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SUMMARY:Experiments with dynamic networks of virtual routers - Richard G. 
 Clegg (UCL)
DTSTART:20111124T160000Z
DTEND:20111124T170000Z
UID:TALK33178@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:In many modern networking contexts\, nodes and links are highl
 y dynamic.  \nNetwork nodes and links may start or stop with little notice
 .  Such contexts include virtual networks\, cloud computing\, MANETs\, sen
 sor networks and Internet of Things.  Simulation can provide highly scalab
 le results but the realism o a simulation may be uncertain.  System virtua
 l machines (Xen\, QEMU\, VMWare and similar) can provide accurate results 
 (for some type of network) but it is hard to get scalable results without 
 a large number of physical machines.  In this work we develop and tests a 
 half-way house: software routers which exist within Java Virtual Machines\
 , exchange routing tables\, provide a socket-like interface and route data
  in a realistic way.  This enables larger scale tests on testbeds with the
  same number of physical machines.\n\nInitial experiments have looked at t
 he problem of selecting nodes to be management/monitoring nodes within a d
 ynamic network.  Such nodes should be selected for their position in the n
 etwork (to be "close" to the nodes they monitor) but also for their longev
 ity.  This gives some degree of trade-off between "stable" nodes and "well
 -positioned" nodes.  \nAn algorithm is given with a tunable parameter for 
 making this trade off.\n\nBio: Richard Clegg is a Senior Research Fellow a
 t University College London.  \nHis PhD in Mathematics and Statistics was 
 obtained from the University of York in 2005.  His research interests incl
 ude network traffic statistics\, network topologies\, overlay networks and
  network economics.\n\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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