RE: crossover between gigE?

From: Don Bowman (don_at_sandvine.com)
Date: 12/21/03

  • Next message: David Gilbert: "crossover between gigE?" 
    To: 'Luigi Rizzo' <rizzo@icir.org>, Alfred Perlstein <bright@mu.org>
Date: Sat, 20 Dec 2003 18:56:25 -0500

    From: Luigi Rizzo [mailto:rizzo@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
    _______________________________________________
    freebsd-net@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-net
    To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"

  • Next message: David Gilbert: "crossover between gigE?"