I have a C4000 and I'm experiencing the same behavior. I have 1 Gbps from my ISP. I get 900 - 950 Mbps consistently. After a few hours, however, it goes down to 400 - 450 Mbps. Only a reboot fixes...

TP-Link technical support was able to help! The problem was that my Address Reservation hostnames had a space in them. They recommended not having special characters or spaces in the hostnames and...

Model : Archer C4000 Hardware Version : V2 Firmware Version : 1.0.3 Build 20180322 rel.2657(5553) I'm having this *exact* same problem -- when I reserve multiple IPs outside of the DHCP pool range...