It does not work at gigabit speeds... it does not negotiate at gigabit but at 100mbit, if I try to force it to gigabit it does not work. Comp has intel gigabit card (Intel 82566MM) which works ok at gigabit speeds with Dell, Cisco, also mikrotik RB450G and RB493G but not with RB2011UAS-2HnD-IN. JF ...