[K12OSN] Clients freezing, server losing network

[Mathieu Pelletier]

Greetings Everyone,

I am having a problem with my Fedora 13 server and LTSP clients.  My 
server is an AMD Athalon X2 Dual core, with 8 gig memory, 1 terabyte 
striped raid array, and two ethernet cards (1 for clients, and 1 for 
rest of the network; server is also network dhcp server).  My switches, 
unfortunately are only 10/100 until I can upgrade them.  I am running 
around 25 clients which all seem to run without issues.  The clients 
(p4's with about 128mb memory) are running firefox and openoffice using 
ltsp-localapps.  The only exception is that every now and again, the 
clients will freeze.  On the server everything appears okay, i.e. not 
frozen or under extreme load (the load average is somewhere around 0.42 
or so).  However it seems like both network cards (on the server) lose 
their connection for about ten minutes.  I cannot ping my other server 
or any other computer for that matter.  Even if /etc/init.d/network 
restart or ifconfig ethX down/up the cards still do not acquire a 
network connection.  After about ten minutes the network returns and the 
clients unfreeze.  I was wondering if maybe there is a power manager app 
turning off the network cards on the server, but I can't seem to 
determine if this is the cause or not.

Does anyone have any ideas on where I should start looking?  I have run 
dmesg | grep error, etc but I cannot see anything that begins to explain 
my problem.  Any help would be greatly appreciated.

~Cheers!

------------------------------------------------------------------------
Mathieu Pelletier
Biblical Studies Department
Theological College of Zimbabwe

Tel: +263 9 287032/3 Ext: 214
mpelletier at tcz.co.zw <mailto:mpelletier at tcz.co.zw>
www.tczonline.com <http://www.tczonline.com>
Chat Google Talk: mkpelletier Skype: mathieu.pelletier


On 05/12/2010 06:00 PM, k12osn-request wrote:
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>     1. OT: Technology Position Coos Bay Oregon (Joe Burkleo)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Tue, 11 May 2010 17:20:56 -0700
> From: "Joe Burkleo"<joeb at scesd.k12.or.us>
> To:<k12osn at redhat.com>
> Subject: [K12OSN] OT: Technology Position Coos Bay Oregon
> Message-ID:<4BE991F7.0F3C.0098.1 at scesd.k12.or.us>
> Content-Type: text/plain; charset=US-ASCII
>
> Sorry about the off topic posting.
>
> We are looking for a Tech at our ESD here on the Southern Oregon Coast.
>
> http://www.scesd.k12.or.us/current%20job%20postings/09-10-25%20Technology%20Technician%20III.pdf
>
> Thanks,
> Joe
>
>
>
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