I've had this router (Asus RT-AX86U) for a little over two years and it has functioned perfectly until this last month. I have 2gig symmetrical fiber internet and when using the router's built in speed test, I was getting ~1,800mbps download and ~2,000mbps upload until mid-March. For the past couple of weeks, the speed test is showing ~400mbps download and ~2,000mbps upload. I have no idea why the download speeds are so slow. A technician from the internet provider stopped by and confirmed that the ONT is flashing a green light which means that the receiving client (my router) is sub gig. They connect the ONT to two different routers they brought with them and both of them were showing ~2,000mbps download speeds. So it has to be the router. Does anyone have suggestions on what I can do to troubleshoot this issue?
Some additional details:
Some additional details:
- The ONT is connected via Cat5E cable to the router's 2.5gb wan port.
- The router firmware version is 3.0.0.4.388_24231
- I have tried rebooting the router and ONT.
- I have not tried to factory reset the router.