Hi. I'm looking for help diagnosing and fixing a problem with the connection between my router and my modem.
I have an RT-AC66U B1 ASUS router. It has been working well for a few years now, until recently. Recently, the connection between the cable company's modem and the router keeps dropping and getting reset. I have verified that the modem is getting a continuous uninterrupted signal from the cable company.
On a computer connected via LAN to the router, I get notices that an LAN cable is disconnected, followed by a notice that an IP address was removed, and another IP address added. (It seems to toggle back and forth between the same two IP addresses each time this happens.) Most often when this happens, the internet goes out for about 10 seconds, and then returns. It tends to happen in clusters. That sequence repeats several times over ten minutes, for example, and then I stay online solidly for several hours.
On a phone or computer connected via WiFi, I get no notices. I just lose my WiFi connection for approximately 10 or 15 seconds, and then I'm connected again. When I am near enough to the router, I get a WiFi connection over 5GHZ. Farther away, I am connected via 2.5GHZ. Both types of connection drop out simultaneously, and come back at the same time.
What might be causing a problem like that? And what steps could I try to fix it?
What kind of troubleshooting could I attempt to get more information about what's going wrong?
Any assistance will be greatly appreciated! Thanks.
