Multiple MACs on a single NIC

Jeff Vian jvian10 at
Sun Jul 11 18:49:06 UTC 2004

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.

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