@Hank21 sorry hank, you're right. This time there was a misconfiguration from me. I forgot to check all boxes for all interfaces. For now it seems to work. Since I have absolutely no idea what caused...

@Hank21 Based on your recommendation i startet a little sheet to test the various port-protfile-combinations. The test scenario looked as following for each port: physically connect to the network...

@KJK Thanks for your reply! Thats really weird. I definitely didnt to anything other on the CLI that showing stuff. Just creating a new VLAN interface after a complete reset. I thought this That's...

@Hank21 Hello Hank, i've tried 2 Linux and 2 Windows 10 Machines. Only 1 Windows Machine does get an ip adress at all. (said one who can't ping the GW). The three other machines fail to get a DHCP IP...

@Hank21 Hi Hank, thanks for your reply. Really appreaciate you looking into this. I meanwhile changed the VLan settings.. its now 1337 .. but basically the same. VLAN1 Interface Config VLAN1337...

Basically the same as describe here .. except for the ACL Rules. https://www.tp-link.com/us/support/faq/3091/