ethernet port

We hear how frustrating this has been, especially since you’ve clearly done your homework and confirmed your internal network works perfectly with your previous provider. At this point, this is not a home network issue and not a learning curve issue on your end. You’ve proven that by swapping only the modem and seeing the failure follow the Xfinity equipment.

Here’s the straight truth. If the Ethernet port on the Xfinity gateway shows link lights, but your router never receives usable internet, the problem is almost always one of two things on our side: either the gateway is not fully provisioned for data, or the gateway is in an incorrect mode for your setup. Rebooting and cable swapping won’t fix either of those, which explains why you’ve been stuck in a loop since December.

One very common miss is that the gateway is not actually passing a public IP to your router. Even though the port lights look healthy, the modem may still be stuck at the activation layer. When that happens, the Ethernet port technically “works” electrically but never hands off service. Another possibility is that the gateway is in a partial or failed bridge configuration, especially when a customer is using their own router, which you are. That would also block Ethernet traffic even though link lights are present.

This is also why the tech visit didn’t resolve it. If the gateway is provisioned in the billing or activation system, no amount of physical troubleshooting in the home will fix it.

We would like to take ownership of this and make sure the modem is either properly activated for Ethernet pass-through to your Linksys router or replaced with one that is. 

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