Infiniband RDMA /IWARP how to switch it under Infiniband ROM

Infrastructure & Networking Adapters and Cables Ethernet Adapter Cards
1

Hi everyone, does anyone know how to switch between RDMA and iWARP modes on an InfiniBand adapter under InfiniBand ROM?

2

Hello,

iWARP can only be applied for Ethernet adapters, not Infiniband.
Also, please note that Mellanox adapters do not support iWARP - only RoCE (for Ethernet adapters) or RDMA Infiniband.

If you have any additional questions or issues, please feel free to open a case at enterprisesupport@nvidia.com, and it will be handled according to entitlement.

Thanks,
Jonathan.

1 Like
3

Firstly, I am very grateful for your answer.
I have some questions about InfiniBand, RoCE

1.We cannot determine which protocol(RoCE/RoCE v2) is running right now by using the command ibv_devinfo.

2.Why is the maximum speed different between InfiniBand mode and Ethernet mode,
like this “MCX456A-FCAT”; Infiniband mode FDR is 14Gb/s,but ethernet mode come to 56GB?
Protocol Support
InfiniBand(a): IBTA v1.3Auto-Negotiationa : 1X/2X/4X SDR (2.5Gb/s per lane), DDR (5Gb/s per lane), QDR (10Gb/s per lane), FDR10 (10.3125Gb/s per lane), FDR (14.0625Gb/s per lane) port
Ethernet: 56GBASE-R4, 50GBASE-R2, 50GBASE-R4, 40GBASE-CR4, 40GBASE-KR4, 40GBASE-SR4, 40GBASE-LR4, 40GBASE-ER4, 40GBASE-R2, 25GBASE-R, 20GBASE-KR2, 1000BASE-CX, 1000BASEKX, 10GBASE-SR, 10GBASE-LR,10GBASE-ER, 10GBASE-CX4, 10GBASE-CR, 10GBASE-KR, SGMII