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Date:      Wed, 26 Dec 2001 14:29:52 -0800
From:      Ulf Zimmermann <ulf@Alameda.net>
To:        "Peter/Los Angeles, CA" <peter@haloflightleader.net>
Cc:        Sam Drinkard <sam@wa4phy.net>, Allen Landsidel <all@biosys.net>, sthaug@nethelp.no, freebsd-stable@FreeBSD.ORG
Subject:   Re: 4.5 PRERELEASE - Call for testing
Message-ID:  <20011226142952.K90222@seven.alameda.net>
In-Reply-To: <011601c18e5b$cb3b16e0$245b1486@hhlaw.com>; from peter@haloflightleader.net on Wed, Dec 26, 2001 at 02:22:15PM -0800
References:  <Your <5.1.0.14.0.20011226125628.00b08e10@rfnj.org> <5.1.0.14.0.20011226141409.00b02048@rfnj.org> <3C2A45F9.EBF0C148@vortex.wa4phy.net> <011601c18e5b$cb3b16e0$245b1486@hhlaw.com>

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On Wed, Dec 26, 2001 at 02:22:15PM -0800, Peter/Los Angeles, CA wrote:
> Please correct me if I'm wrong, but isn't it kind of strange that
> auto-sensing/auto-negotiating must be enabled on both sides for the feature
> to work a bit strange?
> 
> At home, I have a Netgear FS116, a 16-Port unmanaged switch.  It is
> auto-sensing/full-duplex 10/100Mbits/sec switch.  Therefore, we cannot
> control how it will behave.
> 
> On the other hand, I have network cards on my computer which I can set to
> full/half/auto/10/100, whatever combination I like, and yet, the switch will
> continue to work.
> 
> What I'm getting at is that just because one end is not set to
> auto-negotiate/auto-sense that there will be no communication at all.  Say,
> that one end is set manually, and the other end is automatic.  The automatic
> end will set itself to the parameters of the one that is manually set.  This
> is how my network works.  Thus, I don't believe that both ends, need to be
> set the same way in order to work in this scenario.
> 
> The automatic will automatically negotiate/auto-sense to whatever can't be
> changed, as a result, they work.  Or is this even what you folks are arguing
> about?

I do not know if this is written in the standard, but I have seen devices
where if you turn off AutoNeg, they won't respond at all to the packets.
But I have also seens devices which will still respond, but just to their
fixed setting. I personal prefer it that if I turn off autoneg, it won't
do anything, because that gives you a fixed point. Any production system
I always set switch and host to full 100.

-- 
Regards, Ulf.

---------------------------------------------------------------------
Ulf Zimmermann, 1525 Pacific Ave., Alameda, CA-94501, #: 510-865-0204
You can find my resume at: http://seven.Alameda.net/~ulf/resume.html

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