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VMware recently announced the ability to live vMotion a VM from your on-premise datacenter to their cloud service. It appears that they are automating/simplifying some of the L2 subnet stretching that is required to make this work by creating their own tunnel between their gateway VMs. CMU plans to investigate this in more depth to see if this is an ‘easy’ way to get things to the cloud (and back).
Cornell University Example
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Georgia Tech Examples
See: https://www.internet2.edu/blogs/detail/16404