5/20/2023 0 Comments Mac id![]() ![]() This bit clear means that the frame is sent to an individual host,Īnd having it set means that it is intended for a group of hosts ![]() The least-significant bit is the I/G (Individual/Group) flag.There are two flags in the most-significant byte of the OUI (Organizationally Unique Identifier, which are the most-significant 24-bits) part of the MAC address: You may notice that two least-significant bits of the most-significant byte of a 48-bit MAC address are usually set to 0 (as in all your examples). I immediately check more than 100 clients on my DHCP server and strangely enough, none ends with an odd number on the first octet - they are always something like: TLDR: While reversing the 7th bit of the MAC OUI to create an EUI-64, the author assumes that the 8th bit is always binary 0. I stumbled upon a piece of code on GitHub: # Generate an EUI64 from the MAC addressĭie "MAC-address \"$"
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