CURRENT_MEETING_REPORT_ Reported by Mark Laubach/Hewlett-Packard Minutes of the IP Over Asynchronous Transfer Mode Working Group (IPATM) Agenda The agenda was bashed to be the following: o Introduction---working group work plan and dormancy o Default MTU draft status o IP multicast statement o ATM forum update o LAN emulation introduction o Firewall security discussion o Conventional IP over ATM model o Implementation guide Working Group Dormancy After Toronto After the Toronto meeting, IPATM will go ``dormant.'' Current work includes implementation guide, multicast, and security. These items should be completed either before or at the Toronto meeting. ATM needs to ``grow up.'' Implementation experience must be gathered to support Proposed Standard to Draft Standard status elevation for RFC 1483, RFC 1577, and the MTU draft. Discussions will continue on the mailing list. The framework to guide the post-classical work needs to be developed. In Toronto, there will be one working group session that will only focus on any open work items. Informational exchange will be done outside the meeting, e.g., on the mailing list or in BOF sessions. ATM Forum Update - Drew Perkins Drew Perkins is our new ATM Forum liaison. The ATM Forum Technical Committee is divided into a number of working groups: Physical, LES, Signalling, B-ICI, Private NNI, Service Aspects and Applications, Traffic Management, Testing, and Network Management. UNI 3.0 was released in the fall. UNI 3.1 will be released this coming summer/fall. o Physical (PHY) - Existing standards: SONET STS-3c (155 Mbps) over multi-mode and single-mode, DS3 (45 Mbps), 100 Mbps TAXI 4B5B, and 155 Mbps TAXI 8B10B - New standards: DS1, SONET STS-3c over Cat-5 UTP, and SONET STS-1 over Cat-3 UTP - Future standards: SONET STS-12c (622 Mbps) over fiber/copper o Traffic Management (TM) ABR/VBR+. There are two proposals: rate-based FECN/BECN and credit-based per VC link-by-link flow control. In September 1994, a vote will be taken on which scheme, with completion in May 1995. o Signalling There are three scopes: - UNI 3.1: alignment with ITU; corrections/typos; due in summer/fall 1994 - P-NNI Phase 0/1: symmetric Q.2931 network side procedures - UNI Phase 2 (UNI 4.0?): group addresses; anycast addresses; leaf-initiated join; multipoint-to-multipoint; network layer information o Private NNI (P-NNI) - Phase 0 (proposal at this time, will be revisited in May) * simple symmetric signalling * static routes * Summer '94 - Phase 1 * link-state based (IS-IS/OSPF) * progress on architecture/terms * performance metrics TBD---May 1994 meeting * will standardize generic call admission control algorithm model for metrics * hierarchical with arbitrary levels * NSAPAs * Complete November 1994 vote March 1995 o Service Aspects and Applications - Committed to new SSCS on top of AAL5 - Video/Audio SSCS (VASSCS) based on IETF RTP * time base recovery * jitter removal * bit error detection * cell-loss detection o Network Management - M1 - private to private - M2 - AToM MIB - M3 - private to public - M4 - public to public - ILMI - clarifications in UNI 3.1, new version object LAN Emulation - Keith McCloghrie Keith's presentation slides follow these minutes. Note that the presentation covered work in progress. Conventional IP over ATM Draft Discussion - Masataka Ohta o Non Goals - No IP communication over WAN - No LIS - No Large single datalink layer (datalink layer is small in the model) o Physical Layer - Physical layer can be divided into multiple datalink [regions?] over the same datalink layer - Some nodes act as bridges (no IP capability) and routers (with IP capability) - With small datalink layer, one can implement broadcast o Routing Mechanism - Connectionless packets router: cell switch connects to routing manager - Setting up direct transport connection request/grant protocol - Direct transport connection, cells are forward directly o Datalink layer connection - Transport layer connection via direct datalink connections - Performed by protocol done in ATM Forum - Connections done via routers, routers forward cell by cell o Comparison to LAN Emulation - Just like IP over Ethernet - Datalink layer broadcast - Packet-wise forwarding (between datalinks only) - No support network layer - No cell-wise forwarding (ATM visible) Multicast Issues - General Discussion A discussion was held on the IP multicast to ATM multicast mapping issue. There was much discussion on this issue. A design team has been formed, lead by Bryan Lyles, to focus on this issue for the Toronto meeting. A Bellcore patent on ATM multicast was issued on 1 March 1994. We are looking into the patent in detail. Preliminary review indicates there will not be any conflicts. A design team will produce a report and possible framework. Security Issues - General Discussion o L3 information in call setup would help ATM Forum. IETF should be responsible for the definition of this information. o Need to prevent fraud in the IP<>ATM coupling only. Must guarantee mappings. o CERT is interested in call setup. Extension of information to block. Further discussion will take place on the mailing list to see where we want/need to take this. ATM UNI Signalling Support for IP over ATM - Maryann Perez Maryann's presentation slides follow these minutes. A sample setup message was presented. There was much discussion on coding details. The strong consensus of the working group was that the current document has the correct scope and that it should be edited to clarify some issues, and to proceed as quickly as possible towards turning it into an Informational RFC. Also, the current document should be written as to not preclude further follow-on work, e.g., such as tracking advances in ATM Forum specifications (UNI 3.1) or other related work in this area. The document will be revised as soon as possible and sent to the list for discussion. Attendees Nashwa Abdel-Baki nashwa@frcu.eun.eg Edward Allen eallen@wellfleet.com Anthony Alles aalles@cisco.com Mark Allyn allyn@netcom.com Steven Andersen scanders@mhs.sp.paramax.com Nutan Behki nebhki@newbridge.com Eric Bennett reb@aads.com Lou Berger lberger@bbn.com Richard Binder rbinder@cnri.reston.va.us Dana Blair dblair@vnet.ibm.com Kym Blair kdblair@dockmaster.ncsc.mil Uri Blumenthal uri@watson.ibm.com Tony Bogovic tjb@bellcore.com Erik-Jan Bos erik-jan.bos@surfnet.nl Michael Bradley bradley@mdd.comm.mot.com Scott Brim swb1@cornell.edu Dick Brooks d.brooks@ieee.org Al Broscius broscius@bellcore.com Caralyn Brown cbrown@wellfleet.com Theodore Brunner ted.brunner@tek.com Steve Buchko stevebu@newbridge.com Carter Bullard wcb@cert.org Jerry Burchfield burchfiel@bbn.com Brad Burdick bburdick@radio.com John Carlson johnc@cac.washington.edu Brian Carpenter brian@dxcoms.cern.ch Greg Celmainis gregc@newbridge.com Vinton Cerf vcerf@cnri.reston.va.us Brett Chappell bchappe@relay.nswc.navy.mil David Chen dchen@vnet.ibm.com Ping Chen ping@apple.com Luo-Jen Chiang ljc@lsnhbu1.lincroftnj.ncr.com Eric Chin-Li-Sun ericc@tera.com Bobby Clay clay@pscni.nasa.gov Bob Cole rgc@qsun.att.com Michael Collins collins@es.net Richard Cornetti cornetti@wg.com Matt Crawford crawdad@fncent.fnal.gov David Crowe crowed@osshe.edu Jonathon Crowhurst crowhurs@admin.ogi.edu Bruce Davie bsd@bellcore.com Farokh Deboo fjd@synoptics.com Michael Elkins elkins@areo.org Dario Ercole Dario.Ercole@cselt.stet.it Steve Feldman feldman@mfsdatanet.com Dennis Ferguson dennis@ans.net Robert Fink rlfink@lbl.gov William Fink bill@wizard.gsfc.nasa.gov H. Tom Fitzpatrick fitz@ddn.af.mil Shoji Fukutomi fuku@furukawa.co.jp Steve Fulling fulling@cs.orst.edu Eugene Geer ewg@cc.bellcore.com William Gilliam wag@cup.hp.com Walter Guilarte guilarte@wg.com Chris Gunner gunner@dsmail.lkg.dec.com William Haggerty haggerty@ctron.com Martyne Hallgren mh16@cornell.edu Joel Halpern jhalpern@newbridge.com Dimitry Haskin dhaskin@wellfleet.com Ken Hayward Ken.Hayward@bnr.ca Ian Heavens ian@spider.co.uk Juha Heinanen juha.heinanen@datanet.tele.fi Greg Hill ghill@atmsys.com Eric Hoffman hoffman@cmf.nrl.navy.mil John Houlker j.houlker@waikato.ac.nz David Jacobson dnjake@vnet.ibm.com Jeff Johnson jjohnson@cisco.com Yasuhiro Katsube katsube@mail.bellcore.com Manu Kaycee kaycee_m@timeplex.com Berry Kercheval kercheval@parc.xerox.com Percy Khabardar percyk@cisco.com Sun-Kwan Kimn sunkimn@cup.hp.com Jim Knapik knapik@mdd.comm.mot.com Ted Kuo tik@vnet.ibm.com Mark Laubach laubach@hpl.hp.com John Leong john.leong@andrew.cmu.edu Ben Levy seven@ftp.com Fong-Ching Liaw fong@eng.sun.com Arthur Lin yalin@srv.pacbell.com Frank Liu fcliu@pacbell.com Paul Lu lu@pmel.noaa.gov Wen-Pai Lu wpl@bss.com Carl Madison carl@zeus.st.3com.com Chris Maeda cmaeda@cs.washington.edu Jamshid Mahdavi mahdavi@psc.edu Andrew Malis malis@maelstrom.timeplex.com Tracy Mallory tracym@3com.com Allison Mankin mankin@cmf.nrl.navy.mil Jun Matsukata jm@eng.isas.ac.jp Keith McCloghrie kzm@cisco.com Marjo Mercado marjo@cup.hp.com Donald Merritt don@arl.army.mil David Meyer meyer@ns.uoregon.edu William Miskovetz misko@cisco.com Julie Myers jmyers@network.com Osamu Nakamura osamu@wide.ad.jp Luc Nguyen luc@bss.com Ngoc-Lan Nguyen lnguyen@icp.net Roxanne Nisbet bsvnvgk@bell-atl.com William Nowicki nowicki@sgi.com Masataka Ohta mohta@cc.titech.ac.jp Michael Otto mho@netlink.com Maryann Perez perez@cmf.nrl.navy.mil Drew Perkins ddp@fore.com James Philippou japhilippou@eng.xyplex.com J. Mark Pullen mpullen@cs.gmu.edu Shahbaz Rahmanian shahbaz@ameris.ameritech.com Murali Rajagopal murali@mitre.org K. K. Ramakrishnan rama@erlang.enet.dec.com Kenneth Rehbehn kjr@netrix.com Tony Richards richards@sprintlink.net Robert Roden roden@roden.enet.dec.com Benny Rodrig brodrig@rnd-gate.rad.co.il Guenter Roeck roeck@conware.de Dan Romascanu dan@lannet.com Steven Russert srussert@atc.boeing.com Hal Sandick sandick@vnet.ibm.com Paul Schachter pschachter@atc.boeing.com Sibylle Schaller schaller@ibmpa.awdpa.ibm.com Doug Schremp dhs@magna.telco.com Dallas Scott scott@fluky.mitre.org Tim Seaver tas@concert.net Katsuhiro Sebayashi sebayasi@tnlab.ntt.jp Isil Sebuktekin isil@nevin.bellcore.com Joshua Seeger jseeger@bbn.com Uttam Shikarpur uttam@zk3.dec.com David Shur d.shur@att.com Walter Sotelo shin@hodaka.mtd.cs.fujitsu.co.jp Ira Steckler isteckle@chipcom.com Barbara Sterling bjs@mcdata.com Tim Streater t.c.streater@dante.org.uk Mark Swanson marks@ngc.com Richard Sweatt rsweatt@synoptics.com Dan Tappan tappan@lightstream.com Sally Tarquinio sallyt@gateway.mitre.org Akihiro Tominaga tomy@sfc.wide.ad.jp Claudio Topolcic topolcic@bbn.com Jerry Toporek jt@mentat.com Paul Traina pst@cisco.com Willem van der Scheun scheun@sara.nl Dono van Mierop Dono_van_Mierop@3Mail.3Com.com Curtis Villamizar curtis@ans.net Maria Vistoli vistoli@infn.it Justin Walker justin@apple.com Glenn Waters gwaters@bnr.ca Rick Wilder wilder@mcimail.com Walter Wimer ww0n+@andrew.cmu.edu Linda Winkler lwinkler@anl.gov Shian-Tung Wong shian@dcsd.sj.nec.com Dan Wood dwood@bbn.com Shinichi Yoshida yoshida@sumitomo.com Jeff Young jsy@cray.com Chin Yuan cxyuan@pacbell.com