Great Circle Associates Firewalls
(August 1996)
 

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Subject: Re: huh? switch hitter?
From: Edward Henry Young <us002628 @ interramp . com>
Date: Wed, 21 Aug 96 22:13:23 PDT
To: Bernd Eckenfels <lists @ lina . inka . de>, firewalls @ greatcircle . com

Hi,

> Just as a point of information, you don't necessarily see *less*
> collisions on a loaded network that sustains a high load.
Ah, of course not. It depends on the Connections between the hosts, if u
have:


                               a
                             / | \
                            h1 h2 h3
(- = prefered data path)

Then the load on Port a is the same, with or without a switch, but if you
have:

                    h1-h2
                    h3-h4

You basically double the bandwith of your network with a switch.

With a switch you are providing dedicated bandwidth to a smaller group of uses.  It is basically segmentation with a fast bridge (Store and forward).Cut through switches are a whole other ball of wax with their own problems.  Since a switch is segmenting, the number of collisions **may** be reduced depending if they are caused by a faulty device or overloaded lan.  Some amount of collisions are normal. 

Ed

Greetings
Bernd

-----------------End of Original Message-----------------


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