Hopefully you also bought a switch

they have 2 interfaces each so you typically daisy chain them

That will hurt latency and latency is very important for good tensor-parallelism performance

	▲	mmastrac a day ago \| parent [-]
		I think I need one now that I have four - reduce is ring-oriented and still works I believe, but IIRC you only get 200gbps if you use _one_ of two connectx ports.