If
   used to locate an egress router wherein the destination station is
   directly behind the egress router, the currently document NHRP
   behaviors are sufficient.  However, as documented elsewhere [2],
   there are cases where if used between routers for generalized
   transit, NHRP can produce loops.
 
   This document describes extensions to the NBMA Next Hop Resolution
   Protocol (NHRP) [1] that allow to acquire and maintain the
   information about the egress router without constraining the
   destination(s) to be directly connected to the egress router.

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