Thanks @yuxin.zou and @alzhao!
- I will try the beta firmware, but would like to confirm that I can roll back to production (3.215) easily (including config) if necessary.
- It would be great if the sticky at the top of the troubleshooting forum included details on how to collect a log.
Regarding subnets - there is no different IP configuration; only the addition of an external switch. All subnets etc. are the same with/without the external switch.