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11-23-2019 05:55 AM - edited 11-23-2019 07:52 AM
I have more than 50 devices ( Z220 Workstation) and all of them with the same Mac-Address..!
What shall I do with this problem ?
All devices Are second hand
No one touched them yet..
NO Systems were installed yet
All devices show in the bios config screen that the Mac-Address is 88:88:88:88:87:88
11-23-2019 10:32 AM - edited 11-23-2019 10:33 AM
It is possible to "spoof" the MAC address of a LOM chipset (Local area network On Motherboard) via the network adapter's software. Check that.
Statistically what you are seeing is impossible for true physically encoded MAC addresses. Yes, more than one device in the world can have the same MAC address, but that is not the case for you. In contrast the encoded BIOS UUID is so complex there is supposed to be only one of each in the universe.
11-23-2019 06:35 PM
I suspect that someone has tried at some point to do a bios or a custom bios flash or bios chip replacement via eprom programer thich has wiped the original mac address
if you can find the label on each board with the correct address you can try a HP bios update using the latest bios and if that fails try the MSI recovery steps on your z220 systems using the link below
last resort is to disable the onboard nic and install a new pci-e network card
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