Hello, I was reading a year+ old article where Steve Scott (CRAY CTO) was interviewed here: https://www.nextplatform.com/2016/01/08/cray-cto-connects-the-dots-on-future-interconnects/ At a certain point Steve mentions (or at least that's what the article claims): /InfiniBand has another limit in terms of the number of logical IDs, or LIDs, it can support, which is around 48,000 end points, and for the most point, people have stayed within that limit. There is an extended version that has some higher packet overhead that can go to higher scalability./ Is this true? Is there any reference that one can point me to for the part of the "extended version that has some higher packet overhead that can go to higher scalability"? To the best of my knowledge, there is no extended version defined in the InfiniBand specification. What is mentioned is that /The unicast LID range is a flat identifier space defined as 0x0001 to 0xBFFF./ Vangelis
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