On May 2, 2012, at 6:32 AM, Shanthini Kannan wrote:
> I am new to OpenMPI.
> Do I definitely need IPoIB for OpenMPI to work?
> If I include RDMA CM to connect my nodes, isn't that sufficient?
It's been quite a while, but IIRC, RDMA CM requires IPoIB.
FWIW: Open MPI actually defaults to using TCP for wiring up IB connections (doesn't have to be TCP over IPoIB -- it can be regular old TCP over Ethernet).
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