Maybe, my closest neighbor is a truck driver and is trucking for long periods. Still same results. The ISP modem stays constant. But it plagues both routers.Possibly interference from neighbors?
Sounds unlikely in that case. Unless it’s some non-WiFi interference. If you are on Merlin’s firmware you could check the WiFi analyzer and see if you are getting interference. That’s quite odd.Maybe, my closest neighbor is a truck driver and is trucking for long periods. Still same results. The ISP modem stays constant. But it plagues both routers.
Optical, they state 50 Mbps, but I get 25. Good enough. I have 9 cameras attached, 4 smart plugs, and 2 laptops, 5 androids using split routers on same ISP modem. So 3 routers on same isp modemis the ISP router using the same speed test server that you are when you speed test through the Asus ( through the ISP router) ?
Or is the ISP router using an internal server ?
What type of ISP service - cable tv or phone DSL or ?
What level of service - Down/Up Mb/s ?
Anything else using your network during the evening ?
There are 4 ports on the optic cable modem/ router. I have 3 routers connected to ports. A TP-Link router, a 68u router, and an 86u router connected to 3 of the 4 ports. All 3 routers are connected to the cable modem at 3 separate ports. I use the TP-Link without an OpenVPN. Yea, I know it's an over kill.Think we need some clarification on your install.
From what you wrote your ISP modem is actually a modem/router? It is connected to fiber optic cable?
Your Asus AX86U running in router mode with its WAN port connected to a LAN port on the ISP modem/router? What is the AX68U connected to?
If it is difficult for you to describe draw a picture of your cabling and devices and post it to this forum. We will not pick on your artistic ability.
I use Speedtest by Ookla for all test.50 Mb/s symmetric ie. 50 up/50 down stated ?
Who is the ISP ?
What of the above list is connected by wire, what by wireless radio ?
what is an android - a phone /tablet ?
what do you mean by a "split router" ?
what device are you using to test with ?
BTW, what you described initially is typical of a cable TV ISP where the speed drops when everyone on the "neighborhood" comes home and starts streaming and browsing the internet. Optical or coax connection does not matter.
If the system is 50/50, those high download speeds are more likely from buffering somewhere in the hops to the server which is why i asked about how you are testing and which server is being used for the modem/router test. Also if you are not using the same device connected by a wired connection for testing and nothing else using the internet connection or the router, the results can be all over the place.
OK, then you should have the Asus and TP Link routers set to access point mode. I suspect with the four devices broadcasting WIFI you are creating your own interference. When evening comes and activity on your WIFI increases the WIFI in the devices detect that activity and work to reduce interference. What you get is slow down.There are 4 ports on the optic cable modem/ router. I have 3 routers connected to ports. A TP-Link router, a 68u router, and an 86u router connected to 3 of the 4 ports. All 3 routers are connected to the cable modem at 3 separate ports. I use the TP-Link without an OpenVPN. Yea, I know it's an over kill.
I will try that, eventually I will migrate everything to the 86u. The problem existed on the 68u before I added the 86u. NowI see both appear to be the same. The isp doesn't change, and the download stays the same.OK, then you should have the Asus and TP Link routers set to access point mode. I suspect with the four devices broadcasting WIFI you are creating your own interference. When evening comes and activity on your WIFI increases the WIFI in the devices detect that activity and work to reduce interference. What you get is slow down.
I recommend you put the ISP modem/router in bridge mode and turn off the WIFI. Set the AX86U in router mode connected to the ISP bridged device. Connect the AX68U as an AiMesh node with wired backhaul. Dump the TP Link.
Of course you will do what you want and continue to have issues.
Trust your Asus router with the default WIFI settings
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