Use the following steps if you want to remove an IB pseudo device from the system.
# cfgadm -c unconfigure ib::ibgen,0 Unconfigure the device: /devices/ib:fabric::ibgen,0 This operation will suspend activity on the IB device Continue (yes/no)? Y #
Verify that the device is disconnected.
# cfgadm -a ib::ibgen,0 Ap_Id Type Receptacle Occupant Condition ib::ibgen,0 IB-PSEUDO connected unconfigured unknown