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Date:      Thu, 08 Oct 1998 05:57:21 -0500
From:      "Jeffrey J. Mountin" <jeff-ml@mountin.net>
To:        Bill Fumerola <billf@chc-chimes.com>
Cc:        freebsd-isp@FreeBSD.ORG
Subject:   Re: IP Load balancing
Message-ID:  <3.0.3.32.19981008055721.00fff15c@207.227.119.2>
In-Reply-To: <Pine.HPP.3.96.981007102658.563A-100000@hp9000.chc-chimes.c om>
References:  <3.0.3.32.19981006220817.00f7f3d4@207.227.119.2>

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At 10:28 AM 10/7/98 -0400, Bill Fumerola wrote:
>>From the bottom up.
>
>Layer 2 - Switching by MAC
>Layer 3 - Switching by IP (router, sorta)
>Layer 4 - Switching by TCP/UDP port, which makes no sense to me.

Maybe it's just me or it's just how it works in a typical net environment,
but for all practical purposes layer 2 and layer3 switching are the same.
Most switches are layer 2, AFAIK.  When running TCP/IP, machines on thet
network use arp to map the IP to the MAC.  Only worth mentioning since
recently I did some checking on what Cicso offered with their various
models and I couldn't find any reference on the differences between layer 2
and layer 3.  Not my money, but paying more for a feature without any
details on the benefits...  Also gives reason to your comment on the layer 3.


Jeff Mountin - Unix Systems TCP/IP networking
jeff@mountin.net

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