Hi, On Wed, Mar 19, 2014 at 05:45:45PM +0100, Lukas Tribus wrote: > >> should work fine. Manually set the interface media type on both sides to > >> be rj-45, and make sure that the cable is a cross-over gigabit: > > > > I wonder. Shouldn't this never be needed for Copper Gbit? > > Its correct that GigabitEthernet mandates autoneg, and it is also correct > that "mdix auto" REQUIRES autoneg, but afaik that doesn't mean all your > gigabit/autoneg gear can also automatically do auto-mdix, because that > probably requires different hardware (switching RX/TX).
There is nothing to "switch". GigE on copper will use all 4 pairs *in both
directions at the same time*, unlike 10/100 (2 pairs, with one for RX only
and one for TX only).
There is something to negotiate - who is master, who is slave, and which
pair on side A goes to which pair on side B.
gert
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