AT24MAC402 and AT24MAC602 for EUI48 or EUI64

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I currently started a new larger ethernet project and am just planing so far. I was aware that I need a unique MAC address for each single product. So that would be an EUI48. But what is the EUI64? My application is for industrial ethernet (EtherCat and Profinet for example). The EUI64 seems to be for IPV6 only so I am guessing I would only need the EUI48.


Does anyone have some tips for me to this subject?




Kind regards