I've written post there: viewtopic.php?p=1128899#p1128899 and I quote it here just to keep discussion in one thread
Addresses can either be universally administered addresses (UAA) or locally administered addresses (LAA).
To define LAA MAC the U/L bit of the first octet (bit 1 ) has to be set to 1.
To define Unicast packet the I/G bit of the first octet (bit 0) has to be set to 0 - we need unicast as we expect one-to-one communication with the bridge be possible.
Therefore the first octet should be formatted as ( b=0|1):
bbbbbb10
that gives us 4 posiible types of MAC groups
x2-xx-xx-xx-xx-xx
x6-xx-xx-xx-xx-xx
xA-xx-xx-xx-xx-xx
xE-xx-xx-xx-xx-xx
I prefer using EE as the first octet as it clearly shows that MAC address is "unusual" however it's only a matter of "visual taste". Any other combination is also good.
EDIT:
It should be considered if the "highest" 'EE' octet should be used or the "lowest" '02' as if STP comes into play then it has to be chosen properly
Statistics: Posted by BartoszP — Tue Feb 25, 2025 4:50 pm