Editor's Note: Minutes received 11/24/92 CURRENT_MEETING_REPORT_ Reported by Bob Hinden/Sun Minutes of the IP over Asynchronous Transfer Mode Working Group (ATM) Agenda o Review Latest draft of ``Multiprotocol Interconnect over ATM Adaptation Layer 5'' by Juha Heinanen. o Reach a ``rough'' consensus on one multiplexing approach. o Talk on Q.93B and ATM Signaling by Fong-Ching Liaw. o Talk on Internet/ATM Signaling Requirements by Tom Lyon. Meeting Summary During the first session on Monday, the Working Group finalized its approach for transporting Internet datagrams over ATM as described in the ``Multiprotocol Interconnect over ATM Adaptation Layer 5'' Internet-Draft written by Juha Heinanen. The document describes two approaches to encapsulating datagrams in ATM. These are: VC Based Encapsulation, and Multiplexing Encapsulation. The current draft of the document describes two approaches to multiplexing encapsulation. The two approaches proposed are roughly equivalent. They differ in the manner used to identify the protocols being encapsulated. One uses NLPID (from Frame Relay) and the other uses LLC's (from 802.x LAN). A long discussion centered around the question of whether there should be one or two multiplexing approaches. The Working Group voted and by a two to one margin that one approach was preferable. After another long discussion a vote was held to select one of the approaches. The LLC approach was the clear winner of this vote. As a result of the these votes the current draft document will be revised to only describe the VC based encapsulation and the LLC multiplexing encapsulation in the main section of the document. The Working Group also reached a consensus to submit its proposal to the Internet Engineering Steering Group (IESG) for entry into the Internet Standards as a Proposed Standard. This work is an important step in the work necessary to insure that devices (e.g., hosts, routers, etc.) using Internet protocols (e.g., TCP/IP, ISO CLNP, Appletalk, etc.) can interoperate over ATM networks. On Tuesday, Fong-Ching Liaw presented a talk on Q.93B and ATM signaling. 1 Her talk described the current state of ATM signaling in CCITT and the ATM Forum. A number of issues were uncovered that relate to signaling parameters necessary for carrying Internet traffic. Fong-Ching Liaw and Brian Lyles agreed to write a draft paper describing these issues and make recommendations regarding how they can be handled. After review by the Working Group, this document will be published as an RFC and sent to the CCITT and the ATM Forum. During Wednesday's session, Tom Lyon presented a talk on Internet and ATM Signaling Requirements. The talk covered goals for ATM, addressing requirements, header avoidance, connectionless service, multicast, and routing. Fred Sammartino, the President of the ATM Forum, attended the last day of the Working Group and asked that an official liaison be formed between the ATM Forum and the IETF IP over ATM Working Group. The purpose of this liaison is to facilitate the exchange of protocols and ideas between the two organizations. Attendees George Abe abe@infonet.com Roland Acra acra@cisco.com Randall Atkinson atkinson@itd.nrl.navy.mil Floyd Backes backes@dsmail.enet.dec.com Cynthia Bagwell cbagwell@gateway.mitre.org William Barns barns@gateway.mitre.org Ken Benstead kbenstead@coral.com Shiraz Bhanji bhanji@gateway.mitre.org Dean Blackketter deanb@apple.com Fred Bohle fab@interlink.com Rebecca Bostwick bostwick@es.net Daniel Brennan dmb@teleoscom.com Caralyn Brown cbrown@wellfleet.com Ross Callon callon@bigfut.lkg.dec.com Brian Carpenter brian@dxcern.cern.ch Charles Carvalho charles@acc.com Brett Chappell bchappe@relay.nswc.navy.mil Dilip Chatwani dilip@synoptics.com Szusin Chen szusin.chen@eng.sun.com Chi Chong cchong@synoptics.com Jim Christy christy@apple.com George Clapp clapp@ameris.center.il.ameritech.com Robert Cole rgc@qsun.att.com Michael Collins collinsms@es.net James Conklin jbc@bitnic.educom.edu Michael Conn 4387451@mcimail.com Bruce Davie bsd@bellcore.com Michael DeAddio deaddio@thumper.bellcore.com Barbara Denny denny@erg.sri.com Art Dertke dertke@gateway.mitre.org Kurt Dobbins dobbins@ctron.com Jacques Dugast dugast@issy.cnet.fr 2 Robert Enger enger@reston.ans.net Steven Fellini steve@helix.nih.gov William Fink bill@wizard.gsfc.nasa.gov Eric Fleischman ericf@act.boeing.com James Forster forster@cisco.com Joseph Godsil jgodsil@ncsa.uiuc.edu Mike Goguen goguen@src.dec.com Heather Gray heather@zk3.dec.com Terry Gray gray@cac.washington.edu Paul Griffiths griff@chang.austin.ibm.com Tony Hain alh@es.net Joel Halpern jmh@network.com Patrick Hanel hanel@yoyodyne.dco.ntc.nokia.com Eugene Hastings hastings@psc.edu Ken Hayward crm57d@bnr.ca Frank Heath heath@cmc.com Juha Heinanen juha.heinanen@datanet.tele.fi Robert Hinden hinden@eng.sun.com Jonathan Hsu brenda@penril.com Kathleen Huber khuber@bbn.com David Husak dave@synnet.com Phil Irey pirey@relay.nswc.navy.mil David Jacobson dnjake@vnet.ibm.com George Kajos kajos@coral.com Charley Kline cvk@uiuc.edu Andrew Knutsen andrewk@sco.com Mark Laubach laubach@hpl.hp.com David LeRoy dleroy@mitchell.cit.cornell.edu Fong-Ching Liaw fong@eng.sun.com David Lin lind@janus-ccm.zenith.com Bryan Lyles lyles@parc.xerox.com Andrew Malis malis@bbn.com Tracy Mallory tracym@3com.com Allison Mankin mankin@gateway.mitre.org George Marshall george@adaptive.com Jun Matsukata jm@eng.isas.ac.jp Donald Merritt don@brl.mil Kathleen Nichols nichols@apple.com Erik Nordmark nordmark@eng.sun.com Ari Ollikainen ari@es.net Hilarie Orman ho@cs.arizona.edu Joe Pagan jrp@afterlife.ncsc.mil Craig Partridge craig@bbn.com David Piscitello dave@sabre.bellcore.com Thomas Pusateri pusateri@cs.duke.edu Bala Rajagopalan braja@qsun.att.com Greg Ratta gregra@cc.bellcore.com Tony Richards Benny Rodrig 4373580@mcimail.com Manoel Rodrigues manoel_rodrigues@att.com Guenter Roeck roeck@conware.de Timothy Salo tjs@msc.edu Fred Sammartino fred@eng.sun.com Jim Scott scott@kali.enet.dec.com 3 Allyson Showalter allyson@nsipo.arc.nasa.gov Dean Skidmore deans@ralvmiz.vnet.ibm.com Keith Sklower sklower@cs.berkeley.edu Lansing Sloan ljsloan@llnl.gov Frank Solensky solensky@andr.ub.com Marco Sosa mxs@sabre.bellcore.com Scott Stein scotts@apple.com Terrance Sullivan terrys@newbridge.com Sally Tarquinio sallyt@gateway.mitre.org Kaj Tesink kaj@cc.bellcore.com Alice Wang alice.wang@eng.sun.com Von Welch vwelch@ncsa.uiuc.edu Guy Wells guy2@uswest.com Gerry White gerry@lancity.com Peter Will will@isi.edu Douglas Williams dougw@ralvmg.vnet.ibm.com Kirk Williams kirk@sbctri.sbc.com Liang Wu ltw99@bellcore.com Chin Yuan cxyuan@pacbell.com John Zalubski zalubski@nic.ddn.mil Paul Zawada Zawada@ncsa.uiuc.edu 4