We have a small cluster (head node + 4 nodes with 16 cores) using Intel infiniband. This cluster is under CentOS 6.6 (with the kernel of CentOS 6.5).
On this cluster Intel Parallel Studio XE 2015 is installed. I_MPI_FABRICS is set per default to "tmi" only.
When I start a job (using torque+maui) on several nodes, for example this one: