switch:~# ethtool -m swp12
	Identifier                                : 0x03 (SFP)
	Extended identifier                       : 0x04 (GBIC/SFP defined by 2-wire interface ID)
	Connector                                 : 0x07 (LC)
[...]
	Length (SMF,km)                           : 0km
	Length (SMF)                              : 0m
	Length (50um)                             : 0m
	Length (62.5um)                           : 0m
	Length (Copper)                           : 10m
	Length (OM3)                              : 70m
	Laser wavelength                          : 850nm

Hmm, a the 850nm optic can do 10 meters over copper I see... Sure I guess