RFC 5058 on Explicit Multicast (Xcast) Concepts and Options

A new Request for Comments is now available in online RFC libraries.

        RFC 5058

        Title:      Explicit Multicast (Xcast) Concepts and 
                    Options 
        Author:     R. Boivie, N. Feldman,
                    Y. Imai, W. Livens,
                    D. Ooms
        Status:     Experimental
        Date:       November 2007
        Mailbox:    rhboivie@us.ibm.com, 
                    nkfeldman@yahoo.com, 
                    ug@xcast.jp,  wim@livens.net, 
                    dirk@onesparrow.com
        Pages:      35
        Characters: 80072
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ooms-xcast-basic-spec-13.txt

        URL:        http://www.rfc-editor.org/rfc/rfc5058.txt

While traditional IP multicast schemes (RFC 1112) are scalable for very
large multicast groups, they have scalability issues with a very
large number of distinct multicast groups.  This document describes
Xcast (Explicit Multi-unicast), a new multicast scheme with
complementary scaling properties: Xcast supports a very large number
of small multicast sessions.  Xcast achieves this by explicitly
encoding the list of destinations in the data packets, instead of
using a multicast group address.

This document discusses Xcast concepts and options in several areas;
it does not provide a complete technical specification.  This memo defines 
an Experimental Protocol for the Internet community.

EXPERIMENTAL: This memo defines an Experimental Protocol for the Internet 
community. It does not specify an Internet standard of any kind. Discussion
and suggestions for improvement are requested.  Distribution of this memo 
is unlimited.

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