Virtual Machine Conditions and Limitations for vMotion in the vSphere Web Client
To successfully migrate virtual machines with vMotion, the virtual machine must meet certain network, disk, CPU, USB, and other device requirements.
The following virtual machine conditions and limitations apply:
The source and destination management network IP address families must match. You cannot migrate a virtual machine from a host that is registered to vCenter Server with an IPv4 address to a host that is registered with an IPv6 address.
If virtual CPU performance counters are enabled, you can migrate virtual machines only to hosts that have compatible CPU performance counters.
Need ans of 2nd point in simple language.....
You can migrate virtual machines with USB devices that are connected to a physical USB device on the host. You must enable the devices for vMotion.
Please explain 4th and 5th point which i can understand easily.
You cannot use migration with vMotion to migrate a virtual machine that uses a virtual device backed by a device that is not accessible on the destination host. For example, you cannot migrate a virtual machine with a CD drive backed by the physical CD drive on the source host. Disconnect these devices before you migrate the virtual machine.
You cannot use migration with vMotion to migrate a virtual machine that uses a virtual device backed by a device on the client computer. Disconnect these devices before you migrate the virtual machine.