MAC address confusion

JAKO Andras jako.andras at eik.bme.hu
Sat Feb 28 15:38:14 CST 2009


> http://standards.ieee.org/regauth/oui/oui.txt
> 02-07-01   (hex)		RACAL-DATACOM
> A0-6A-00   (hex)		Verilink Corporation
> 
> In either case two of the lowest or highest bits of 1st octet seems to be
> happily used to assign addresses. What am I missing here?

After enabling DECnet routing, the interface MAC address turns to 
something like this:

GigabitEthernet0/2 is up, line protocol is up
  Hardware is BCM1250 Internal MAC, address is aa00.0400.0a04 (bia 000b.bffd.fc1a)

And you'll find

AA-00-04   (hex)		DIGITAL EQUIPMENT CORPORATION

in the list. I don't know what 02-07-01 is, but I guess that could be 
something similar: The OUI belongs to a company, but they don't use the 
addresses to burn them into interface cards.

Andras




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