Can I use an ethernet connection from my Orbi router to an Xi6 TV box with XB8 Gateway used as only a bridge?

My primary box is an XG1v4-A DVR.

Thank you for confirming that, @Nosmoke. You can upgrade to the Xi6 wireless 4K box. It just has to be connected to your home network, regardless of if you use our modem or an Orbi for the WiFi. It will work for you. Would you like us to get a shipment set up for the box? 

So I can plug the ethernet cord directly from the Orbi into the Xi6 wireless 4K box and it should work fine?

And the gentleman below mentioned that he had two XG1V4 DVRs.  Is that an option also?  

 I don't want to use WIFI, but either Coax or wired ethernet (thru the Orbi)

Really?  Do you have to pay for two DVRs?  Are there any issues with that setup at all???

Good to know that's a viable option (but more costly).  Thank you.

You're welcome, @Nosmoke! Let us know if you have any additional questions. If you would like assistance getting one of those options set up, we are able to help you here though a direct message. 

Feel free to send us a direct message at your convenience with your full name and complete service address to “Xfinity Support”. To do so, click on the direct messaging icon located at the top right of this forums page.

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So just to be 1000% sure before I pull the trigger, I can plug the ethernet cord directly from the Orbi into the Xi6 wireless 4K box and it will work fine?

Yep, it will work fine with your setup, @Nosmoke. You can connect the Xi6 box with ethernet to the Orbi.