Hi all,   I have an issue of ports flapping. Timing, switch and port seem to be random.      The incident on the 18th was a port an AP was on. The incident on the 16th was a different switch and a wired power monitoring device (https://energycurb.com/). In the past it might be some other random wired device.    In the logs you always see 'Port status change' first then 'Port STP change' with the same time stamp. Does this mean STP is shutting the port or something else is happening?   After speaking with Meraki support it was relayed to me that something wired is causing a loop. They mentioned it would not be possible to determine what device was doing it unless we were able to do a packet capture at the time it was happening.    Here is my topology, I have two wireless mesh connections (labeled since the lines are hard to see) and I've labeled the root bridge (set manually).     Any ideas for further troubleshooting.   Many many thanks.       ... View more