Re: [PATCH net-next] sysfs: add entry to indicate network interfaceswith random MAC address

[Harald Hoyer]

On 07/20/2010 11:20 PM, David Miller wrote:
> From: Stephen Hemminger<shemminger@xxxxxxxxxx>
> Date: Tue, 20 Jul 2010 14:18:16 -0700
>
> > No one mentioned that the first octet of an Ethernet address already
> > indicates "software generated" Ethernet address. Per the standard,
> > if bit 1 is set it means address is locally assigned.
> >
> > static inline bool is_locally_assigned_ether(const u8 *addr)
> > {
> > 	return (addr[0]&  0x2) != 0;
> > }
>
> W00t!
>
> Indeed, can udev just use that?  :-)

It already does:
see /lib/udev/rules.d/75-persistent-net-generator.rules
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