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ConnectX-5 link stays down after repeated DAC plug/unplug cycles until mlxconfig reset
A dual-port ConnectX-5 (MT27800, firmware 16.35.1012, MLNXOFED 5.8 on BC-Linux 8.2) connected to a switch with a DAC would not recover after the cable had been connected and disconnected about fifteen times: the port stayed in State: Polling with Physical state ETHANFSMABILITYDETECT, and mlxlink…
