I installed RedHat 7.5 on two machines with the following Mellanox cards:
87:00.0 Network controller: Mellanox Technologies MT27520 Family [ConnectX-3 Pro
I followed the steps outlined here to verify RDMA is working:
However, I cannot seem to get Open MPI 3.0.2 to work. When I run it, I get this error:
No OpenFabrics connection schemes reported that they were able to be
used on a specific port. As such, the openib BTL (OpenFabrics
support) will be disabled for this port.
Local host: lustwzb34
Local device: mlx4_0
Local port: 1
CPCs attempted: rdmacm, udcm
Then it just hangs till I press control C.
I understand this may be in issue with RedHat or Open MPI or Mellanox… Any ideas to debug which place it could be?