I have a Asus mesh network with a Asus GT-AX11000 and two Asus ZenWiFi xt8s connected to the TM Internet device. I am getting good speeds from the TM modem (250-350 Mbps) which then translates to 150-250 Mbps from the mesh network. I had the mesh network connected to a cable modem with Comcast service which I discontinued when I found I could get decent speed from TM internet.
When I switched I made no changes to the AX11000 unit, simple plugged into the TM units ethernet port. The issue is after a few days speed from the mesh network drops dramatically (0-50Mbps) while the TM unit usually maintains good speed. There is of course speed changes throughout the day but never as dramatic. Should I make other configuration changes to avoid this? Is there an optimal configuration for the mesh network?
