correct... cat6 just has higher specs in general.
improper cable wiring order on the RJ45s can kill GBE thou, because of crosstalk.
the wiring spec for the gig-compatible cabling specifies that the green pair is flipped and spread across the blue on the connector. this is standard, but not always adhered to in all cabling assemblies. people that make thier own cables will alot of the times not split the center pairs, causing crosstalk too extreme for anything but the really short cables.
the wiring order i've used with great success with gbe would be:
white orange
orange
green
white blue
blue
white green
white brown
brown
the IEEE engineer I work with says the pairs are split like this to reduce crosstalk and capacitive coupling on the transmit pair of the interface.
wiring without the split, wo/o/wg/g/wbl/bl/wbr/br, [usually] works fine for 100mbit links because only 4 pair are used, the transmit amplitude level is lower, and the frequencies are lower.
when all 8 pairs are used, crosstalk is a major issue and the wiring order must be followed.
hopefully your NICs and switch has a media error counter. look for CRC errors, runts, and other link errors on both the NIC and the switch. if your getting link errors, your cabling is suspect, or your have a bad NIC.
dont forget to turn up the tcp window size now that you have such a fast connection. 0xfaf0 works nicely.
