1. www.ggf.org Description: This document reviews and compares different emerging alternatives to the Standard TCP protocol that try to solve issues present in particular applications and environments. Pascale VICAT-BLANC PRIMET INRIA - FRANCE Agenda: June 03: First draft discussed at GGF8 November 03: New editors nominated March 04: Revised draft GGF10 April 05 : Deliver final document for public comment May-June 05: Public comments End July 05: Last Modifications will be integrated August- September 05: Official publication? Informational Documents (GFD-I) (RG & WG) inform the community of an interesting and useful Grid-related technology, architecture, framework, or concept. Survey of Transport Protocols other than Standard TCP

2. www.ggf.org Plan 1) Introduction 2) Methodology and comparaison Criterions  Transport service functions and protocol features?  Comparaison criterions 3) Protocol Descriptions  3.1) Protocols based on UDP  UDP, UDP lite, RBUDP, TSUNAMI, SABUL, UDT...  3.2) TCP variant  HS-TCP, Scalable-TCP, BIC & CUBIC (in Linux distribution), Westwood+  3.3) TCP-friendly congestion control mechanism  TFRC  3.4) Protocols requiring router support  XCP, CADPC/PTP  3.5) Others  SCTP, DCCP, GridFTP 4) Deployment considerations 5) Security Considerations

3. www.ggf.org Protocol description Contacts URLs / RFCs / Papers: Principle / Description of Operation Supported operation mode Authentication Implementation / API Congestion Control Algorithms Fairness: TCP Friendly Analytical Model Results Target Usage Scenario

4. www.ggf.org Editors and contributors  Mathieu Goutelle, ENS Lyon, France  Yunhong Gu, University of Illinois at Chicago  Eric He, University of Illinois at Chicago (editor)  Sanjay Hegde, Argonne National Laboratory  Rajikumar Kettimuthu, Argonne National Laboratory  Jason Leigh, University of Illinois at Chicago  Pascale Vicat-Blanc Primet, INRIA, France (editor)  Michael Welzl, University of Innsbruck, Austria (editor)  Chaoyue Xiong, University of Illinois at Chicago  Email of corresponding author : Pascale.Primet@inria.fr  Website will be maintained (and merged with pfldnet site)  See http://www.ens-lyon.fr/LIP/RESO/pfldnet05http://www.ens-lyon.fr/LIP/RESO/pfldnet05 (Protocols for Very Long Distance High Speed Networks)

5. www.ggf.org General comments Thank you for producing a very important survey. It is timely and much needed by the community ((Nagi Rao - ONRL) Thank you for the very informative survey! (Prof. Mario Gerla and Medy Sanadidi - UCLA) In view of this fairly extensive body of published work, it might be useful to include mention of H-TCP if your survey is to be complete. (prof. Douglas Leight Hamilton U IR) the document presents a summary of current high-speed transport protocols (Prof. Joe Touch and Aaron Falk - ISI) Only very positive or constructive comments. This survey is needed Rq: I think I miss a lot of message due to mailbox overflow… :(( People do not comment on GGF site

6. www.ggf.org Many Suggestions Editing comments : =>OK will be integrated quickly New references (XCP, UDT…) : =>OK will be integrated quickly Other issues with high speed: - issues inside the host : scheduling, buffering, and tuning considerations. - configuration issues, such as path MTU discovery - how many 'connections' are supported and why - large MTU support => OK a small section + pointer netissues Other TCP protocol: - H-TCP (Hamilton institute) =>I think it is relevant, and you? Historical high-speed protocols - NetBLT, XTP, VMTP =>brief, I think it is relevant, and you? Other UDP-based protocol: - HURRICANE => ? What do you think?

7. www.ggf.org GGF status David Martin (GGF reviewer) Public comment is now complete. I would like the authors/editors to consider the public comment about co- submitting to the IETF I think this document is ready for publication. If the authors would like to apply some further small edits or tuning, please do so before re-uploading the next version. Once it's there, we'll go ahead and publish it as a GFD.

8. www.ggf.org Next steps Integrate the suggested comments for the end of july. Wait for publication as GFD Announce to GGF, networking and IETF communities Do we co-submit to IETF? Thank you for your comments Pascale.primet@ens-lyon.fr If you think DT-RG should continue, please let me informed There are lot of protocol issues but not restricted to GGF. IETF people are concerned… pfldnet is also still very active as independant « research group »