Oops, I gave you bad info there.
Didn't notice/remember that you're using EN cards. i.e. Ethernet only ones
I don't think the Infiniband specific commands work with them.
Guessing that your adapters should probably show up as ethernet cards instead. eg: eth0 eth1 eth2 or similar.
If that's the case, normal ethernet configuration stuff should work fine.
I have no clue at all about Ansys RSM so no suggestions there.