I have a small home network. - 1 unit of cable modem router (provided from ISP) cable modem router connected to home router by LAN cable - 1 unit of home dd-wrt router - a PC connected to home router by LAN - a NAS connected to home router by LAN - laptop wifi connected
I have been using this same setup for almost a year, and recently my internet connection is dropped almost every morning. At night I never turn off all my router, however I always turned off my PC.
To help with some clues, when the internet connection is not working: - PC to NAS by LAN, PC to both router by LAN connection is fine. - home router's wifi not emitting any internet, however cable modem router's wifi is emitting internet normally. - When I unplugged my PC lan cable from the back of home router, plug it into the back of cable modem router's plug, internet at my PC instantly became normal.
Therefore, I am sure that the problem is not at the cable modem router or ISP.
Usually, to get internet back to normal at my PC without directly connecting PC LAN cable to cable modem router, I had to move my 'lan cable from home router' from cable modem router plug1 into cable modem plug2, and then restart my home router. Then internet is back to normal.
How do I know what is the real problem in this situation?