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Date:      Wed, 26 Dec 2001 20:57:46 +0100
From:      Wilko Bulte <wkb@freebie.xs4all.nl>
To:        sthaug@nethelp.no
Cc:        all@biosys.net, freebsd-stable@FreeBSD.ORG
Subject:   Re: 4.5 PRERELEASE - Call for testing
Message-ID:  <20011226205746.A15083@freebie.xs4all.nl>
In-Reply-To: <4183.1009396491@verdi.nethelp.no>; from sthaug@nethelp.no on Wed, Dec 26, 2001 at 08:54:51PM %2B0100
References:  <5.1.0.14.0.20011226141409.00b02048@rfnj.org> <4183.1009396491@verdi.nethelp.no>

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On Wed, Dec 26, 2001 at 08:54:51PM +0100, sthaug@nethelp.no wrote:
> > >Please don't try to claim that this doesn't happen. It does - even with
> > >new equipment from well known manufacturers.
> > 
> > I'll claim I've never seen it so long as I was using auto-negotiating 
> > devices.. nics from linksys, 3com, intel and others.. switches and hubs 
> > from the same three.
> 
> Good for you. I (and my co-workers) haven't been nearly as lucky.

Neither have I, please allow me a another question.

> The speed is not a problem. The duplex configuration is.
> 
> What I (and I believe Tom) is saying is that if you have such a device,
> and you force the NIC connected to it to a certain duplex setting, it may
> work (both ends get the same duplex setting), or it may not. When it does
> *not* work, you have a duplex mismatch - which means that many packets
> will get through, but you'll have a significantly higher rate of errors
> than normal, in the form of late collisions etc.

Can one expect two 10/100 switches to "agree" on a common duplex and speed
setting? In my experience in some cases connecting two switches will plain
not work at all. 

Appreciate your expertise here

Wilko

-- 
|   / o / /_  _   		email: 	wilko@FreeBSD.org
|/|/ / / /(  (_)  Bulte		Arnhem, The Netherlands	

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