Nighthawk M1- Ethernet Port

tobys you were close to hitting the nail on the head.

I have a mr1100 acting as a modem. It is plugged into the Wan port on a R7300 DST router. Here is how I figured it out. I could set it up and have it working not using passthrough until I put everything in place and plugged the mr1100 back into the power adaptor at which point the data connection was lost to the r7300. I tried it with a Cisco/Linksys router and had the same issue. The fix was simply this, go into the mr1100 settings and change the usb C port setting from Charge/Teathering to Charge. Now the my intire home network is using the one mr1100 and r7300 for internet access. I have the DST for the r7300 in the office section of the house with 2 - 4 computers hooked up to it along with 2 printers. I have a wn3000 extending the network at the other end of the house running an android Mi Box, blue ray player and tv. The r7300 is in the living room in the entertainment system with the mr1100 providing internet access to all previous mentioned plus a 60 inch 4k tv, nvidia shield, blue ray player along with whatever tablets, phones, ect are being used.

This leaves my second mr1100 for use with my Cisco lab consisting of 14 routers and switches, 4 wireless access points and controller, one desktop, 3 laptops, and whatever else I happen to be using at the time. Not an optimal solution but under the circumstances along with my location it is a working solution.

This has been exactly my experience with the M1 connected to a USG. Ethernet port is not detected on reboot. Have to toggle data offloading over ethernet setting to get it to detect, and even when the connection lights up it's not always successful in connecting. Going to try a few other setting changes, but please post if you find a workaround or solution for this.