Hardwired connection to my computer accesses the Internet perfectly (after registering its MAC address with Cox). The WiFi router defaults to DHCP; only when it cannot get an address does it prompt to use a static IP address or PPPoE. And yup, I factory reset the WiFi router.
Are you powering off the modem when you switch back and forth between direct to PC and router for testing?
+1 for power cycle each time you change what the modem is plugged into for ethernet. If that doesn't work, check your IPv6 settings. Last, do you have another router to test with?
Yup, cycling power completely as part of the test.
I installed the old modem, had Cox reinitialize it, then tested the Wifi router. Worked like a champ (because it received an IP address from the gateway modem vice Cox).
For clarity sake, what model was the old modem and what model is new modem? What do you see when you sign into the app to reset the modem as per here? That will show what is currently provisioned on the account.
Also, concerning the R8000, what do you see for your WAN/Internet IP? Only expose the first number of the IP for privacy reasons. Is it 0? 172?
Finally, can you check the firmware on the router?
