Hi Somnus, finally I found the time to report the result. It Works. The packages are gone. Many thanks for the idea and explanation, Greetings, Taucher

Hi Somnus, thank you for responding I know I'm a bit late but I will try out your suggestion to switch of the loop prevention and report then how it worked. Loop detection should not be required,...

Greetings readers , One of my TL-SG108E switches is a hardware v5 and sends a RRCP-0x25 query once every second on all ports. The other one a v1 is not doing that. The configuration of the switches...