There are Ethernet switches (copper based, i.e. with RJ45 sockets) that have Fibre uplink. Example: Netgear GS110TP
Are there any such switches with Infiniband uplinks? If not then why?
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No, this is unlikely. – ewwhite Jan 18 '18 at 18:24
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Ethernet and InfiniBand are two completely different and incompatible layer 2 protocols, for one. That's certainly sufficient. Don't confuse the physical media (layer 1) with the wire protocol (layer 2) that runs over the physical media.
Michael Hampton
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I suppose there's IPoIB but that probably won't solve whatever problem you are thinking about. – Michael Hampton Jan 18 '18 at 22:49
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No, that won't solve my problem. My problem is that I have an Infiniband card in one computer and an Ethernet card in another computer and would like them to talk to each other. – Greg Jan 19 '18 at 23:21
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In that case, get another Ethernet card or another InfiniBand card. – Michael Hampton Jan 19 '18 at 23:34
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Then you need an dual-port card that can toggle between InfiniBand and Ethernet. Or a different chassis with more expansion slots. – John Mahowald Jan 25 '18 at 14:03