CURRENT_MEETING_REPORT_
Reported by Bob Hinden/Sun
Minutes of the IP over Asynchronous Transfer Mode Working Group (ATM)
Agenda
o Overview of ATM Forum Addressing Work, Keith McCloghrie
o Address Resolution in ATM Networks, Subbu Subramaniam
o Architecture, Address Translation, and Call Control, Fong-Ching
Liaw
o NBMA Address Resolution Protocol (NBMA ARP), Juha Heinanen
o General Discussion of ATM Address Resolution
o Issues in the Interconnection of LANs and ATM Networks, Tim Salo
The IP over Working Group meet for three sessions at the March IETF
meeting. Over 129 people attended the Working Group sessions.
The first session consisted of four presentations on ATM addressing and
ATM/Internet address resolution. Keith McCloghrie presented an overview
of the ATM Forum addressing work. Subbu Subramaniam presented his ideas
on how ATM address resolution should work. Fong-Ching Liaw Presented
pros and cons of Subnet and Peer model of address resolution in ATM
networks and Juha Heinanen presented an overview of his NBMA Address
Resolution Protocol (NBMA ARP) proposal.
There was considerable discussion about how address resolution should
work, and the pros and cons of the subnet vs. peer model. There were
strong views on both sides. Subnet model is a conventual internet model
where each network has it own addressing, and internetworking routing
and addressing runs on top of this. In the peer model the ATM network
is knowledgeable about and participates in Internet routing. Call
connection (signaling) requests would use internet address to specify
destination. The session ended with the suggestion that neither one
approach would prevail and that there should be proposed mechanisms for
combining the two approaches.
Mark Leabach presented slides with his thoughts on which areas the
Working Group should focus on first. He saw two approaches in the
Working Group: Functional layerists (ATM as a wire-replacement) vs.
ATM IP Morph'ist. He made a strong argument that the Working Group
should first specify how IP over ATM should work in the ``classical IP''
mode where ATM networks are connected by routers. He presented the
following problems which need to be solved:
o IP Encapsulation in ATM (Done).
o How to ``Roll your own'' wires over ATM between IP elements in the
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Network.
o How to Dynamically find other IP hosts on an ATM LAN.
o How to do connection-less service.
o Knowing that you have an all ATM path between IP elements, what
optimizations can be made?
o Authentication VC Call Setup.
o Management Tools such as Trace route.
o Resource Setup/QOS.
o IP Multicast to ATM Multicast.
Tim Salo presented a talk on the Gigabit Testbed Talk. The goal of the
project is to create a seamless connection between ATM LAN's and ATM
WAN's. His preliminary observations were that there are no complete
proposals available today, some ares only slightly explored or
identified, much new functionality must be implemented, and most of the
problems are in the wide area. He grouped issues into several problem
areas:
o ATM Address Assignment
o IP Address Assignment
o Address resolution
o IP over ATM Internets
o IP route optimization
o Locality (IP only talks to local entities)
His final observations were that we need a complete solution if ATM is
going to be the solution. It is important to avoid making the customer
the system integrator. Significantly more implementation experience is
needed.
Ramon Caceres presented the results of his simulation of different
approaches for VC multiplexing. His conclusions were that one VC per
connection gives the best performance, followed by one VC per type of
traffic (e.g., telnet, ftp, mail, etc.). One VC per router pair gives
poor performance. The overall goal should be to separate traffic as
much as possible
After a final discussion of subnet vs. peer addressing models, the
Working Group agreed that the following issues were important to pursue:
o Focus on Subnet model first. Work on the peer model should
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continue, but it is important to develop a solution for the subnet
model first.
o Prefer strongly typed addresses with peer model vs. mechanical
address translation
o Simulation of Subnet model is important. Need to look at
performance issues based on data for real IP traffic.
o ARP Servers will need mechanisms for updating and synchronizing
databases.
o Charging is an issue with ARP servers.
o Auto configuration and discovery of ARP servers necessary.
Action Items
The following actions items were assigned:
Steve Willis: Write contribution to be submitted to the ATM forum
on encapsulation (LLC) negotiation. Due in 1 Week.
Mark Leabach: Write a framework document describing the using ATM
in the Classical IP Model (i.e., ATM networks
connected by routers). Due prior to next IETF
Meeting.
Robert Cole: Write a framework document describing the using ATM
in the End-End Model (i.e., seamless ATM from
initial source to final destination). Due prior to
next IETF Meeting.
Juha Heinanen: Complete draft on NBMA Address Resolution. Will
include both General Media Independent specification
and ATM specific usage guidelines. Due prior to
next IETF Meeting.
Bob Hinden: Develop a list of IPoverATM Issues. Due in May.
Attendees
Masuma Ahmed mxa@sabre.bellcore.com
Robert Aiken aiken@es.net
N. Akiko Aizawa akiko@nacsis.ac.jp
Kannan Alagappan kannan@dsmail.lkg.dec.com
David Arneson arneson@ctron.com
Fred Baker fbaker@acc.com
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Serpil Bayraktar sbb@noc.ans.net
Nutan Behki Nutan_Behki@qmail.newbridge.com
Tom Benkart teb@acc.com
Lou Berger lberger@bbn.com
B. Sue Blair bsb@noc.ans.net
John Boatright bryan_boatright@ksc.nasa.gov
Rich Bowen rkb@ralvm11.vnet.ibm.com
Deborah Boyer djb@noc.ans.net
Monroe Bridges monroe@cup.hp.com
Thomas Brisco brisco@pilot.njin.net
Caralyn Brown cbrown@wellfleet.com
Theodore Brunner tob@thumper.bellcore.com
Randy Butler rbutler@ncsa.uiuc.edu
Ramon Caceres ramon@mitl.com
Ross Callon rcallon@wellfleet.com
Jeff Carman tcarman@bnr.ca
John Chang jrc@uswest.com
Yee-Hsiang Chang yhc@hpl.hp.com
Anthony Chow chow_a@wwtc.timeplex.com
Thomas Christie tfc@aa.ans.net
George Clapp clapp@ameris.center.il.ameritech.com
Richard Cogger R.Cogger@cornell.edu
Robert Cole rgc@qsun.att.com
Michael Collins collinsms@es.net
Rob Coltun rcoltun@ni.umd.edu
Tracy Cox tacox@sabre.bellcore.com
Dave Cullerot cullerot@ctron.com
Brent Curtiss bcurtiss@magnuss.ocs.ohio-state.edu
James Davin davin@thumper.bellcore.com
Shane Dawalt sdawalt@desire.wright.edu
Steve DeJarnett steve@ibmpa.awdpa.ibm.com
Osmund DeSouza osmund.desouza@att.com
M.J. Dixon mjd@att.com
Kurt Dobbins kurtdob@ctron.com
Bob Downs bdowns@combinet.com
Kishan Dudkikar kishan@icm1.icp.net
Ed Ellesson ellesson@vnet.ibm.com
Chip Elliott celliot@bbn.com
Robert Enger enger@reston.ans.net
Michael Fidler fidler@mitre.org
Francois Fluckiger fluckiger@vxcern.cern.ch
Craig Fox foxcj@network.com
Karen Frisa karen.frisa@andrew.cmu.edu
Dan Frommer dan@jeremy.enet.dec.com
John Gawf gawf@compatible.com
Eugene Geer ewg@cc.bellcore.com
Kenneth Giusti kgiusti.chipcom.com
Joseph Godsil jgodsil@ncsa.uiuc.edu
Mike Goguen goguen@synoptics.com
Daniel Grossman dan@merlin.dev.cdx.mot.com
Chris Gunner gunner@dsmail.enet.dec.com
Tony Hain alh@es.net
Joel Halpern jmh@network.com
Patrick Hanel hanel@yoyodyne.trs.ntc.nokia.com
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Danny Hanson hanson.tic@commlan.safb.af.mil
Eugene Hastings hastings@psc.edu
Ken Hayward Ken.Hayward@bnr.ca
Frank Heath heath@cmc.com
Roland Hedberg Roland.Hedberg@rc.tudelft.nl
John Heimaster jwh@mps.ohio-state.edu
Juha Heinanen juha.heinanen@datanet.tele.fi
Robert Hinden hinden@eng.sun.com
Don Hofacker hofacker@dtedi.hq.aelc.af.mil
Don Hoffman hoffman@eng.sun.com
Frank Hoffmann hoffmann@dhdibm1.bitnet
John Hopprich hopprich@davidsys.com
Kathy Huber khuber@bbn.com
Phil Irey pirey@relay.nswc.navy.mil
Keisuke Ito itoh@msen.com
David Jacobson dnjake@vnet.ibm.com
David Johnson dbj@cs.cmu.edu
Merike Kaeo merike@alw.nih.gov
Kenneth Key key@cs.utk.edu
Glenn Kime itoh@msen.com
Charley Kline cvk@uiuc.edu
Stev Knowles stev@ftp.com
Lakshman Krishnamurthy lakashman@ms.uky.edu
Giri Kuthethoor giri@ms.uky.edu
Mark Laubach laubach@hpl.hp.com
Fong-Ching Liaw fong@eng.sun.com
Yu-Lin Lu yulin@hpinddu.cup.hp.com
Paul Lustgraaf grpjl@iastate.edu
Charles Lynn clynn@bbn.com
Carl Madison carl@startek.com
Jamshid Mahdavi Mahdavi@a.psi.edu
James Mahon mahonj@honfsi1.att.com
Andrew Malis malis_a@timeplex.com
Tracy Mallory tracym@3com.com
Allison Mankin mankin@cmf.nrl.navy.mil
Michael Marcinkevicz mdm@csu.net
Cynthia Martin martin@spica.disa.mil
Jerry Martin jerry+@osu.edu
Matt Mathis mathis@a.psc.edu
Jun Matsukata jm@eng.isas.ac.jp
Keith McCloghrie kzm@hls.com
Donald Merritt Don@brl.mil
David Meyer meyer@ns.uoregon.edu
Gerry Meyer gerry@spider.co.uk
James Miner jjm@fibercom.com
Robert Mines rfm@sandia.llnl.gov
Greg Minshall minshall@wc.novell.com
Matthew Morrisey morrisey@wpsp01.hq.aflc.af.mil
Judy Nasar jdnasar@magnus.acs.ohio-state.edu
Steve Neruda neruda@morningstar.com
Tom Nisbet nisbet@tt.com
David O'Leary doleary@cisco.com
Zbigniew Opalka zopalka@agile.com
Ayal Opher aopher@synoptics.com
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Joe Pagan jrp@afterlife.ncsc.mil
Laura Pate pate@gateway.mitre.org
Maryann Perez perez@cmf.nrl.navy.mil
Drew Perkins ddp@fore.com
Radia Perlman perlman@dsmail.enet.dec.com
Roy Perry rperry@advtech.uswest.com
James Philippou japhilippou@eng.xyplex.com
David Piscitello dave@mail.bellcore.com
Narendra Popat albin@frontier.com
Dave Rand dave_rand@novell.com
Venkat Rangan venkat@.metrix.com
David Reese dave@csu.net
Bradley Rhoades bdrhoades@mail.mmmg.com
Tony Richards richards@icm1.icp.net
Michael Roberts mmr@drwin.ptvy.ca.us
Ben Robinson ben_robinson@vnet.ibm.com
Kenneth Rodemann krr@qsun.att.com
Benny Rodrig 4373580@mcimail.com
Steve Romig romig@cis.ohio-state.edu
Shawn Routhier sar@epilogue.com
Timothy Salo tjs@msc.edu
Hal Sandick sandick@vnet.ibm.com
Vilson Sarto vilson@fapq.fapesp.br
Shiva Sawant shiva@synoptics.com
Andrew Schmidt ags@uius.edu
Tim Seaver tas@concert.net
Paul Serice serice@cos.com
Kanan Shah kshag@cmf.nrl.navy.mil
Karen Shay kshay@cs.cmu.edu
Allyson Showalter allyson@nsipo.arc.nasa.gov
Keith Sklower sklower@cs.berkeley.edu
Andrew Smith asmith@synoptics.com
Marco Sosa mxs@sabre.bellcore.com
Roxanne Streeter streeter@nsipo.arc.nasa.gov
Richard Stuart dickstuart@attmail.com
Subbu Subramaniam subbu@cup.hp.com
Terry Sullivan terrys@newbridge.com
Wayne Tackabury wayne@cayman.com
Sally Tarquinio sallyt@gateway.mitre.org
John Tavs tavs@vnet.ibm.com
Kaj Tesink kaj@cc.bellcore.com
Kamlesh Tewani ktt@arch2.att.com
Susan Thomson set@bellcore.com
Marek Tomaszewski marek@net.com
Mario Vecchi mpv@thumper.bellcore.com
Huyen Vu vu@polaris.disa.mil
Chuck Warlick warlick@theophilis.nsfc.nasa.gov
Scott Wasson sgwasson@eng.xyplex.com
Jack Waters waters@sura.net
James Watt james@newbridge.com
Von Welch vwelch@ncsa.uiuc.edu
Rick Wilder wilder@ans.net
Kirk Williams kirk@sbctri.sbc.com
Steven Willis steve@wellfleet.com
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Walter Wimer walter.wimer@andrew.cmu.edu
Linda Winkler lwinkler@anl.gov
Richard Woundy rwoundy@vnet.ibm.com
Liang Wu ltw99@bellcore.com
Yow-Wei Yao yao@chang.austin.ibm.com
Chin Yuan cxyuan@pacbell.com
Paul Zawada Zawada@ncsa.uiuc.edu
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