rfc2887.txt

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   reliable multicast within the context of one-to-many bulk-data
   transfer. Other flavors of multicast application are not considered
   in this document, and hence the overview given should not be
   considered inclusive of the design space for protocols that fall
   outside the context of one-to-many bulk-data transfer. During the
   course of this overview, we have reaffirmed the notion that the
   process of reliable multicast protocol design is affected by a number
   of factors that render the generation of a "one size fits all
   solution" moot. These factors are then described to show how an
   application's needs serve to constrain the set of available
   techniques that may be used to create a reliable multicast protocol.
   We examined a number of basic techniques and to show how well they
   can meet the needs of certain types of applications.

   This document is intended to provide guidance to the IETF community
   regarding the standardization of reliable multicast protocols for
   bulk-data transfer. Given the degree to which application
   requirements constrain reliable multicast solutions, and the diverse
   set of applications that need to be supported, it should be clear
   that any standardization work should take great pains to be future-
   proof.  This would seem to imply not standardizing complete reliable
   multicast transport protocols in one pass, but rather examining the
   degree to which such protocols are separable into functional building



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   blocks, and standardizing these blocks separately to the maximum
   degree that makes sense.  Such an approach allows for protocol
   evolution, and allows applications with new constraints to be
   supported with maximal reuse of existing and tested mechanisms.

8.  Acknowledgments

   This document represents an overview of the reliable multicast design
   space.  The ideas presented are not those of the authors, but are
   collected from the varied presentations and discussions in the IRTF
   Reliable Multicast Research Group.  Although they are too numerous to
   list here, we thank everyone who has participated in these
   discussions for their contributions.

9.  Authors' Addresses

   Mark Handley
   ATT Center for Internet Research at ICSI,
   International Computer Science Institute,
   1947 Center Street, Suite 600,
   Berkeley, CA 94704, USA

   EMail: [e-mail]


   Sally Floyd
   ATT Center for Internet Research at ICSI,
   International Computer Science Institute,
   1947 Center Street, Suite 600,
   Berkeley, CA 94704, USA

   EMail: [e-mail]


   Brian Whetten
   Talarian Corporation,
   333 Distel Circle,
   Los Altos, CA 94022, USA

   EMail: [e-mail]











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   Roger Kermode
   Motorola Australian Research Centre
   Level 3, 12 Lord St,
   Botany  NSW  2019,
   Australia

   EMail: [e-mail]


   Lorenzo Vicisano
   Cisco Systems,
   170 West Tasman Dr.
   San Jose, CA 95134, USA

   EMail: [e-mail]


   Michael Luby
   Digital Fountain, Inc.
   600 Alabama Street
   San Francisco, CA  94110

   EMail: [e-mail]

10.  References

   [BC94]     K. Birman, T. Clark.  "Performance of the Isis Distributed
              Computing Toolkit." Technical Report TR-94-1432, Dept. of
              Computer Science, Cornell University.

   [BKKKLZ95] J. Bloemer, M. Kalfane, M. Karpinski, R. Karp, M. Luby, D.
              Zuckerman, "An XOR-based Erasure Resilient Coding Scheme",
              ICSI Technical Report No. TR-95-048, August 1995.

   [BLMR98]   J. Byers, M. Luby, M. Mitzenmacher, A. Rege, "A Digital
              Fountain Approach to Reliable Distribution of Bulk Data",
              Proc ACM SIGCOMM 98.

   [CDT99]    Cain, B., Deering, S., and A. Thyagarajan, "Internet Group
              Management Protocol, Version 3", Work in Progress.

   [FLST98]   Farinacci, D., Lin, S., Speakman, T. and A. Tweedly, "PGM
              reliable transport protocol specification", Work in
              Progress.

   [FJM95]    S. Floyd, V. Jacobson, S. McCanne, "A Reliable Multicast
              Framework for Light-weight Sessions and Application Level
              Framing", Proc ACM SIGCOMM 95, Aug 1995 pp. 342-356.



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   [Ha99]     Handley, M., "Multicast address allocation protocol
              (AAP)", Work in Progress.

   [HC97]     M. Handley and J. Crowcroft, "Network text editor (NTE) a
              scalable shared text editor for MBone," ACM Computer
              Communication Review, vol. 27, pp. 197-208, Oct. 1997. ACM
              SIGCOMM'97, Sept. 1997.

   [KCW98]    Kadansky, M., Chiu, D. and J. Wesley, "Tree-based reliable
              multicast (TRAM)", Work in Progress.

   [LMSSS97]  M. Luby, M. Mitzenmacher, A. Shokrollahi, D. Spielman, V.
              Stemann, "Practical Loss-Resilient Codes", Proc ACM
              Symposium on Theory of Computing, 1997.

   [MWB+98]   Montgomery, T., Whetten, B., Basavaiah, M., Paul, S.,
              Rastogi, N., Conlan, J. and T. Yeh, "THE RMTP-II
              PROTOCOL", Work in Progress.

   [PPV98]    C. Papadopoulos, G. Parulkar, and G. Varghese, "An error
              control scheme for large-scale multicast applications," in
              Proceedings of the Conference on Computer Communications
              (IEEE Infocom), (San Francisco, California), p. 1188,
              March/April 1998.

   [Ri97]     L. Rizzo, "Effective erasure codes for reliable computer
              communication protocols," ACM Computer Communication
              Review, vol.  27, pp. 24-36, Apr. 1997.

   [RV97]     L. Rizzo, L. Vicisano, "A Reliable Multicast data
              Distribution Protocol based on software FEC techniques",
              Proc. of The Fourth IEEE Workshop on the Architecture and
              Implementation of High Performance Communication Systems
              (HPCS'97), Sani Beach, Chalkidiki, Greece June 23-25,
              1997.

   [RVC98]    L. Rizzo, L. Vicisano, J. Crowcroft, "The RLC multicast
              congestion control algorithm", submitted to IEEE Network -
              special issue multicast.

   [RMWT98]   Robertson, K., Miller, K., White, M. and A. Tweedly,
              "StarBurst multicast file transfer protocol (MFTP)
              specification", Work in Progress.

   [WHA98]    Wallner, D., Hardler, E. and R. Agee, "Key Management for
              Multicast: Issues and Architectures", RFC 2627, June 1999.





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   [WKM94]    Brian Whetten, Simon Kaplan, and Todd Montgomery, "A high
              performance totally ordered multicast protocol," research
              memorandum, Aug. 1994.

   [WGL97]    C.K. Wong, M. Gouda, S. Lam, "Secure Group Communications
              Using Key Graphs," Technical Report TR 97-23, Department
              of Computer Sciences, The University of Texas at Austin,
              July 1997.











































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11.  Full Copyright Statement

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.



















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