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    ConnectX-4 MCX4131A-BCAT stuck at 1Gbps

    I've got a MCX4131A-BCAT stuck at 1Gbps. Previously, I had a MCX354A-FCBT with all of the same equipment running at 40Gbps. What gives? What can I do to get back on to 40Gbps?
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    40GbE ConnectX-4 to ConnectX-3 Transceiver Recommendation

    tl;dr - I'm trying to connect a ConnectX-4 MCX4131A-BCAT to a ConnectX-3 MCX354A at 40GbE. My Kaiam XQX2502's only seem to negotiate 1GbE. Is there a transceiver that will get me back to 40Gbps? Previously, I had two ConnectX-3 MCX354A's connected (Windows to Linux) with Kaiam XQX2502's linked...
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