Editor's Note: Minutes received 7/31 CURRENT_MEETING_REPORT_ Reported by Bernhard Stockman/SUNET and Steven Winnett/BBN Minutes of the IP Addressing Plan BOF (IPADDR) Introduction The BOF was Chaired by Bernhard Stockman of SUNET. The subject of the meeting was the Supernetting or CIDR (Classless Inter-Domain Routing) scheme to extend IP addressing for a few years as presented by V. Fuller, T. Li, J. Yu, and K. Varadhan in RFC 1338, ``Supernetting: an Address Assignment and Aggregation Strategy''. The Chair expressed the hope that the BOF session would come to a consensus agreement as to how this problem could be solved. An attendance list was circulated. Presentation Tony Li (cisco) gave a presentation of the CIDR scheme as outlined in RFC 1337. The presentation discussed the mechanics of how the hierarchical addressing scheme would work (allowing groups of neighboring class C networks to be described as aggregates) along with examples. Blocks would initially be allocated at the continental level, with service providers (a.k.a. regionals) in turn allocating groups of networks (where applicable) to clients. Tony Li stressed that the scheme as presented in RFC 1337 was designed as a solution for from 3 to 7 years only to the IP addressing problem in order to buy some time to come up with an acceptable longer-term solution. The handling of unused addressed space, of multihomed sites, and of service provider changes under CIDR was presented. As an initial allocation, North America and its service providers would be allocated the Class C networks under <220.0.0.0 252.0.0.0>, Europe and its service providers would be allocated the Class C networks under <216.0.0.0 252.0.0.0>, and the remaining continents would be allocated about 10,00 Class C networks each. Discussions There was some discussion of the block sizes to be allocated (i.e., would these be in 252 x 255 chunks (mask 252.0.0.0) or 255 x 255 chunks (mask 255.0.0.0). The issue of renumbering hosts was discussed. R. Callon pointed out the desirability of this, stating that if addresses were reassigned so that 1 routing could be done on the flat space of all regionals, then CIDR would scale to the point of every IP address assigned. Many others in the room, however, questioned whether it was realistic to expect that such a renumbering could ever be agreed to by the Internet community. There was some discussion of the problems which could be caused by clients giving back gaps of unallocated network numbers. Vint Cerf stated that it would be useful to gather data with respect to the number of networks already assigned, and the number of existing service providers, on a per country basis. This might provide useful background information so that scaling choices could be made in a more informed manner. Decisions Consensus appeared to be reached on the general merits of the hierarchical addressing plan as presented as a short-term solution to the IP addressing problem. There was no consensus over the issue of renumbering existing hosts and this was tabled for the next BOF. With respect to the block size issue, the Chair stated that there appeared to be a consensus around 255 x 255 chunks. Attendees Steve Alexander stevea@i88.isc.com Nagaraj Arunkumar nak@3com.com Ashar Aziz ashar.aziz@eng.sun.com William Babson bill@penril.com John Ballard jballard@microsoft.com William Barns barns@gateway.mitre.org Tony Bates tony@ean-relay.ac.uk Jordan Becker becker@nis.ans.net James Beers beers@nr-tech.cit.cornell.edu Lou Berger lberger@penril.com David Bolen db3l@nis.ans.net Scott Brim swb@cornell.edu Steve Buchko stevebu@newbridge.com Jeffrey Burgan jeff@nsipo.nasa.gov Ross Callon callon@bigfut.enet.dec.com Greg Celmainis gregc@newbridge.com Vinton Cerf vcerf@nri.reston.va.us John Chang jrc@uswest.com Robert Ching natadm!rching@uunet.uu.net Chris Chiotasso chris@artel.com Henry Clark henryc@oar.net James Cobban jcobban@bnr.ca Richard Colella colella@osi.ncsl.nist.gov Robert Collet rcollet@icm1.icp.net 2 Rob Coltun rcoltun@ni.umd.edu Jim Comen comenj@interlan.interlan.com Michael Conn 004387451@mcimail.com John Curran jcurran@bbn.com Richard desJardins desjardi@boa.gsfc.nasa.gov Peter DiCamillo Peter_DiCamillo@brown.edu Chas DiFatta chas@sei.cmu.edu Pierre Dupont dupont@mdd.comm.mot.com Tom Easterday tom@cic.net Roger Fajman raf@cu.nih.gov Stefan Fassbender stf@easi.net Dennis Ferguson dennis@mrbill.canet.ca Peter Ford peter@lanl.gov Karen Frisa karen.frisa@andrew.cmu.edu Cliff Frost cliff@cmsa.berkeley.edu Vince Fuller vaf@stanford.edu Kelly Furlong kelly@kyle.ksc.nasa.gov Der-Hwa Gan dhg@nsd.3com.com Elise Gerich epg@merit.edu Rob Graham robert_graham@protools.com Phillip Gross pgross@nis.ans.net Simon Hackett simon@internode.com.au Steve Hardcastle-Kille s.kille@isode.com Kathleen Huber khuber@bbn.com Matthew Jonson jonson@server.af.mil Kevin Jordan kej@udev.cdc.com Dan Jordt danj@nwnet.net Scott Kaplan scott@ftp.com Kenneth Key key@cs.utk.edu Paulina Knibbe knibbe@cisco.com Mark Knopper mak@merit.edu John Krawczyk jkrawczy@wellfleet.com David Kumpf kumpf@hprnd.rose.hp.com John Labbe labbe@merit.edu Sylvain Langlois Sylvain.Langlois@der.edf.fr Sharon Lewis lewis@cs.utk.edu Fong-Ching Liaw fong.liaw@eng.sun.com Hock-Koon Lim lim@po.cwru.edu Arthur Lin yalin@srv.pacbell.com Tony Li tli@cisco.com Joshua Littlefield josh@cayman.com Andrew Maffei arm@aqua.whoi.edu Carl Malamud carl@malamud.com Bill Manning bmanning@rice.edu Ed Menze menze@cs.arizona.edu Pushpendra Mohta pushp@cerf.net Paul Moran Paul_Moran@3com.com Dennis Morris morrisd@imo-uvax.disa.mil Donald Morris morris@ucar.edu Mark Needleman mhn@stubbs.ucop.edu Erik Nordmark nordmark@eng.sun.com Kraig Owen tko@merit.edu Marsha Perrott mlp+@andrew.cmu.edu Jon Postel postel@isi.edu 3 Stephanie Price Marasciulloprice@cmc.com Mark Prior mrp@itd.adelaide.edu.au Bala Rajagopalan braja@qsun.att.com David Reiser dsr@codex.prds.cdx.mot.com Sheri Repucci smr@merit.edu Simon Rosenthal simon@bos.locus.com Anthony Rutkowski amr@sprint.com Henry Sanders henrysa@microsoft.com Hellen Sears sears@interlan.interlan.com Tim Seaver tas@concert.net Karen Seo kseo@bbn.com Erik Sherk sherk@sura.net John Shriver jas@proton.com William Simpson Bill_Simpson@um.cc.umich.edu Henry Sinnreich hsinnreich@mcimail.com Frank Solensky solensky@clearpoint.com Michael St. Johns stjohns@umd5.umd.edu Martha Steenstrup msteenst@bbn.com Bernhard Stockman boss@sunet.se Fumio Teraoka tera@csl.sony.co.jp Marten Terpstra terpstra@ripe.net Linda Tom toml@interlan.interlan.com Claudio Topolcic topolcic@nri.reston.va.us Panos-Gavriil Tsigaridas tsigaridas@fokus.berlin.gmd.dbp.de Kannan Varadhan kannan@oar.net Ross Veach rrv@uiuc.edu Curtis Villamizar curtis@ans.net Bernhard Volz volz@process.com John Wagner jwagner@princeton.edu Justin Walker justin@apple.com Carol Ward cward@westnet.net William Warner warner@ohio.gov Liming Wei liming.wei@eng.sun.com Evan Wetstone evan@rice.edu Chris Wheeler cwheeler@cac.washington.edu Walter Wimer walter.wimer@andrew.cmu.edu Steven Winnett swinnett@bbn.com Richard Woundy rwoundy@rhqvm21.vnet.ibm.com Joseph Zur zur@fibhaifa.com 4