On (2014-06-11 07:52 +0000), Vitkovský Adam wrote: > Has anyone seen a mac addresses that starts with 4000.3e11.xxxx? 40003e OUI is not registered. But 0x40 on token ring would be 0x02 on ethernet, i.e. first private MAC address, so perhaps someone using locally administered MAC address, but did not know which endianness to use? -- ++ytti