I thought I would show off another small project.
It’s a 2K I2C EUI-48 MAC EEPROM from Microchip. http://www.microchip.com/wwwproducts/Devices.aspx?product=24AA02E48 It plugs into an “I” socket but passes through all the signals so the socket can still be used for other items.
(It would be nice if GHI included the $.20 piece on the boards with built in Ethernet as a unique MAC is required.)
@ skeller - Nice design. Looks super easy to use too. Given the write protected 6-byte EUI-48 code, this could be good for other GUID-type requirements such as CAN bus node identification.
@ Jay Jay - Thanks for fixing the link. I will clean up my code for reading the MAC and post it. Its pretty straight forward.
@ Rajesh - GHI does have a OUI - 00:21:03. I wasn’t aware that they could assign them but I assume that it is on a custom/quantity bases. To my knowledge, someone correct me if I am wrong, none of the main boards come with a true hardware MAC address.