Internet LED light is redbud still have internet service

[BandD]

The internet LED light on the router is solid  red yet still have full internet service.  Connected to iMAC, use Cox internet service

Need help - thanks

[FURRYe38]

There a model # of this router? 

What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too?
Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended. 

Has a power off for 1 minute then back ON with the ISP modem and router been performed since last update?
Be sure to restart your network in this sequence:
Turn off and unplug modem.
Turn off router and computers.
Plug in and turn on modem. Wait 2 minutes for it to connect.
Turn on the router and wait 2 minutes for it to connect.
Turn on computers and rest of network.

[plemans]

What modem/gateway is it connected to? 

Half the time I see the internet led red but internet working fine its because of a double nat. 

A couple nat is when your running more than 1 router