High switch traffic during the night - how to identify cause
I often see quite intense traffic on my switch during night time (almost the opposite of my EAPs traffic activity graph). Now I'm wondering what's causing this but don't know where to look to find the device(s) causing it.
All of my wireless clients (the majority) can only use wireless so that rules them out. My desktop pc, printer and Playstation are completely turned off (not even in standby). The only remaining clients that are active during the night are my OC200, QNAP, Sonos speakers (only Playbar is wired, the rest is connected to it via Sonos' private wifi) and my solar inverter (which I expect to be completely inactive during the night :-) ). What I see is traffic up to 5,3 TB which looks a lot. At the same time the EAPs traffic is 112 MB.
Does anyone have a suggestion to help me find the cause? Or an explanation (maybe I'm making the wrong conclusions)?