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Seminar on "Internet Measurement Techniques" Monday May 19, 2003Session 1 - Research - Monday May 19, 2003, 0915-1130 in EL4, Elektro, Gløshaugenk claffy, CAIDA/SDSC/UCSD* Nevil Brownlee, CAIDA/SDSC/UCSD* & University of Auckland *) CAIDA - Cooperative Association for Internet Data Analysis
Session 2 - Tools - Monday May 19, 13-15, at UNINETT, Red RoomPeder J. Emstad, Q2S/NTNU k Claffy, CAIDA Olav Kvittem, UNINETT AbstractsSpeaker: k claffy, CAIDA/SDSC/UCSD Current papers that propose new techniques and protocols often make assumptions about traffic characteristics that are simply not validated by real data. Hypotheses about the level of fragmented traffic, encrypted traffic, topology characteristics, traffic favoritism, path symmetry, DOS attack prevalence, address space utilization and consumption, directional balance of traffic volume, routing protocol behavior and policy, and distribution statistics of path lengths, flow sizes, packet sizes, prefix lengths, and routing announcements therefore yield questionable analytical results. Even in cases where analysis is based on data attainable by a researcher on his or her local campus, attempts to generalize typically lose integrity in the face of more complete or representative data sets. This talk will show several examples of measurements that shed doubt on commonly assumed Internet myths. The implication is that the community could make much better use of its collective intellectual resources if we could validate ideas against a larger variety of empirical data sets before investing research and development time and energy on certain studies. kc claffy is principal investigator for CAIDA, the Cooperative Association for Internet Data Analysis, based at the University of California's San Diego Supercomputer Centre. kc's research interests include: data collection, analysis, and visualization of Internet workload, performance, topology, and routing behavior. She also works on engineering and traffic analysis requirements of the commercial Internet community, often requiring ISP cooperation in the face of commercialization/competition. Speaker: Nevil Brownlee, CAIDA/SDSC/UCSD & U Auckland Nevil is the creator of NeTraMet, a passive measurement tool for network traffic. NeTraMet provides the realtime data reduction capability needed for long-term flow measurements on high-speed network links. In recent years many researchers have noted that although large flows (Elephants) contribute a high percentage of the bytes on a link, most of the flows on a link are small (Mice). Similarly, we observe that one can classify flows by their lifetime, from short-lived (Dragonflies) to long-lasting (Tortoises). This talk will present measurements of traffic on OC3 and OC12 links at Auckland and UCSD, discuss the traffic distributions observed, and comment on the population of their various kinds of flows. Nevil Brownlee co-chaired the IETF's Realtime Traffic Flow Measurement
(RTFM) Working Group, and is now co-chair of the IP Flow Information
eXport (IPFIX) Working Group. He created NeTraMet, an open-source
implementation of the RTFM (Internet Standard) architecture at The
University of Auckland late in 1992. Nevil now works half time in
Auckland overseeing technology developments, particularly those
relating to networks, and teaching in Computer Science. He spends the
other half of his time at CAIDA in San Diego, where he pursues
research into the behaviour of Internet traffic, and continues to
develop NeTraMet so that it can handle higher-speed networks.
Administrative informationFor questions please contact the host Director Olav Kvittem, oak@uninett.no. tel. 7355 7911 LocationsUNINETT NTNU |
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