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.
Just wanted to share the update here for anyone else that comes across this issue/post.
Peplink support says they identified the problem as a “CPU lockup issue due to driver related issues.”
They provided a custom firmware release to patch: Firmware 8.5.1s053 build 5992.
We’ve been running this for ~11 days and it’s been stable. But the random reboots were happening over longer duration eg. 17 days - so we’ll see if this holds.
Support advised this fix will be included in version 8.5.2 which has an ETA of ~30 days.
Since running the special hotfix release: 8.5.1s053 build 5992 - we have not seen any restart issues with our SDX Pros.
Support said this fix would be part of 8.5.2 release - which we have not tried yet (still in beta).
Reviewing the release notes, I see this custom firmware being referenced to resolve a “system stability issue” - but it says it’s specific to the Balance 310 5G and BR1 Mini 5G (not referencing the SDX Pro where we experienced the issue).
