In some cases cross release live migration can fail because of a virtual switch configuration issue.
Consider the following scenario:
Consider the following scenario:
- You create a virtual machine on a Windows Server 2012 Hyper-V host, and then link the virtual machine to a virtual switch.
- You try to live migrate the virtual machine from the Windows Server 2012 Hyper-V host to the Windows Server 2012 R2 Hyper-V host, but it has no virtual switch with the same name as the 2012 host.