"Network Loops & Storm Control STP State Flapping"

[bslow47]

What does "Network Loops & Storm Control STP State Flapping" Mean.

Have a UniFi US8 switch that 1-8 are also PoE ports. I had 1-8 with cameras and an AP and I had another switch coming in. I was going to add another camera and I needed a PoE port. I took the incoming switch off and put that on port 9 which I had to get an
adapter to make it from SFP to RJ45. This worked good for months. One day it quit working. Since I discovered 180 degree view cameras I didn't need port 1 for PoE anymore so I plugged the switch back into port 1 and everything is back to normal. I now have time
to research what went wrong and discovered this warning under port management tab. So can anyone tell me what this means? Is the port or adapter bad?

As always,

I appreciate the feed back.

 

[bp2008]

That message would indicate that the switch detected a network loop and shut one of the ports down to stop it.

It is quite possibly not your fault, apparently recent(ish) Unifi firmware has a barely acknowledged bug related to this.

https://community.ui.com/questions/STP-Flapping-with-New-USW-Pro-Max-24/d5bef0f3-dea7-4018-a0b0-092dd3005c22

Based on what I read, if you have any machines that are connected to the same network via both wired and wifi at the same time it could be triggering the issue even though that is normally not a problem.