Hey!

I’m having an issue with the Archer AX18 | AX1500 Gigabit Wi-Fi 6 Router. The CPU usage suddenly jumps to 100%, and the network becomes very slow. When this happens, ping to the internet goes up to ~1000 ms. It affects both Wi-Fi and LAN devices, and the spikes happen almost every day at random times.

My setup is an ISP modem in bridge mode, with the router connected to it. My PC is connected via LAN, and several other devices use Wi-Fi.

I’ve tested ping from Wi-Fi devices, LAN devices, and directly from the router diagnostics, and the results are the same everywhere.

When I ping the router itself, the latency is <1 ms, so the local network seems fine. The high latency only appears between the router and the internet.

Restarting the router fixes the issue immediately. If I just wait, it usually goes back to normal after about 5-10 minutes.

Does anyone know how I can fix this?

Thanks!