The cards on both ends are:
[root@basement mnt]# ibv_devinfo
hca_id: mlx4_0
transport: InfiniBand (0)
fw_ver: 2.30.8000
node_guid: 0002:c903:009f:5a20
sys_image_guid: 0002:c903:009f:5a23
vendor_id: 0x02c9
vendor_part_id: 4099
hw_ver: 0x0
board_id: MT_1090110028
phys_port_cnt: 1
port: 1
state: PORT_DOWN (1)
max_mtu: 4096 (5)
active_mtu: 4096 (5)
sm_lid: 0
port_lid: 0
port_lmc: 0x00
link_layer: InfiniBand