Region : Germany Model : TL-SG3216 Hardware Version : V1 Firmware Version : 2.1.6 Build 20141218 Rel.61735(n) ISP : Telekom Hi, I have 802.1X AAA woking with a freeradius server, some TP841 Wifi...

Good point. That seem to have fixed it for me too. Btw, before upgrading I disabled the SNMP based monitoring of the switch, which also made the problem disappear.

Same issue here. I opened a ticket #136214 referencing this thread. Sebastian