How can I prevent udevd from renaming eth0 to em1

[Bruno Wolff III]

On Sun, Oct 21, 2012 at 13:43:17 -0400,
   "Michael H. Warfield" <mhw at WittsEnd.com> wrote:
>
>Now that being said, there's still some notable differences.  Most of my
>machines (some F16 and some F17, some i686 and some x86_64) came up with
>p2p1 for interface names and his is coming up em1.  Obviously something

em1 would be the first embedded nic. Probably its built into the motherboard.
p2p1 is a nic attached to the pic bus. I think its the second slot, first port.
(Probably the card has only one port, but some have more than one.)