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SUMMARY:Experiments with dynamic networks of virtual routers - Richard G. 
 Clegg (UCL)
DTSTART:20111124T160000Z
DTEND:20111124T170000Z
UID:TALK34741@talks.cam.ac.uk
CONTACT:23487
DESCRIPTION:In many modern networking contexts\, nodes and links are highl
 y\ndynamic. Network nodes and links may start or stop with little notice. 
 Such\ncontexts include virtual networks\, cloud computing\, MANE Ts\, sens
 or networks\nand Internet of Things. Simulation can provide highly scalabl
 e results but\nthe realism o a simulation may be uncertain. System virtual
  machines (Xen\,\nQEMU \, VMWare and similar) can provide accurate results
  (for some type of\nnetwork) but it is hard to get scalable results withou
 t a large number of\nphysical machines. In this work we develop and tests 
 a half-way house:\nsoftware routers which exist within Java Virtual Machin
 es\, exchange routing\ntables\, provide a socket-like interface and route 
 data in a realistic way.\nThis enables larger scale tests on testbeds with
  the same number of physical\nmachines.\n\nInitial experiments have looked
  at the problem of selecting nodes to be\nmanagement/monitoring nodes with
 in a dynamic network. Such nodes should be\nselected for their position in
  the network (to be "close" to the nodes they\nmonitor) but also for their
  longevity. This gives some degree of trade-off\nbetween "stable" nodes an
 d "well-positioned" nodes. An algorithm is given\nwith a tunable parameter
  for making this trade off.\n\nBio: Richard Clegg is a Senior Research Fel
 low at University College London.\nHis PhD in Mathematics and Statistics w
 as obtained from the University of\nYork in 2005. His research interests i
 nclude network traffic statistics\,\nnetwork topologies\, overlay networks
  and network economics.
LOCATION:FW26\, Computer Lab\, 15 JJ Thomson Avenue\, Cambridge
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