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Date: Tue, 27 Feb 2007 13:49:41 -0800 From: "H. Peter Anvin" <hpa@...or.com> To: "Petri T. Koistinen" <petri.koistinen@....fi> CC: netdev@...r.kernel.org, ShuChen <shuchen@...ltek.com.tw>, linux-kernel@...r.kernel.org Subject: Re: D-Link DGE-528T (r8159) autonegotation of 1000 Mbps link does not work Petri T. Koistinen wrote: > Hi! > > I just brought two D-Link DGE-528T (uses r8159 driver) network adapters > to have nice 1 Gbps home network between two computers. > > I have gigabit crossover cable that is connected like this... > > Pin Connector #1 Connector #2 > 1 white/orange white/green > 2 orange green > 3 white/green white/orange > 4 blue white/brown > 5 white/blue brown > 6 green orange > 7 white/brown blue > 8 brown white/blue > (from: http://logout.sh/computers/net/gigabit/) That's just plain screwy. Gigabit doesn't use crossover cables *AT ALL*, although some of them *tolerate* the green and orange pairs being crossed for compatibility with older crossover cables. However, the cable above is just plain weird. There is absolutely no reason to cross the blue and brown pair. If you know both ends are gigabit, always use a straight-through cable. If you know at least one end is gigabit (or auto MDI/MDIX), you can almost always use a straight-through cable as well. Use crossover cables for 10/100 equipment only. -hpa - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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