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SUMMARY:Why SHIM6 is likely to fail - Richard Clayton (University of Cambr
 idge)
DTSTART:20091110T130000Z
DTEND:20091110T134500Z
UID:TALK21344@talks.cam.ac.uk
CONTACT:Stephen Kell
DESCRIPTION:Companies seeking to ensure that their Internet connection is 
 resilient often purchase services from multiple providers. This leads them
  inexorably towards having their IP address range visible in the global ro
 uting table\, increasing the resource usage of every Internet router at a 
 cost of perhaps $77K/prefix. Since in practice this is essentially "free"\
 , yet impacts the cost and stability of every router in the world\, this i
 s a classic "tragedy of the commons".\n\nThere is little prospect of chang
 e in the IPv4 world\, but there is a chance to fix the problem as IPv6 is 
 rolled out. Unfortunately\, SHIM6\, the engineering solution chosen to sol
 ve this issue in IPv6\, will only be effective if universally adopted\, an
 d there are no short-term incentives to prefer SHIM6 over a duplication of
  the IPv4 arrangements.\n\nNetwork protocol designers now generally unders
 tand that technical elegance is not enough -- you need to build in securit
 y properties from the outset. However\, it is also necessary to consider t
 he economic incentives for deploying your system.\n\nPaper from WEIS 2009:
  http://www.cl.cam.ac.uk/~rnc1/shim6.pdf 
LOCATION:Computer Laboratory\, William Gates Building\, Room FW11
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