I’m troubleshooting my previous problems (https://community.mellanox.com/s/question/0D51T00007TopADSAZ/openmpi-not-finding-the-device) step-by-step albeit in a different system. I’ve tried MOFED 5.0-220.127.116.11-ubuntu18.04-x86_64 & 5.0-18.104.22.168-ubuntu18.04-x86_64 but both seem to disable the IB network (attached are screenshots before and after). After installing MOFED, I restart the driver (/etc/init.d/openibd restart) that unloads and loads it as expected. However, it cannot load any MST device and starting it doesn’t work. After it, I checked the system network but the IB is disabled. However, I don’t know why this is happening, any suggestion on might be disabling the IB network? Thanks.