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    SubjectRe: [PATCH net-next] sysfs: add entry to indicate network interfaces with random MAC address
    On 07/20/2010 11:20 PM, David Miller wrote:
    > From: Stephen Hemminger<shemminger@vyatta.com>
    > 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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