How did you remove ethernet interface from router? Physically? Then I doubt if you can connect to your router
Do you have more eth interfaces? What router it is? Configuration?
He use a CPE on the roof as a router and now he has 15 inches of snow around the CPE
Wrong configuration in the wrongest weather
For me the hardware reset is cumbersome as the router is fixed with a mast placed on rooftop for signal strength. In a chilly and snowy winter, with 15 inches snow on roofs, I have stopped now using this mode of internet.
Take a ladder, go on the roof, take down the CPE and hardware reset it. I did it with my WAP R misconfigurated too, but here in Italy there is no snow