Hello,
I currently have a vCenter and ESxi in version 5.1.
I just deployed a new vCenter and ESxi in versions 7.0
One option would be to export those VMs to ova and then import them to the new vcenter.
But I would like to know if it is feasible to add those vCenter 5.1 nodes to the new vCenter 7.0 cluster and then with a vmotion move those VMs to the new ESxi 7.0