Use ip a to confirm that the SuperNIC interface appears:

ip a
ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2044 qdisc mq state UP group default qlen 256
    link/infiniband 80:81:00:08:fe:80:00:00:00:00:00:00:d0:06:6a:02:01:00:00:32 brd 00:ff:ff:ff:ff:12:40:1b

You should see output indicating state UP, an MTU, and the Infiniband-style link address.