[K12OSN] Re: Networking a new school for K12LTSP?

Petre Scheie petre at maltzen.net
Wed Jan 31 19:41:14 UTC 2007


Terrell Prudé Jr. wrote:
> Robert Arkiletian wrote:
>> On 1/29/07, Joseph Bishay <joseph.bishay at gmail.com> wrote:
>>> Hello,
>>>
>>> I hope you are doing well.
>>>
>>> Thank you all for the comprehensive reply!
>>>
>>> Once I started reading your email, I realized that probably the best
>>> way to proceed was to work with the idea of NIC Bonding or port
>>> trunking.  I have a surplus of Gigabit cards so I could put 3 in a
>>> server (reading online I found that more than 3 wasn't going to give
>>> enough of an improvement due to the PCI bus limitations -- can anyone
>>> validate this?) and then send all 3 of those to the switch. I could
>>> then bond 3 ports from that switch to the next one (we'll probably
>>> have 2 x48 gigabit switches for the whole building -- still counting
>>> the number of ports/computers required) so as to deal with the
>>> bandwidth.  The cost of some of those fiber <-> copper converts look
>>> rather daunting.
>>>
>>> I would VERY MUCH prefer to use only 1 server for the entire building
>>> -- I am still very much a novice at this and the complexities of
>>> setting up multiple servers or splitting into application & /home with
>>> LAPD sounds rather daunting.
>>>
>> If your still set on one server also have a look at this
>> http://k12ltsp.org/mediawiki/index.php/Technical:Subnetting
>> Instead of port trunking I think this would be a better idea.
>> Especially if you are going to have 2 48 port switches that could be
>> on different gigabit linked subnets.
> 
> Hmm...I hadn't thought of that particular application myself--addressing
> bandwidth bottlenecks--but you're right, that sure would do it!  That
> never even occurred to me...thanks!
> 
> --TP
I recall reading somewhere that three gigabit cards is probably the max that the PCI bus 
can handle.  Can anyone confirm or deny this?

(BTW, thanks to Terrell for providing the text of the wiki page on subnetting.)

Petre




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