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Date:      Sun, 10 Sep 2000 21:12:53 +0200
From:      sthaug@nethelp.no
To:        mike@mikesweb.com
Cc:        wizard@sybaweb.co.za, freebsd-isp@FreeBSD.ORG
Subject:   Re: NIC settings
Message-ID:  <15368.968613173@verdi.nethelp.no>
In-Reply-To: Your message of "Sun, 10 Sep 2000 15:07:22 -0400"
References:  <4.3.2.7.2.20000910150718.00b3b530@mail.mikesweb.com>

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> 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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