![]() Cisco mac address range registration#įrom the IEEE registration point of view, there is no particular significance to these blocks (except possibly to those it has allocated to itself). Now, how did the 01-00-5E range end up allocated to the Information Sciences Institute? The simpleĪnswer is that they paid for it. So, really the question should be 'how did the Internet get to use part of the range allocated to ISI?'. The answer is that the IANA used to be run from an office in ISI: specifically IANA was the legendary Jon Postelīottom line: you are on a bit of a fool's errand. ![]() You can distinguish local addresses and multicast addresses, and make some attempt to tie up allocated unicast addresses to vendor blocks. And you can probably do a bit more with well-known multicast addresses but only by tracking down individudal vendor's documentation (IANA is obviously an important one but only definitive for 1 of the 2^22 available blocks). ![]() One of the best places to start is probably the Wireshark codebase. ![]()
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