crossover between gigE?

[Don Bowman]

From: Luigi Rizzo [mailto:rizzo at icir.org]
> 
> On Sat, Dec 20, 2003 at 07:11:22AM -0800, Alfred Perlstein wrote:
> > Any suggestion of the kind of cable one should look for at Frys
> > to run between two gigE card (intel em0) to function as a crossover?
> 
> A straight cable with all 4 pairs wired will work. GigE (and 
> many modern
> 100Mbit switches) have auto polarity detection.
> 
> 	cheers
> 	luigi

One caveat on that: if you force any of the phy parameters
(e.g. speed, duplex), this defeats the auto polarity (MDI/MDX)
detection on em, bge, and maybe others. ie to use the technique 
above you need to have autoselect enabled for duplex and speed.

--don