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SUMMARY:Performance Monitoring in Service Provider Networks - Paul Barford
  (University of Wisconsin-Madison).
DTSTART:20100401T150000Z
DTEND:20100401T160000Z
UID:TALK23781@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:Service Level Agreements (SLAs) define the performance guarant
 ees made by Internet Service Providers (ISPs) in terms of packet delay\, l
 oss\, variation and network availability.  In this talk\, I will describe 
 our work on SLA compliance monitoring\, which focuses on assessing whether
  the performance characteristics in a service provider network are within 
 specified bounds.  To address this problem we have developed a comprehensi
 ve set of active probe-base measurement methodologies that enables accurat
 e and efficient assessment of 1) packet loss rate\, 2) mean delay\, 3) con
 fidence intervals for delay quantile estimation\, and\n4) delay variation 
 (ie. jitter).  We implement these methods in a tool called SLAm\, which we
  use to demonstrate the capabilities of our approach in a set of controlle
 d laboratory experiments using different topologies and background traffic
  scenarios. We also extend the use of SLAm to the practical problems of de
 tecting and localizing the occurrences of SLA violations in provider netwo
 rks.  This requires additional methods for selecting which paths to probe 
 at a given point in time and then identifying the links on a path that are
  contributing to a violation event. We use a set of simulation-based exper
 iments to show that these methods are able to accurately detect and locali
 ze performance violation events in a timely fashion and with lower probe o
 verhead than prior methods.\n\nBio: Paul Barford an associate professor in
  computer science at the University of Wisconsin-Madison.  He received a B
 S in electrical engineering from the University of Illinois and a PhD in c
 omputer science from Boston University.  He is the founder and director of
  the Wisconsin Advanced Internet Laboratory. His research is focused on de
 veloping new techniques and tools for gathering information on the structu
 re and dynamic behavior of the Internet. He is also focused on developing 
 new methods for protecting networks and systems from malicious attacks\, a
 nd is the founder and CEO of Nemean Networks\, a network security start-up
  company located in the Madison area.  Prof.  \nBarford has authored numer
 ous publications in highly competitive journals and conferences.  His work
  is funded by the NSF\, DHS\, ARO\, NSA and companies including Cisco\, In
 tel\, Sun and others.  He has served on committees of many conferences inc
 luding ACM SIGCOMM\, SIGMETRICS ('10 TPC chair)\, IMC ('06 TPC chair)\, CC
 S and USENIX Security.  He is the Chair of the NSF/GENI Network Measuremen
 t Working Group\, a member of the ACM Internet Measurement Conference stee
 ring committee\, an associate editor of IEEE/ACM Transactions on Networkin
 g\, and a  member of the Board of Directors of the National LambdaRail.\n\
 n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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