Multiple MACs on a single NIC

[Jeff Vian]

On Sun, 2004-07-11 at 02:47, Donald Ray Lott wrote:
> MAC are embedded into each NIC. Each company/brand has it's own
> numbering prefix and every NIC number is surposed to be unique. No other
> NIC in the world will have another NIC's MAC.
> 

This is "in fact" true (hardware wise).
However, Linux allows the network interface to masquerade with a
different mac address than the physical embedded address.

Another point of fact though, is that a NIC can never have more than one
MAC address at a time, regardless of whether it is the physical address
or the masqueraded one.