Link problem between SFP28 and SFP+

Infrastructure & Networking Adapters and Cables Ethernet Adapter Cards
1

Computer: Windows 11 22H2 with March 2023 updates (22621.1413)
Product: Connect-X 5
Driver: 3.20.25915.0
Firmware: 16.35.1012

Cannot SFP28 10G/25G get working with SFP+ 10G in Cisco switch.

Setting “mlxlink -d mt4119_pciconf0” --link_mode_force -speeds 10G ends up with “Cable speed not enabled”.
With no speed specified (mlx5cmd -LinkSpeed -Name “blabla” -Set 0) it ends up with “Negotiation Failure”.
Cable is OM4, length is 30 meters.

Using Cisco’s SFP+ 10G in Mellanox ConnectX-5 card establishes link and network connection is functional.

2

Hi marian.hercek,

Thank you for posting your question on this community thread.

Please verify if the cable and SFP connectors you are using are listed under the Firmware Compatible Products list for ConnectX-5 firmware version 16.35.1012 release notes documentation.
https://docs.nvidia.com/networking/display/ConnectX5Firmwarev16351012/Firmware+Compatible+Products

Best regards,

Nvidia support