40G SR4 NIC Support

Hi, I am using a ConnectX-4 with a fibre 40Gbase-SR4 QSFP. The QSFP is directly connected via a fibre breakout to 4 independent 10G streams.

It appears the standard driver included with debian connects at 10G and only uses one of the lanes.

What are the other options to receive data from all 4 lanes? Is this only possible using VMA?


No, the 40GBaseSR4 QSFP has an MPO12 fibre connector which is then split into 4 independent streams (LC fibre) coming from different devices which use 10GBaseR. I would like to receive data from all streams (transmit is not important).

You mean you connect QSFP to a CX4 card ?

Hi Dan,

Could you please open a support case by sending email to support@mellanox.com mailto:support@mellanox.com with the above question ?