5 April 2000
From: mmaeda <mmaeda@darpa.mil>
To: "'ngi-seminar@ngi-supernet.org'"
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Subject: ngi seminar telecast - Internet Topology and Traffic
Measurement
Date: Wed, 5 Apr 2000 16:47:12 -0400
NGI Distinguished Lecture - 13 April 2000, 1 PM EST
Tracking a metamorphic infrastructure: observations on our (in)ability to accurately predict, analyze or even measure conditions on the global Internet
K.C. Claffy
caida/sdsc/ucsd
kc@caida.org
Abstract:
We describe the state-of-the-art in the analysis and visualization of Internet data, using four primary categories: topology, workload, performance and routing. For each area of measurement, we assess current conditions limiting our ability to analyze, correlate, or visualize core Internet infrastructure data.
We also highlight priorities for expanding insights into traffic and routing behavior and enhancing our ability to measure and analyze the effects of new technology, protocols, and applications on the global Internet.
Topology data can describe network link infrastructure at a variety of layers. Topology measurement and analysis can reveal macroscopic characteristics of the global Internet, e.g., "how big and what constitutes the Internet 'core'?", as well as provide parameters to topology-generator models.
Workload measurements involve the passive monitoring of traffic as it traverses a link or router, and allows analysis of distributions of traffic protocol, packet size, interarrival times, geographic flow, and per-user bandwidth consumption.
Performance measurements typically involve active probing of traffic into the network to assess latency or throughput characteristics of paths. Broad scale latency measurements (i.e., to thousands of relevant hosts) at reasonable granularity can provide a database for isolating global problems within the infrastructure, as well as assessing service quality by country or other granularity of interest.
Routing data includes analysis from Border Gateway Protocol (BGP) routing tables, which reflect relationships between individual Autonomous Systems (ASes) at a given point in time.
We also show instances of correlation among different Internet data categories, and possible approaches to dealing with the inherent challenges of doing realistic correlation.
Location:
National Center for Supercomputing Applications
ACCESS Facility:
Ballston Metro Center Office Tower, Suite 800
901 North Stuart Street
Arlington, Virginia 22203
Attendance and Directions:
Space is limited. Please register using the RSVP link at the NGI-Supernet page:
http://www.ngi-supernet.org/conferences.html
Directions for getting to the Access Facility are available from the RSVP link as well. These include both Metro and parking information.
Multicast/Webcast:
The NGI Distinguished Lecture Series will be multicast live on MBONE-connected networks (warning: your interdomain multicast routing mileage may vary) and it will also be webcast using RealMedia. The live multicast will allow for questions and comments from the remote audience. To tune into the multicast, look for the announcement in your MBONE session directory program ('sdr'). If the announcement is not present there, it still may be possible to receive the session by manually configuring the client programs ('vic', and 'rat' or 'vat') with session addresses.
Details including session addresses and webcast urls will be to the seminar will be posted on:
http://www.ngi-supernet.org/conferences.html
Problems with reception of the seminars should be addressed to dartnoc@isi.edu.
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