I spent the last few weeks blogging about the brave new overlay worlds. Time to return to VLAN-based physical reality and revisit one of the challenges of VM mobility: mobile IP addresses.
A while ago I speculated that you might solve inter-subnet VM mobility with Mobile ARP. While Mobile ARP isn’t the best idea ever invented it just might work reasonably well for environments with dozens (not millions) of virtual servers.
Enterasys decided to go down that route and implement host routing in their data center switches. For more details, watch the video from the Enterasys DCI webinar.
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