Hello,
I have a pair of ConnectX-3 VPI adapters (MCX354A-FBCT) in Ethernet mode and am attempting to test out 56 GbE connectivity by directly connecting the adapters to one another via an FDR cable (MC2207128). However, the cards only establish link at 40 GbE. In fact, ethtool at least does not seem to report that the card is 56 GbE-capable. I am using firmware 2.31.5050 and driver 2.2-1.0.0. For example, ethtool shows the following:
| Supported link modes: 1000baseT/Full | |
| 1000baseKX/Full | |
| 10000baseT/Full | |
| 10000baseKX4/Full | |
| 10000baseKR/Full | |
| 40000baseKR4/Full | |
| 40000baseCR4/Full | |
| 40000baseSR4/Full | |
| 40000baseLR4/Full |
Looking at the some of the ethtool source (drivers/net/ethernet/mellanox/mlx4/en_ethtool.c), I do not even see the #defines for reporting 56000 links. ibv_devinfo similarly reports the speed at 40 GBE.
Does something else need to be done to enable 56 GbE support on these cards?
Regards,
Thomas