Mesh failover caused a network loop?
I had an interesting experience today while trying to set-up a dual WAN on my router, as part of that process involved rebooting the router. This was the first router reboot since I added my second AP.
While the router rebooted it seems that one of my APs (LivingRoom-AP) was "isolated" and then connected to my main AP (Hallway-AP) via mesh. As both APs are wired this seemed to panic the router when it restarted, as it detected a network loop between the wired and mesh links, and responded by disabling the uplink ports on both of my office switches.
I corrected this situation by restarting both office switches (as I wasn't sure what was happening at the time), though I assume this only worked because it also killed the PoE connection to my main AP which broke the mesh link.
I have since disabled the mesh feature since I don't need it, but I feel like I should raise this as an issue since it feels like a minefield. I'm not sure which part of the network equipment was at fault though.
I've included a screenshot of my network topology for reference:
EDIT:
Re-reading my logs it seems that the port blocking happened 5 minutes before the AP reported as isolated, so I'm not sure now whether that really was the cause. I can't think of any other explanation for the loop though...
