That’s interesting… We do have the 4xSFP+ FlexModule installed as we use DAC cables to uplink to the switch.
How did you end up determining it was the FlexModule? Trial and error? Or did anything show up in the logs? (still waiting for Peplink support to respond to my ticket with the diagnostic logs)
There wasn’t anything conclusive in the logs.
We suspected the FlexModule from the beginning as the only change we made prior to the reboots was adding a 3rd fiber link to it. The reboots started getting more frequent until we removed (and then later replaced) the module.