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Date:      Sun, 10 Sep 2000 15:24:18 -0400
From:      Mike <mike@mikesweb.com>
To:        sthaug@nethelp.no
Cc:        wizard@sybaweb.co.za, freebsd-isp@FreeBSD.ORG
Subject:   Re: NIC settings
Message-ID:  <4.3.2.7.2.20000910152245.00b83240@mail.mikesweb.com>
In-Reply-To: <15368.968613173@verdi.nethelp.no>
References:  <Your message of "Sun, 10 Sep 2000 15:07:22 -0400"> <4.3.2.7.2.20000910150718.00b3b530@mail.mikesweb.com>

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My reasoning was because of all the collisions, data packets were being 
resent at a high rate, filling up my T1s quicker, and causing a lot of 
interface resets on my router. When I went to a switch, I noticed about a 
10% decrease in network traffic..

At 09:12 PM 9/10/2000 +0200, sthaug@nethelp.no wrote:
> > Actually, switching to half duplex won't really help you a whole lot.. I
> > had a 10mb hub that had the collision light almost always on. If you want
> > to stop the collisions you'll want to replace your hub with a switch.
>
>Why on earth do you want to stop the collisions? Collisions are *normal*
>and *expected* when you use half duplex Ethernet. Collisions seldom matter,
>performance does. As Rich Seifert puts it,
>
> > A major preoccupation with network administrators these days seems to be
> > monitoring and worrying about the number of collisions seen on Ethernet
> > networks. There is a great deal of folklore and voodoo concerning what
> > is an "acceptable" collision rate or collision percentage, and when is
> > the network "broken" or on the verge of collapse. Except in the most
> > extreme of circumstances (all of which are observable through other,
> > better metrics), the number of collisions seen on a network in an
> > uninteresting and misleading statistic.
>
>(If you don't know who Rich Seifert is, check out comp.dcom.lans.ethernet.)
>
>Steinar Haug, Nethelp consulting, sthaug@nethelp.no
>
>
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