@woozle I've changed nothing. All Ports are on 1000 Mbps Full Duplex. QoS ist activated with 1000 Mbps. Is that ok? Any other suggestions?

@woozle Hi woozle. Thank you for your reply. I've checkt this. All Connected Ports ar 1000 Mbps.

I've Internect Connect with 240mBit. It works before the Router with 240mBit After the Router (Connected to one of the 4 1000mBit Ports I've only 100mBits. I've connect to and from the Router with a...