[K12OSN] network design

steve gilmore stegil at hotmail.com
Tue Feb 8 19:30:00 UTC 2005

If you are looking for doubling up ethernet cards to increase bandwidth 
speed (channel bonding), there is a program i found on the following website 
that does it for you. Just compile and install. It was meant for high speed 
video transfer. " FIREHOSE "

2 x fast ethernet 100mbs -- would create 200mbs throughput   or,
2 x gigabit 1000mbs -- would create 2000mbs throughput.



----- Original Message ----- 
From: "Rita Gibson" <rgibson57 at earthlink.net>
To: "Support list for opensource software in schools." <k12osn at redhat.com>
Sent: Tuesday, February 08, 2005 1:38 PM
Subject: Re: [K12OSN] network design

> Terrell Prudé, Jr. wrote:
>> Paul Satherley wrote:
>>> Sharon Betts wrote:
>>>> Hello everyone -- can I get a discussion going to help me sort out my
>>>> plans?
>>>> I would like some input on my network design.  I have 4 schools and a
>>>> business office; 3000 users; and over 1000 machines (growing by leaps 
>>>> and
>>> LTSP scales to 30 thin-clients per 4G ram and a dual Cpu box..with that 
>>> in mind.
>> That depends on what desktop you have people using, which apps they're 
>> expected to run, etc.  For either GNOME or KDE with OpenOffice.org and 
>> Firefox/Thunderbird (or traditional Mozilla), I'd say between 30 and 40 
>> thin clients is the max.  My dual-proc server with 4GB DRAM handles 25 
>> today and has enough room for another roughly 15 before swapping starts 
>> taking place.  My kids run their choice of GNOME or KDE.
>> On the other hand, if you have the users running, say, IceWM or XFce, you 
>> could probably put more than 40 users on.  If you're talking apps with 
>> few screen updates like OO.o and Moz/Firefox/Tbird, go for it.  If you 
>> have a bunch of people running, say, TuxType, which is known for large 
>> amounts of screen updates, then network bandwidth becomes the bottleneck. 
>> Even a Gig-E card can keep up with only 14 people playing TuxType at 
>> 1024x768x24bit.  That number may rise at lower resolutions; I would 
>> expect it to.  In the TuxType situation, you'd want to use two Gig-E NICs 
>> in your server, ganged together in what Cisco parlance calls an 
>> "EtherChannel" (I think the official term is "multilink").  Then you can 
>> get as many as 28 TuxType users.
> Eli:
> I need to find out how to do this! I think we have one more gigabit port 
> to the lab switches.....
> Rita
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