On Thu, Dec 5, 2013 at 10:37 AM, Stephan Wiesand
<[log in to unmask]> wrote:
> On Dec 5, 2013, at 18:51 , Orion Poplawski wrote:
>
>> I'm seeing some very strange behavior on one of our storage servers recently, and am wondering if anyone else has been experiencing similar issues.  I think it may be related to InfiniBand somehow, but not sure.  Unfortunately there are no error messages in the logs of any kind.  But network traffic out of one or more interfaces just stops, or some traffic (ping e.g.) will work, but ssh/tcp won't.
>>
>> Seen with both 2.6.32-431 and 2.6.32-358.23.2, and I think 2.6.32-220.23.1.
>
>
> Not observed here, including on ~160 systems with IB. But then we have no systems running -431 yet, few running -358.23.2, and none running kernels as old as -220.x.y. Most are on -358.x.y.
>
> Thought it might still be a useful data point.

Speaking of a data point ... this may not be directly related to the
problem described by the OP but just a heads up. The -431 kernel in
EL6.5 is known to cause network issues in _certain_ hardware. You can
find more details in:

http://bugs.centos.org/view.php?id=6810

Akemi