about C2-62-B6 (MAC OUI, not present in the IEEE Public Listing...
RP/0/RSP0/CPU0:frankfurt02#sh int TenGigE0/0/0/0 | in HardwareHardware is TenGigE, address is c062.6bb0.e136 (bia c062.6bb0.e136)
It is Cisco, no doubts
C0-62-6B (hex) CISCO SYSTEMS, INC.
C0626B (base 16) CISCO SYSTEMS, INC.
Mapping IEEE 802 addresses to EUI-64 addresses:
ccccccug cccccccc cccccccc xxxxxxxx xxxxxxxx xxxxxxxx
For link-local address we need to mark it as Localy significant...
Complement the U/L bit (seventh bit of first byte):
The first byte in binary form is 00000000.
When the seventh bit is complemented, it becomes 00000010 (0x02).
u bit – Universally (=0)/Locally (=1) Administered
It is clear that we can use fixed link-local address, but to me not clear why we have this situation when they duplicated somehow... Anyway thank you for your message.