On 13 September 2012 18:47, Mark Beharrell <[email protected]> wrote:
> Do you have the same interface card(s) and driver versions on your local > system?? I would suspect a driver problem? > > Mark Beharrell > On Sep 13, 2012 10:47 AM, "Derek Smithies" <[email protected]> > wrote: > >> Hi, >> No activity for some time, so I thought I would kick things off with a >> question. >> Any suggestions (including shell commands) are welcome.. >> >> I have a problematic box on a customers site in the US. it is not going >> to be easy to get physical access. SSH access is doable. >> >> I have been writing software for a guy in the US - in which the server >> maintains 20 concurrent TCP connections, >> there will be as many UDP streams. Most of the UDP stream are inactive at >> any given point in time. Usually - there are >> no UDP flows - or 4 UDP flows. Sometimes 8 or 12 UDP streams. >> >> The TCP connections are the control information to start/stop the voice >> streams. >> The UDP streams are voice streams. >> This is a non standard variant on IAX2 - a better variant, but that is >> another discussion. >> >> This particular software is running on a centos 5.2 box. There are >> hundreds of installations using this software in the states... >> >> One customer has a cable modem (which is something like an ADSL box >> without a NAT) and then a Belkin router (which is a NAT+wireless access >> point+lots of ethernet ports for the lan side). The connection to the >> public internet is via a 3G type link that has a mtu of 1000. >> Not sure on the exact specifics of the internet connection - the >> description made no sense to me. >> >> The customer has reported kernel panics - many of them. >> >> Memory checks? yes. Replaced all memory sticks with nice proper good >> verified memory.. >> >> Program faults? This program is running fine on all other installations - >> kernel panics have not been reported before. >> >> CPU overload. No. loadavg is < 1, cpu busy percentage is 20%. >> >> I am not installing mrtg (or similar) tool on this box. >> >> ping tests are ok - you can ssh into this box on his site. Most of the >> time, the box works fine and conveys all voice data, >> all web traffic, all TCP commands just fine... except for these kernel >> panics. Now, the sad part of the whole diagnostic >> process is that I am not seeing the kernel panics in front of me. The >> customer reports the kernel panics to the guy >> I have been working for, who then reports them to me. >> > I'd suspect a hardware problem too, especially as it has been particularly warm in parts of the Northern hemisphere. If you were to install the lm_sensors package you can get a list of various temperature readings. http://www.linuxquestions.org/questions/linux-server-73/how-to-check-cpu-temp-from-command-line-as-root-user-4175418632/ -- Sincerely, Christopher Sawtell
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