FDR with unmanaged switch

I have been trying to set up a new cluster using an 18 port MSX6015 switch and 9 systems with connectx-3 cards/built in IB:

08:00.0 Network controller: Mellanox Technologies MT27500 Family [ConnectX-3]

and 8X

02:00.0 Network controller: Mellanox Technologies MT27500 Family [ConnectX-3]

All cables are new FDR cables.

They are running a newish (3.17.3) kernel, although I have 4.0.3 ready to go when I can reboot them.

They are running debian with the current OFED, and even opensm 3.3.18

All firmware has been brought up to the most recent posted one.

I have set

# Force PortInfo:LinkSpeedExtEnabled on ports

# If 0, don't modify PortInfo:LinkSpeedExtEnabled on port

# Otherwise, use value for PortInfo:LinkSpeedExtEnabled on port

# Values are (MgtWG RefID #4722)

#    1: 14.0625 Gbps

#    2: 25.78125 Gbps

#    3: 14.0625 Gbps or 25.78125 Gbps

#    30: Disable extended link speeds

#    Default 31: set to PortInfo:LinkSpeedExtSupported

#force_link_speed_ext 31

force_link_speed_ext 1

(have also tried 31)

# FDR10 on ports on devices that support FDR10

# Values are:

#    0: don't use fdr10 (no MLNX ExtendedPortInfo MADs)

#    Default 1: enable fdr10 when supported

#    2: disable fdr10 when supported

fdr10 1

in the opensm.conf

I still get a connection of 40 and iblinkinfo saye:

4   10[  ] ==( 4X          10.0 Gbps Active/  LinkUp)==>       3    1[  ] "MT25408 ConnectX Mellanox Technologies" ( Could be FDR10)

or

CA: MT25408 ConnectX Mellanox Technologies:

      0x002590fffff7b3c5     33    1[  ] ==( 4X          10.0 Gbps Active/  LinkUp)==>       4   13[  ] "SwitchX -  Mellanox Technologies" ( Could be FDR10)

for all live ports.

Does anyone have any ideas of what i could be doing wrong?

Thanks.