I-D ACTION:draft-ietf-rmt-gra-arch-00.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 Reliable Multicast Transport Working Group of the IETF.

	Title		: Generic Router Assist (GRA) Building Block    
                          Motivation and Architecture
	Author(s)	:  B. Cain, T. Speakman, D. Towsley
	Filename	: draft-ietf-rmt-gra-arch-00.txt
	Pages		: 19
	Date		: 28-Oct-99
	
Generic Router Assist (GRA) is a network-based service that enables
end-to-end multicast transport protocols to take advantage of infor-
mation distributed across the network elements in a given multicast
distribution tree.  The service consists of a canonical set of simple
functions which network elements may apply to selected packets in the
transport session as they traverse the distribution tree.  The choice
of function and the packet parameters to which it is applied can be
defined and customized for a given transport session in a highly con-
trolled fashion that still permits enough flexibility for GRA to be
used to address a wide range of multicast transport problems not
amenable to end-to-end solution.  This document provides the motiva-
tion and an architecture for GRA.

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