I-D ACTION:draft-nalawade-kapoor-tunnel-safi-03.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.

	Title		: Tunnel SAFI
	Author(s)	: G. Nalawade, et al.
	Filename	: draft-nalawade-kapoor-tunnel-safi-03.txt
	Pages		: 13
	Date		: 2005-7-21

The architecture of an MPLS VPN solution relies on the establishment
   of two layers of reachability information.  The first is the
   association of a prefix, interface, or route table to a VPNv4 label
   that is used on the egress PE to delineate a Virtual Route Forwarding
   table.  The second is the association of the next-hop to reach the
   egress PE.  By default, the MPLS VPN establishes an LSP tunnel from
   the ingress PE to the egress PE.  A requirement exists to establish
   an IP tunnel between the ingress and egress PE in lieu of an LSP.
   The egress PE's tunnel capability needs to be distributed to all the
   potential ingress PE's as well as the attributes of the tunnel.  The
   tunnel end-point discovery may occur within and across Autonomous
   Systems.  BGP is the logical protocol of choice that is widely
   deployed for MPLS VPN solutions and can carry this information in a
   synchronized manner. This document defines how BGP speakers can
   convey Tunnel end-point reachability information.

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