I was talking to a friend a few days ago who is the owner of a pretty big sized vSphere 4 environment. His network team is in the middle of upgrading switches which requires some outage (30 sec+) on his management network for the ESXi hosts. He wanted to discuss the best possible way to approach this without disrupting the environment and causing an outage for the VMs. Keep in mind the VMs network will continue to run and is not expected to go down. Read more..
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