Wierd Windows Virtual PC guest OS behaviour (routing, pinging, etc.)

So, if you end up with Windows VM’s that were copied (not imported), you can end up with the same MAC Addresses. This can lead to ‘wierd’ behaviour if Windows Virtual Machines/Guests are on the same network and you will get intermittent (and often unexplainable) behaviour in regards to connecting, pinging, routing, whatever.

To fix:

1. Down the VM

2. Find the ‘ethernet_card_address_type’ in the VM’s VMC file – such as… 0003FFxxxxxx

3. Remove the number so the line appears as follows:

4. After you remove the number, Virtual Server will create a new MAC address the next time you start the virtual machine.
Karel, cc’d you for your notes as although today was a little different, the problem/fix described above is what we had to deal with a few weeks ago and I imagine there might be a few VM’s floating around the office based on that original copy.

Reference: https://technet2.microsoft.com/windowsserver/en/library/8f68598a-95e0-402d-b22b-c34db68397b41033.mspx?mfr=true

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