Hi,
I'm testing the 40GbE connection with a normal FDR cable with Cisco Nexus 5672.
You have to enable this on the cisco:
service unsupported-transceiver
n5672a# show int e2/5 transceiver details
Ethernet2/5
transceiver is present
type is QSFP Unknown Type-(unknown)
name is Mellanox
part number is MC2207312-005
revision is A2
serial number is
nominal bitrate is 14100 MBit/sec
Link length supported for copper is 5 m
cisco id is --
cisco extended id number is 0
Regards,
Chris