I am new to infiniband networks, but i need to extend an existing infiniband cluster with some nodes. During my exploratory web-research I came across some to me ambiguous descriptions of cables, connectors and switches.
According to Wikipedia QSFP is specified as 4x1Gb/s, and QSFP+ as 4x10 or 40 Gb/s. However many suppliers on the web are offering QSFP cables and switches for 40 Gb/s. This some how does not seem to match with the overviews on different infiniband cabling that i found.
Is this just sloppy naming and are these QSFP 40Gb/s actually QSFP+? Is there a difference in the physical connections between QSFP and QSFP+? Or are just the cables of a different quality (like CAT6 and CAT7 cables), but is the shape of the connectors the same?
I would be very thankful if some body could clarify this a bit.