@Andone Thank you very much for the quick. The problem is solved. But first, for my region there is no newer firmware available for download. I found the solution when I changed on PC1 (which is...

Hello, I have problems to build up a reproducable fast Gigabit connection via cascaded TP-Link switches. Speed tests are done by copying a 1GB file in Windows environment. Target Router - TL-SG1024DE...