Re: crossover between gigE?
On Sat, 20 Dec 2003, 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? GigE uses all 8, so: 1 ---> 3 2 ---> 6 3 ---> 1 4 ---> 7 5 ---> 8 6 ---> 2 7 ---> 4 8 ---> 5 -Mitch ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: crossover between gigE?
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 > -- > - Alfred Perlstein > - Research Engineering Development Inc. > - email: [EMAIL PROTECTED] cell: 408-480-4684 > ___ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "[EMAIL PROTECTED]" ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: crossover between gigE?
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? I was under the impression that copper gigE cards were auto-sensing for polarity and it didn't matter whether you use a straight or crossover. -- "Well," Brahma said, "even after ten thousand explanations, a fool is no wiser, but an intelligent man requires only two thousand five hundred." - The Mahabharata ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
RE: crossover between gigE?
From: Luigi Rizzo [mailto:[EMAIL PROTECTED] > > 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 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
thanks all (was: Re: crossover between gigE?)
I had a cat5e cable, but either: a) the box needed to reboot b) 4.9 has a problem whereas 4-stable post 4.9 is ok with em0 I dunno, but it's working with a standard cat5e cable now after the upgrade. * Michael Sierchio <[EMAIL PROTECTED]> [031220 14:13] wrote: > 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? > > > > > > I was under the impression that copper gigE cards were auto-sensing > for polarity and it didn't matter whether you use a straight or crossover. > > -- > > "Well," Brahma said, "even after ten thousand explanations, a fool is no > wiser, but an intelligent man requires only two thousand five hundred." > - The Mahabharata -- - Alfred Perlstein - Research Engineering Development Inc. - email: [EMAIL PROTECTED] cell: 408-480-4684 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
