The internet speed is reduced on this device.
The internet speed is reduced on this device.
I rely on fiber broadband offering 400 Mpbs speeds. My connection uses PPoE with a static IP address. I’m running an Asus TUF AX5400 router. There are about 20 WiFi clients—8 using 5GHz and 12 on 2.4GHz—and one wired device (Raspberry Pi handling DHCP, DNS, and Samba). I have a guest WiFi network for IoT devices that isn’t connected to the main LAN. Speed tests consistently show 200-250Mbps across Speedtest.net, fast.com, and Google Chrome’s measurement tool. When I switch off the guest WiFi and connect all IoT devices to my 2.4GHz network, speeds match the promised 400-450Mbps from my ISP. My Oracle Cloud server uses Pi VPN via Wireguard, and speed drops similarly when connected through the VPN client. The router is updated with ASUS firmware, yet performance remains inconsistent. What alternatives exist?
Based on my observations, the Raspberry Pi lacks sufficient power for managing several clients simultaneously or performing multiple tasks at once. Recently, I had to swap my Pi 3 print server for an older Athlon X2 because it couldn't handle large PDFs properly after the 5.0 kernel release.
That’s what my first thought was. I restored the router to its original configuration, removed the Raspberry Pi from my network setup, and applied the standard DHCP and DNS settings offered by ASUS. Still, when I activate Guest Wi-Fi or the WireGuard VPN, the connection slows down. Even after switching off the Guest Wi-Fi or VPN, the Pi still delivers full speed. From this, I’m confident the Pi isn’t the limiting factor. I’ve also tried running the Pi with OpernWRT and achieved speeds up to 400Mbps.