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10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 3:08 pm
by sdynes
Hi, I just got a batch of new Raspberry Pi 3B+ devices, 5 devices in total. We installed Win10 IoT onto them and started connecting them to our network and found that they ALL have the same MAC address. Not sure what happen but is there a way to get these fixed?

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 3:24 pm
by RaTTuS
load up raspbain and see what MAC they say there

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 3:43 pm
by jamesh
RaTTuS wrote:
Wed Mar 20, 2019 3:24 pm
load up raspbain and see what MAC they say there
I do have some slight recollection of MAC address on IoT being all the same, but might have been dreaming...

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 4:04 pm
by Andyroo
You used to be able to set the MAC address in the registry but I cannot remember if IOT carried this through (and I ain’t going back to play)...

You do a registry check to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\0001

With a key of
"NetworkAddress"

And pop the new value in here WITHOUT colons.

It may be worth checking from Powershell if you have this key in the image and either taking it out or changing it.

Technically you could have machines with the same MAC but it’s just about statistically impossible (unless the manufacturing side had a big glitch)...

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 5:47 pm
by W. H. Heydt
Andyroo wrote:
Wed Mar 20, 2019 4:04 pm
Technically you could have machines with the same MAC but it’s just about statistically impossible (unless the manufacturing side had a big glitch)...
Two with the same (hardware) MAC address is unlikely in such a small order, but certainly not beyond credibility. Having 5 with the same MAC address is ridiculous. I'd look to the Win10IoT software for the reason for this.

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 5:59 pm
by Heater
I will wager the hardware MAC addresses are different. Windows is playing silly buggers with them.

I'm still wondering how you could get 10 identical Pi out of "5 devices in total".

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 6:58 pm
by rpdom
Heater wrote:
Wed Mar 20, 2019 5:59 pm
I'm still wondering how you could get 10 identical Pi out of "5 devices in total".
Possibly the subject might have been "Win 10 Pi Devices..."?

Re: 10 Pi Devices - all have same MAC Address

Posted: Wed Mar 20, 2019 10:03 pm
by Paeryn
rpdom wrote:
Wed Mar 20, 2019 6:58 pm
Heater wrote:
Wed Mar 20, 2019 5:59 pm
I'm still wondering how you could get 10 identical Pi out of "5 devices in total".
Possibly the subject might have been "Win 10 Pi Devices..."?
Or they meant that both the WiFi and Ethernet on each RPi also had the same MAC address, that would definitely point to being a Win10 IoT software issue.

Re: 10 Pi Devices - all have same MAC Address

Posted: Thu Mar 21, 2019 4:51 am
by Heater
Paeryn,
Or they meant that both the WiFi and Ethernet on each RPi also had the same MAC address, ...
Good point.

Suggest upgrading to an OS more suitable for the Pi, and computers in general.

Re: 10 Pi Devices - all have same MAC Address

Posted: Thu Mar 21, 2019 5:24 am
by HawaiianPi
Heater wrote:
Thu Mar 21, 2019 4:51 am
Suggest upgrading to an OS more suitable for the Pi, and computers in general.
You mean Windows isn't the only OS?

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