ConnectX-3 cards with MLNX-OFED 5.9

Infrastructure & Networking Adapters and Cables InfiniBand/VPI Adapter Cards
1

Hi,

Do i understand this correctly that only some capabilities will not work if i will install MLNX-OFED 5.9 on Rocky 9.1 using ConnectX-3 cards but in general it will do the job?
“MLNX_OFED 4.9-x LTS should be used by customers who would like to utilize NVIDIA ConnectX-3/ConnectX-3 Pro/Connect-IB capabilities which are not available on MLNX_OFED 5.x branch.”
What will be the capabilities which wont fork?
Or it wont work at all?

Thank you

2

The driver will not install unless you use the “skip” flag and you will see for example this message.
Using the flag, the driver will install but will not bind to unsupported devices, so it not work.

System has one or more unsupported device, see below.
MLNX_OFED / mlnx_en 5.1 and above supports only ConnectX-4 or newer devices.
This device could become unavailable which might result in loss of connectivity.
Use --skip-unsupported-devices-check to skip this check.
Aborting.

  • 81:00.0 Infiniband controller [0207]: Mellanox Technologies MT27600 [Connect-IB] [15b3:1011]
  • 81:00.1 Infiniband controller [0207]: Mellanox Technologies MT27600 [Connect-IB] [15b3:1011]

Our drivers download page also mention:

Note: MLNX_OFED 4.9-x LTS should be used by customers who would like to utilize NVIDIA ConnectX-3/ConnectX-3 Pro/Connect-IB capabilities which are not available on MLNX_OFED 5.x branch. MLNX_OFED 5.8-x LTS should be used by customers who would like to utilize NVIDIA ConnectX-4 onwards adapter cards.

3

Dear spruitt!

Thank you for the help!
The plan is then to install 4.9 on Rocky 8.8 and build the cluster with OpenHPC 2.0. This should work.

Szabolcs