Ping test
Ping is a commonly used tool when troubleshooting communication problems on a network. It determines whether information can be sent from your router to another location and back again, and how long it takes to do so. You can also specify the number of times the information is sent.
Access the command prompt. Follow the instructions below according to your Operating System (OS):

For Windows 8/8.1 - Press the Windows

For Windows 7 - Click the Pearl

For macOS® - Click the Applications > Utilities > Terminal.
Perform a ping test. Enter “ping google.com" and press [Enter]. Take note of the results.
For Windows:
You will see the Ping Statistics in the Command Prompt window. If your computer received replies and no lost packets, it means that it is connected to the internet. But, if it received no replies and had complete packet loss, it means your computer is NOT connected to the internet.
For macOS:
You will see the Ping Statistics in the Terminal window. Your computer is connected to the internet if the results indicate repeating lines that show the bytes that were sent and the time it took, plus the statistics of total packets received and transmitted with very minimal to no packet loss.
However, if there is no response from the server and the statistics of total packets indicate no transmission with complete packet loss, then your computer is NOT connected to the internet.
The intermittent connection on the router might be caused by the cables not properly connected to it. Check the indicator lights to signify its connectivity. If the light is not lit, try using another ethernet cable or check if the cable ends are connected securely.
Router reset and reconfiguration
If all computers cannot go online and you have internet connection when connected to the modem, you may need to reset and reconfigure your router. Resetting the router will restore the device to its default factory settings and you will be able to reconfigure it again. For instructions on how to manually set up a Belkin router, click here. To set up a Belkin router using the Dashboard, click here.
Outdated router firmware
A firmware update contains encoded instructions to help improve the performance of your Belkin router. It could also resolve issues that the previous firmware version may have. For instructions on how to update the router’s firmware, click on the links below:
Updating the router’s firmware through the Belkin Dashboard
Updating your Belkin router’s firmware
Related Article:
Troubleshooting wireless connectivity issues