MAC address in GUI doesn't match what my router sees

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Craig Rich

February 03, 2022 17:57

Hello,

I've had my RainMachine Pro for a couple of months now, connected to my home network over WiFi. Network connection seems fine, but today I noticed a difference in the MAC address shown in the RainMachine UI and what my router thinks it should be.

RainMachine UI shows

MAC Address: 08:be:77:00:93:70

My router shows;

0a:be:77:00:a7:20

Noticed these are very close, looks like a couple of bits off for the first, fifth and sixth digits. And OUI 08:be:77 comes up "Green Electronics" at https://www.wireshark.org/tools/oui-lookup.html, but 0a:be:77 comes up as nothing.

Is this a bug in the UI?

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  RainMachine Nicholas February 10, 2022 10:59

   Both Ethernet and RainMachine access-point interfaces have our MAC class addresses. The interface that actually connects to WiFi gets MAC by deriving from the MAC address of the access-point. That's something hard-coded from the WiFi vendor and we weren't able to change it.

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  Craig Rich February 10, 2022 17:04

  Thanks. I'm still a bit unclear as I'm seeing a *differnet* MAC address in the RainMachine UI as compared to the MAC address that my router reports seeing for the same RainMachine device. I have to trust the router info (as its shows a MAC address that matches the info from other devices in my network), so I'm thinking the UI is mis-reporting the actual RainMachine MAC address in use (the "derived" MAC that you mention). Its more of an annoyance than an actual problem but its unexpected. The only equivalent I can think of is iPhone which generate a "private MAC". Is that what you're doing - creating a private MAC address of sorts?

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  RainMachine Nicholas February 11, 2022 06:57

  Yes adapter tries to do something similar, and we display the "main" interface mac which is the access-point mac that's fixed (written in flash).

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