vNetwork Distributed Switch (vDS) proxy switch port is unavailable.
This might occur as part of VM power on, or if the user attempts to connect a VM's vNIC to a dvPortgroup or a dvPort.
The message will contain the vNIC MAC address, the UID of the vDS, and the port number.
Migrate the virtual machine to a different host. If this is a vendor-specific vDS, consult the vendor documentation for this issue.
Refer to the VMware Online Documentation for more information on vCenter event messages and possible solutions.