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Event ID 12565 — NIC Configuration

Applies To: Windows Server 2008

This is preliminary documentation and subject to change.

This Aspect refers to network switchport, static and dynamic MAC address issues.

Event Details

Product: Windows Operating System
ID: 12565
Source: Microsoft-Windows-Hyper-V-Worker
Version: 6.0
Symbolic Name: VM_NIC_NO_AVAILABLE_MAC_SUMMARY
Message: No available MAC address for %4 (%3)

Resolve

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.

NIC Configuration

Hyper-V