On 5/08/19 12:07 AM, tomas@tuxteam.de wrote: > On Sun, Aug 04, 2019 at 12:58:14PM +0100, mick crane wrote: > >> what sort of cable ? >> If ethernet, machine to machine directly seem to recall you might >> want a cross over cable. >> Can chop cable in two and connect the >> red to green, >> green to red, >> red stripy to green stripy >> green stripy to red stripy >> ....I think. > > Ethernet crossover is pretty much defunct [1]. > > These days (> 1998) most Ethernet hardware can sort this out > automatically (called Auto MDI-X [2]). So unless you are using > historical hardware, this is a non-issue. Still, for people > in contact with old hardware, it is a good skill to have :-) > > Cheers > > [1] https://en.wikipedia.org/wiki/Ethernet_crossover_cable#Automatic_crossover > [2] https://en.wikipedia.org/wiki/Medium_Dependent_Interface#Auto_MDI-X And if you are making a crossover, I wouldn't rely on the colours - there's multiple correct options for those. And none of the colours is red :-) And as for cutting and joining - you're going to get a pretty awful cable that way, and unreliable at speed. Better to cut one plug off and put a new one on, but that requires a plug and crimper. But as Tomas says, if either end is remotely recent, it's a non-issue. Richard
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