why the error ip configuration not valid pops up?

[toel]

basically all my pc connected with ethernet to the modem, sometime work and sometime don't, when they don't i get the error "ip configuration not valid"

This is happening from when i changed my modem/internet connection , probably is configured bad but i have no idea of how to check it

This problem pops up only on pc connected with ethernet, all wifi device are connected and have no problem

also if i change the spot of the ethernet cable multiple times then it work again, or if i do right click on the internet icon in the bottom right of windows and then "troubleshooting"

Does anyone know why is happening and how i can fix it? thanks!

 

[Tony D]

First thing to do is to make sure all your computers are set to obtain IP address automatically.
If that's all good, then look to the modem, well actually router. A modem would only allow one computer to connect. Since you have more than one computer connecting, your device is a router. (The router may have a built in modem.) If you made changes to the default modem/router settings - what changes did you make?

 

[toel]

i did not made any changes to the modem/router, also i think all pc are set to obtain ip address automatically but i'm not sure how do i check that?

 

[Tony D]

This is happening from when i changed my modem/internet connection , probably is configured bad but i have no idea of how to check it

Please expound on that.

 

[toel]

i changed from a fwa connection to a fiber connection, and also i changed the modem/router