Strange router problems?

[ben0812]

Hey! I have a router problem. On last saturday, i got the new 1000mbit/s internet in my house. My ISP(called Digi, in Hungary .) Gave me a Huawei(Huawei EchoLife HG8242-B,) modem/router(?). I bought on monday a new TP link AC1200. BUt i was experiencing internet drop issues. (it lost connection after 30mins, and keeps doing that in that interval.) So I called my ISP, they came to my house on wednesday, and told that, the problem is in my router. So i took it back to the shop, and bought a new TP link AC1750 V4.0 on Thursday. But the problem still appear, and I've tried everything. Dhcp change, MTU size change, frimware upgrade/downgrade, DNS change but it still drops the connection on WIRED. The problem appears on every WIRED computer, at the same time. Before first my ISP came to my house, the Huawei was in Dinamic IP mode, but my ISP changed that to bridge mode, so now the connection is now, a PPOPE one. Problem still appears, every time, and ISP keep saying, there is no fault at their end. But it'S possible to get 2 wrong router? My ISP will come today too. SO what should i change to finally forget this problem?
The strange thing is , from an old TP link 941N router, everything works fine.
Now, what could be the solution?
Should i buy an ASUS router?

 

[failboat]

How do the wires go through the house? Is there a powerline or anything inbetween?

New routers can cause issues due to subnets changing. You could have statics assigned that are conflicting with the gateway. It's best to test with minimal variables and see if you can get it working well then add on from there. the biggest offender is two routers both trying to use the same gateway or 2 dhcp servers with one pointing to a wrong gateway. make sure only one dhcp server is running on the network.

 

[ben0812]

I get the internet on an optical cable, which runs in to the modem, and from the modem on a cat6 cable connect to the router wan port , and from a router there are 2 cat6 cables too which connect to the 2 PC. How to check that the 2 router using the same gateway? How to check if there are 2 dhcp server?

Btw yesterday my ISP came again. They changed the Huawei modem to an another, and it looks like, the modem was a problem, because i don't expereince internet issues, from yesterday 10am, and now 12am.(so it's more than 24hrs) And now again i get the connection from dynamic ip again, not ppope.
So i hope, this was the issue. But answer this 2 questions please.
Thanks.

 

[failboat]

You need to be able to login to all your network equipment and see what it's doing. If your modem is a router and you also have a router. you can nest them or turn the second into a wireless access point.

When they are nested you want them on different subnets. when it's a WAP you want the web management page on the correct subnet and the WAP shouldn't be running a DHCP server.