If you connect the SM to the PC via the USB 2.0 cable, you can go to the “SM Network Configuration” menu item in the Utilities drop down in Spike (the device must be “disconnected” in Spike for this menu item to appear). This will allow you to poll the device for what it thinks it’s current network settings are. I don’t know how the network settings would have changed but this would allow you to at least verify everything is as expected.
Have you ruled out the SFP+ transceivers or fiber cables? We’ve definitely seen these go bad before.
Do you have any other equipment that can be easily swapped or ruled out? Do you use one of the QNAP adapters? NICs?
Does the LED do anything when attempting to connect in Spike?
