Similar problem here. Comcast sent me a new xfi gateway yesterday, and asked that I switch it for the old one. I installed the new gateway and put it in bridge mode to accomodate my Google mesh wifi network. This is the same setup I had on the old gateway. Everything works great, except for the xfinity stream app on my Roku TV, which doesn't recognize the Google mesh wifi as xfinity, even though it emanates from the xfinity modem. "This device can only access XFINITY Stream on your in-home XFINITY WiFi," is the error message I receive. I have verified that the new gateway's serial number and model number have updated in my xfinity account profile. I have verified that my Roku TV is connected to my Google mesh wifi. I have verified the DHCP.
Should I assume that the problem is bridge mode--i.e., that the wifi signal is not coming from the xfinity gateway? This seems like a silly restriction, if so. As long as xfinity is my ISP, it shouldn't matter which wireless router I use.
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