Question Internet dropping out.

[BigStevie]

My set up is as follows -
From ONT direct to Sage mcomm Fast 5374 Router.

Router port 1 to Work PC - PC says no internet connection but will run off WiFi . Still available unable to connect to to LAN unless router and/or PC is restarted.
Port 2 to Power line adapter to PC in other room - PC loses LAN internet intermittently and does not have wifi - windows diagnostics says "Your DNS server is not responding- detail - Your computer is trying to use a DNS server that is incorrect or does not exist.
Port 3 to 8 port HIKVision internet switch to TV, PC(3), Set top box, Wifi access point (TP Link ac 1200 upstairs), PS4 and PS3. All devices lose internet intermittently except PS4 and 3 which i don't use and haven't had complaints about.
Port 4 to TV(2)

Have no idea why this is occurring - any ideas?

Steven

 

[Ralston18]

On your computer run "ipconfig /all" without quotes via the Command Prompt.

Copy and paste the full results in a post here.

Also make a list of all devices (wired and wireless) with device name, mac, and IP address. Ensure that there are no duplicates.

The list may be needed for further troubleshooting.

 

[bill001g]

Because it affect multiple devices it is more likely the problem is the router or the internet connection itself.

It would be nice if you could get a test to work on ethernet connected directly to the router. When you have wifi or other things like powerline device it makes it more complicated. If you were to call your ISP they would try to blame those things to avoid actually looking at the problem.

In any case best to try to rule some stuff out. How often does this happen. Is this something that happens every few hours/minutes or is this something that randomly happens every couple days.

The reason for the question is the best first test tends to be to plug a pc directly into the ISP ONT. This will quickly show you if the router is the cause or if the internet is really going down. Problem is if you have to wait days for it to happen you have the rest of your network disconnected while you test.

Maybe you get lucky and the log in the router shows something. If for example the router is rebooting there might be a software or hardware issue. Assuming your router is really 5364 it seems a pretty basic router. It has logging but does not have any actual diagnostic tools to monitor the internet.

The fairly standard test is to open 2 cmd windows. Leave a constant ping run to the router IP on one window and a common ip like 8.8.8.8 on the other. Gernally if you get no issue to the router IP but have issues to 8.8.8.8 your internet is actually going down. If you have issue to the router IP then things are more complex but it is something inside your house.