How Speed is changing from 56 to 100

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

Hi Team,

How Mellanox is able to increase his speed of the interconnect.

how from 56 to 100 GBps

Need technical document for understanding.

Thank You

2

Hi Atul,

Not sure exactly what you’re asking here so I’ll answer in terms of the IBA spec.

56 Gbps is 4x FDR. 100 Gbps is 4x EDR. A port can support FDR, EDR, or both. When peer ports negotiate the link between them, the link should come up at the maximum speed/width shared by the peer ports if there are no difficulties with the link negotiation. If some issue occurs (perhaps cable only works at FDR for some reason), a downgraded speed or width is possible.

– Hal