CURRENT_MEETING_REPORT_ Reported by Steve Deering/Xerox PARC and Dave Johnson/CMU Minutes of the IP Routing for Wireless/Mobile Hosts Working Group (MOBILEIP) Administrative Matters Steve Deering announced his resignation as co-chair of the working group. Greg Minshall will continue as sole chair for now, and may select a new co-chair in the near future. Meta Issues John Penners suggested splitting the Foreign Agent-Home Agent protocol specification from the Mobile Host-Foreign Agent protocol specification. It was John's opinion that the FA-HA protocol could be agreed upon immediately, while allowing multiple different MH-FA protocols to be considered or implemented. There was no immediate consensus in favor of John's suggestion. Yakov Rekhter suggested a number of changes to the mobile IP architecture and/or specification: o Observe the distinction between functional decomposition and physical instantiation. Example functions that might be instantiated in different ways are: - temporary address assignment - tunnel end-point - accounting o Allow tunneling from the mobile host back to the Home Agent (i.e., MH ! [FA] ! HA ! CH). Motivation: desire to maintain a two-way, encrypted tunnel between an MH and its home base. This suggestion triggered much discussion, with the rough consensus being that it would be a valuable option. o Extend the ICMP Router Discovery protocol to handle mobility beaconing, rather than inventing a new protocol. Most people present thought this was an excellent suggestion, and it was adopted. Note that this effects only the beaconing and solicitation functions of Mobile IP, not the other control messages---those other messages will still be carried by UDP, rather than ICMP, as agreed in previous meetings. o Support ``tunneling without encapsulation.'' This is a scheme in which, instead of encapsulating a packet to get it to a mobile host, the HA simply replaces the original destination address with the temporary remote address of the MH; since the MH also knows its own home address, it can restore the packet to its original form for local processing. There was no enthusiasm for this proposal. o Support ``home subnets'' as logical entities only, with no associated physical link---ARP and local ICMP messages are ill-suited for the mobile environment. The group was not willing to give up the option for MHs to have a physical home subnet, but agreed to move the physical home subnet procedures and list of problems/hazards to an appendix of the Mobile IP specification. Charlie Perkins suggested that the procedures for ``ad-hoc networking'' be deleted from the base specification. The group agreed to this suggestion. Section-by-Section Review of Current Draft We then engaged (for the next session and a half) in a section-by-section review of the (then) current Internet-Draft. We did not finish the detailed discussion of the complete current basic draft. After running out of time in the meeting, we decided instead to continue the discussion of the draft on the mailing list. The draft editor should produce a revised version of the draft in about two weeks, incorporating the changes discussed at the meeting. We will then hold an open discussion period on the mailing list, where comments will be accepted on the revised version of the portion of the draft that was discussed at the meeting. After some reasonable period of time (perhaps one week) for these comments, we will then move on to similarly discuss each remaining section of the draft on the mailing list, one at a time. Attendees Brian Adamson adamson@itd.nrl.navy.mil Juha-Pekka Ahopelto juha-pekka.ahopelto@ntc.nokia.com Kannan Alagappan kannan@sejour.lkg.dec.com Steve Alexander stevea@lachman.com Edward Allen eallen@wellfleet.com Michael Anello mike@xlnt.com Randall Atkinson atkinson@itd.nrl.navy.mil Dennis Baker dbaker@wellfleet.com Mohsen Banan mbanan@neda.com Nutan Behki nebhki@newbridge.com Richard Binder rbinder@cnri.reston.va.us Jim Binkley jrb@cs.pdx.edu Steven Blair sblair@dell.com Jon Boone boone@psc.edu Robert Brenner Robert.W.Brenner@gte.sprint.com Dick Brooks d.brooks@ieee.org Ken Carlberg Carlberg@tieo.saic.com John Carlson johnc@cac.washington.edu Brett Chappell bchappe@relay.nswc.navy.mil Luo-Jen Chiang ljc@lsnhbu1.lincroftnj.ncr.com Cyrus Chow cchow@ames.arc.nasa.gov Paul Ciarfella ciarfella@took.lkg.dec.com Frank Ciotti frankc@telxon.com Bob Cole rgc@qsun.att.com Stephen Deering deering@parc.xerox.com Peter DiCamillo Peter_DiCamillo@brown.edu Pierre Dupont dupont@mdd.comm.mot.com Kjeld Borch Egevang kbe@craycom.dk Antonio Fernandez afa@bellcore.com William Gilliam wag@cup.hp.com William Haggerty haggerty@ctron.com Stuart Hale stu_hale@vnet.ibm.com Duane Harkness duaneh@atc.boeing.com Marc Hasson marc@mentat.com Scott Hinnrichs smh@netserv.com Kimio Ishii ishii@sfc.wide.ad.jp Bent Jensen bent@cisco.com David Johnson dbj@cs.cmu.edu Scott Kaplan scott@wco.ftp.com Phil Karn karn@qualcomm.com Alan Katz katz@adonis.com Manu Kaycee kaycee_m@timeplex.com Edwin King eek@atc.boeing.com John Leong john.leong@andrew.cmu.edu Mark Lewis Mark.S.Lewis@telebit.com Tony Li tli@cisco.com Shoshana Loeb shoshi@thumper.bellcore.com Peter Lothberg roll@stupi.se J. Scott Marcus smarcus@bbn.com Brian Marsh marsh@mitl.com Greg Minshall minshall@wc.novell.com Kenneth Mueller ken@cmc.com Rina Nathaniel rina@rnd-gate.rad.co.il Ngoc-Lan Nguyen lnguyen@icp.net Erik Nordmark nordmark@eng.sun.com Masataka Ohta mohta@cc.titech.ac.jp Donald Pace pace@cntfl.com Richard Paine painer@ct.si.cs.boeing.com Charles Perkins perk@watson.ibm.com James Philippou japhilippou@eng.xyplex.com Rex Pugh pugh@hprnd.rose.hp.com Ram Ramanathan ramanath@bbn.com James Rees jim.rees@umich.edu Greg Ruth gruth@gte.com William Salkewicz bsalkewi@wellfleet.com Dallas Scott scott@fluky.mitre.org William Simpson bsimpson@morningstar.com Henry Sinnreich hsinnreich@mcimail.com Frank Solensky solensky@ftp.com Jim Solomon solomon@comm.mot.com Martha Steenstrup msteenst@bbn.com Walter Stickle wls@ftp.com Shirley Sun suns@centrum.com Dan Tappan tappan@lightstream.com John Tavs tavs@vnet.ibm.com Fumio Teraoka tera@csl.sony.co.jp Chandu Thekkath thekkath@washington.edu Akihiro Tominaga tomy@sfc.wide.ad.jp Willem van der Scheun scheun@sara.nl John Veizades veizades@wco.ftp.com Justin Walker justin@apple.com Jost Weinmiller jost@prz.tu-berlin.de Geoff White geoff@nexsys.net Shian-Tung Wong shian@dcsd.sj.nec.com Shinichi Yoshida yoshida@sumitomo.com