The x4100m2 is a wierd beast compared to the x4100. The x4100 just has
4 intel e1000g interfaces. The x4100m2 has 2 intel e1000g interfaces,
and two nvidia interfaces (looks like each of a different type). It has
been said elsewhere that the nvidia ethernet (on the x2100 at least) is
pretty crappy.

Anyone have any comments about which should be the preferred interface
to use on an x4100m2? The port labeled "net 0" is an nvidia interface.