During the standard upgrade of 6.7 vSphere to 7.0. Step 1 requires the deployment of a new vSphere instance. All goes through well until the start of the deployment, never reaching past 0% erroring out with the following message: Failed to send file [disk-0.vmdk] to the host [plumbus.cloud], please check the network connection. I have attached the log for reference. Has anyone else come across this issue?
Are you using vSAN datastore ? To avoid such network issue, can you try to place the source 6.7 and destination 7.0 on the same ESXi host and then retry the VC upgrade.
the answer is in the DNS settings (it appears several times in the log)
DNS is not resolved to IPv4: Error: queryA ENOTFOUND hcomposer.ronin.local
try to correct DNS settings of the server from where you launch the installer