Question regarding MAC address
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hello i am using firmware version 3.4beta 3 but now i am update firmware to 3.4beta 5 so mac address is changed but i am using same board is it possible that MAC address will changed??.
->MAC for beta3 is=be:7b:50:3e:51:37
->MAC for beta5 is=be:4e:50:3e:51:37 -
@user-m_123 yes, its in the change notes
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@jay_s_uk ok
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Strange, I always thought that mac addresses are hard coded to the particular device and there was no way of changing it. (yes it can be temporarily overwritten via software)
Do you have a link to that change note (I was unable to find it)
The reason I am curious is because my printers are assigned IP numbers based on their MAC address and I can see holy hell happening if MAC id's are changed nilly willy .... -
@jens55 https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-RC#reprapfirmware-340rc1 penultimate bullet under the first list under that heading.
MAC addresses are less immutable than most people think. Some routers hold it only in firmware and there's no hard-coding / burning into hardware. They aren't unique either - manufacturers can recycle them. The uniqueness and immutability is more custom than standards, I believe.
Having said which, it is pretty well observed custom, so I assume there's a good reason for the changes it in this case.
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@achrn the change was it wasn't calculating the MAC address correctly, allowing 2 or more of the same device on a network having the same MAC address
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@achrn, thanks for link and explanation ..... most interesting!
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undefined dc42 marked this topic as a question 16 Feb 2022, 15:29
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undefined dc42 has marked this topic as solved 16 Feb 2022, 15:30
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