I did not quite get the "uniqueness" part of the EUI-64 addressing. The second bit from the right (in the first byte) is used for that. OK. Now, Joe said something like we need to invert that bit to get a unique address. On the EUI-64 slide there's a note that says if this bit is equal to 1, than we have a unique address.
My question is: what is the rule of getting the unique address? Just the bit flipping operation, or this bit has to be equal to 1? And I don't quite get this way of getting a unique address. The first three bytes of any mac address are specific for the NIC manufacturers. What is the purpose of this invertion process then? Also, since we are getting new address from the existing mac address, what happens if that bit is equal to 1 in the mac address? If we flip it, we will get 0 as a result. Or maybe that bit could never be equal to 1 in any possible mac address? I don't know the rules for creating mac addresses, so... ? Best Regards, Bojan Zivancevic Network Engineer ---- Comutel d.o.o. Omladinskih brigada 65v 11070 Belgrade SERBIA Tel: +381 11 217 8000 Ext.109 Mob: +381 64 646 8401 Fax: +381 11 2164641 http://www.comutel.co.rs<http://www.comutel.co.rs/>
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