Messages in this thread |  | | | Date | Wed, 21 Jul 2010 08:47:36 +0200 | | From | Harald Hoyer <> | | Subject | Re: [PATCH net-next] sysfs: add entry to indicate network interfaces with random MAC address |
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On 07/21/2010 08:34 AM, David Miller wrote: > From: Harald Hoyer<harald@redhat.com> > Date: Wed, 21 Jul 2010 08:26:27 +0200 > >> 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 > > So... why doesn't this work?
It works.. but the information, that the MAC is randomly generated would be valuable. So, for the non-random locally assigned MAC (with bit 1), we could easily make persistent rules based on the MAC, instead of completely ignoring them, like we do currently.
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