[AG-TECH] IP Multicast Architecture Gap Analysis

[Bill Nickless]

I have submitted an Internet Draft to the IETF based on the strategic 
direction adopted at the IETF MBONED meeting in Yokohama.  It is now posted 
in the IETF I-D repository.

ftp://ftp.ietf.org/internet-drafts/draft-ietf-mboned-iesg-gap-analysis-00.txt

Excerpts:

    Internet Draft                                  Editors:    D. Meyer
                                                                  Sprint
    Document:                                                B. Nickless
    draft-ietf-mboned-iesg-gap-analysis-00.txt          Argonne National
                                                              Laboratory
    Expires:                                                   July 2002
    January 2003


                       Internet Multicast Gap Analysis
                        from the MBONED Working Group
                                for the IESG


2. Abstract

    An overview of IP multicast as deployed in the Internet today, from
    the perspective of the MBONED working group.  Existing
    infrastructure is examined critically.  Suggestions for possible
    improvement of the overall architecture are presented for the IESG.


3. Table of Contents

    1. Status of this Memo.............................................1
    2. Abstract........................................................1
    4. Overview and Background.........................................2
    5. Conventions used in this document...............................2
    6. RFC 1112........................................................3
    7. Source-Specific Multicast.......................................3
    8. Host Extensions for IP Multicast................................3
    9. Mapping of Multicast Group Addresses to Ethernet MAC Addresses..4
    10. Local Subnet Receiver Interest Protocol (IGMP).................4
    11. Collision-Sense Media Access Sender Model......................4
    12. Multicast Gateways.............................................5
    13. Dense Mode Internet Multicast Routing..........................5
    14. Reachability Protocol Independent Multicast Routing............6
    15. Sparse Mode Internet Multicast Routing.........................7
    16. Mixed Dense/Sparse Mode Internet Multicast Routing.............7
    17. Bursty Sources vs. Sparse Mode Forwarding State Maintenance....8
    18. Co-mingled Source Knowledge and Packet Forwarding..............8
    19. Co-mingled IP and Ethernet Routing.............................9
    20. Inter-Domain IP Multicast Exchange Points......................9
    21. IP Multicast Architectural Gaps...............................11
    22. Recommendations from MBONED to IESG...........................11
    23. Acknowledgements..............................................13
    24. Security Considerations.......................................13
    25. References....................................................14
    26. Editors' Addresses............................................14

4. Overview and Background

    At the IETF-54 meeting, the MBONED working group recommended that
    the MSDP working group publish their current work as an
    Informational RFC and shut down.  Some participants in the MBONED
    and MSDP working groups believed that the recurring discussions
    about the operation of MSDP were proxy arguments about the IP
    Multicast service model, and how that model can be supported in the
    Internet.  Participants came to rough consensus that the best place
    for these overall service model and deployment questions is the
    MBONED working group.

    A two phase approach was adopted.  The short-term objective is to
    document existing MSDP implementations and deployments.  A longer-
    term objective for the MBONED working group is to perform a "gap
    analysis" of the existing IP multicast service model, protocols, and
    deployment.

    This document represents that ôgap analysis,ö and is intended as
    advice to IESG.  The MBONED participants hope the IESG will consider
    this advice in the context of IESG guidance for further IP multicast
    protocol development and deployment work.


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Bill Nickless    http://www.mcs.anl.gov/people/nickless      +1 630 252 7390
PGP:0E 0F 16 80 C5 B1 69 52 E1 44 1A A5 0E 1B 74 F7     nickless at mcs.anl.gov