Event ID - 12565

Event Id12565
SourceMicrosoft-Windows-Hyper-V-VStack-SynthNic
DescriptionNo available MAC address for "%4" (%3).
Event InformationAccording to Microsoft :
Cause :
This event is logged when MAC address not available.
Resolution :
Change dynamic MAC Address to static MAC address
The default number of dynamic MAC addresses for virtual machines (256) has been exceeded. Turn Off the virtual machine and allocate a static MAC Address, then restart the virtual machine.
Note: Turning off a virtual machine is equivalent to powering off a computer, so data loss is possible.
Verify :
The virtual machine starts and runs network operations without any problems.
Reference LinksEvent ID 12565 from Microsoft-Windows-Hyper-V-VStack-SynthNic

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