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What is Network Virtualization

Brad Hedlund wrote another great article, this one explaining the fundamentals of network virtualization. As you'll see, VMware (and everyone else) aims way higher than replacing VLANs with overlay networks. Highly recommended!

2 comments:

  1. I think that there will be a high performance hit when a physical network is converted to a virtualized. Because it means 'virtual' L2 frames to go packed over real L3 frames, which go over real L2 frames. Well, try to send something larger over something smaller. What happens ? Yes - fragmentation. Also you'll have to send 2xL2 frame headers + 2xL3 Frame headers (total 4) for one 'virtual' L2 frame. What finally will this cause - you to spend a lot more to buy faster cards, high end equipment....

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