[Beowulf] IB problem/using IB diagnostics

Joe Landman landman at scalableinformatics.com
Thu Jun 18 12:14:30 EDT 2009

Prentice Bisbal wrote:
> One of my nodes has an IB problem:
> --------------------------------------------------------------------------
> WARNING: There is at least on IB HCA found on host 'node36.aurora', but
> there is
> no active ports detected. This is most certainly not what you wanted.
> Check your cables and SM configuration.
> --------------------------------------------------------------------------
> I've been trying to use some of the IB diagnostics tools to diagnose the
> problem, but I can't seem to figure out the correct syntax of the
> commands. On a node that I know is working correctly (the master node):

Sanity check:

   ibnodes or ibhosts report what?

   This will test the connection, session manager, and a few other 
things.  If you get nothing back then things are problematic

   ibdiagnet is also useful for status of the subnets.

Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics,
email: landman at scalableinformatics.com
web  : http://scalableinformatics.com
phone: +1 734 786 8423 x121
fax  : +1 866 888 3112
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