CURRENT_MEETING_REPORT_ Reported by Peter Ford/Los Alamos National Laboratory Minutes of the Source Demand Routing Working Group (SDR) Tony Li opened the meeting and bashed the agenda into shape. It was subsequently dynamically reordered. Deborah Estrin gave an overview of SDRP, noting the specification for SDRP has not changed since the last meeting. She requested that people read the specification and provide more comments. Deborah reported on a prototype implementation by Daniel Zapalla at USC based on the SunOS DARTnet kernel. Tests were conducted on a small 4-node testbed at USC, and on DARTnet. There is a kernel interface establishing source routes, filtering and encapsulation. There is a routing socket interface for the D-FIB. USC is interested in seeing more people pick up the code and build experimental testbed islands, and then interconnecting them for later interdomain experimentation. Christian Huitema asked about anycast, and Yakov noted that the AS number is a group address. Further work remains to be done in defining the requirements for anycasting, but there appears to be nothing in the SDRP specification that would be a substantial limitation. Tony Li reported on his work on BGP/IDRP interaction with SDRP. The original idea was to route SDRP control messages to AS representatives (e.g. to query AS for policy). This functionality is possible by changing routing of control messages, with the last address being an AS address. Thus the BGP attribute is no longer needed for this functionality. Tony will fix the specification to reflect this change. The IDRP attribute is still useful for tunneling. Yakov has a draft of this attribute and will post it as an Internet-Draft shortly. Tony reported on the policy language he has been working on. It is C-like. Tony would like to get more comments on the specification. The evaluation of policy is boolean. The functionality will be familiar to people who are familiar with cisco access lists. The OR operator (distinct from ||) can be used to ignore a term which cannot be evaluated (bottom). Christian Huitema suggested that the access control aspects of this language should be checked against the work on IP security. Future work will include policy based on source and destination AS number (using the DNS?), source and destination communities, and there may be some work on richer pattern matching on the entire SDRP route if there is a need. There could be some work on time varying characteristics, such as load or delay. Steve Hotz sent mail suggesting that Tony think about evaluating policy terms to preference continuous values instead of boolean values. Tony reported on his work on Information Distribution. The plan is to get the current AS topology from some static source. It was suggested to see RIPE-81 for an expression of this information. Christian noted that we probably need to consider higher levels of aggregation of this information above ASs. Deborah stated that she needs to do a rework of the futures document which deals with scaling issues. She will update the document. Deborah reported on SDRP setup work. Setup is done via an explicitly source routed packet with the probe bit set. The motivation for these setups is to reduce the header size. It is not a requirement for a router to participate. It can strip the probe bit, send it ahead, and send a setup rejected message back to the originator. There was a question if the routers have to maintain information on source routes that it is currently setup for: the answer was yes. It was again noted that this is soft state. There is a draft specification of SDRP Setup that will be distributed later in the summer. Christian stated that setup needs to be investigated to see what its interactions are with regard to load splitting. Deborah noted additional work that will be considered, including multicast (and its relationship to ESL). This would be used to establish branches on multicast trees. There also needs to be better tools for building SDRP routes. Task List: 1) Review of Specification. Tony will lead a section by section read of the document at the next IETF. Christian Huitema, Keith Mitchell, Shezahd Merchant agreed to read the entire specification and comment as soon as possible. 2) MIB -- Yakov will find someone to do this. 3) Usage Internet-Draft -- Peter Ford 4) Gated hack needed to populate D-FIB. Sue Hares/John Scudder 5) Experiments with SDRP Merit -- Hares and Scudder Lothberg Scott Brim - maybe 6) Mapping packets/ packet classification 7) DNS support for IP to AS number mapping Peter Ford will talk with RIPE-81 people 8) Policy Language -- Tony Li and Steve hotz 9) Request/Response protocol -- Tony Li 10) Futures Update -- Deborah 11) Tony will do two specification changes for: passing control messages to ASs setup -- translate request to explicit route Attendees Michael Anello mike@xlnt.com Toshiya Asaba asaba@iij.ad.jp Cynthia Bagwell cbagwell@gateway.mitre.org Dennis Baker dbaker@wellfleet.com John Ballard jballard@microsoft.com John Burnett jlb@adaptive.com Ross Callon rcallon@wellfleet.com Henry Clark henryc@oar.net Francis Dupont francis.dupont@inria.fr Deborah Estrin estrin@usc.edu Dino Farinacci dino@cisco.com Peter Ford peter@goshawk.lanl.gov Vince Fuller vaf@stanford.edu Susan Hares skh@merit.edu Denise Heagerty denise@dxcoms.cern.ch Frank Hoffmann hoffmann@dhdibm1.bitnet Nandor Horvath horvath@sztaki.hu David Jacobson dnjake@vnet.ibm.com John Krawczyk jkrawczy@wellfleet.com Tony Li tli@cisco.com Robin Littlefield robin@wellfleet.com Jun Matsukata jm@eng.isas.ac.jp Keith Mitchell keith@pipex.net Ramin Najmabadi najmabadi@helios.iihe.rtt.be Peder Chr. Noergaard pcn@tbit.dk Erik Nordmark nordmark@eng.sun.com Petri Ojala ojala@eunet.fi Juergen Rauschenbach jrau@dfn.de James Reeves jreeves@synoptics.com Yakov Rekhter yakov@watson.ibm.com Duncan Rogerson d.rogerson@nosc.ja.net Shawn Routhier sar@epilogue.com John Scudder jgs@merit.edu John Stewart jstewart@cnri.reston.va.us Fumio Teraoka tera@csl.sony.co.jp Paul Traina pst@cisco.com Rene van der Hauw rene@geveke.nl Willem van der Scheun scheun@sara.nl Jost Weinmiller jost@prz.tu-berlin.d400.de Jessica Yu jyy@merit.edu