We are running ESXi 6 Update 2 host and need to upgrade our VMware hardware version from 7 to 11 on our older VM's. We have using VMtools versions 10.2. I have read the proper upgrade sequence is Vmtools then Vmware hardware. What we have found if that when upgrading Vmtools version to 10.2 on VM's running hardware version 7 would wipe the network settings in some cases. We contacted Vmware support and they stated we should upgrade the Vmware hardware firt. We have a couple hundred Vms to upgrade which are are spread across different clusters and host but all under the same vcenter server.