After a trying 6-hour Xfinity installation appointment yesterday, and nearly an hour on chat with tech support today, here's what I think I've learned. Can someone tell me if i'm wrong, or if you see another way to get this done?
My current setup:
- Arris 8200 Modem, DOCSIS 3.1. No Wi-Fi or MoCA with this box, just a straight-up modem. Attached to house's Comcast feed from street via one arm of a splitter.
- X1 non-DVR box, attached to main house Comcast feed via other arm of splitter; this powers the "main" TV over a coax connection. This is working well.
- secondary box for upstairs TV; first attempt it was ? maybe xi3 box; final attempt xi5P; doesn't work.
I use Unifi Networks gear, including a gateway and a switch, and a WiFi transmitter on each floor of a 3-floor townhouse. The place has ethernet and coax in-wall, which terminate in a closet in usual disorderly, poorly-labeled builder style. (Built 2013). So my modem, gateway, and switch live in the wiring closet, and the WiFi transmitters are hardwired to the system thru the switch. All works well.
I wasn't here to witness the installation (poor wife), but evidently the tech got internet service going (which I later got configured into my LAN/WiFi networks) at nearly gig speeds. So far so good. And the main TV works fine. I'm not sure which secondary box he was trying to install at first, but he ran afoul of "cable" issues. Perhaps he was trying to connect the primary X1 box via in-wall coax run to the upstairs secondary box? At any rate, he failed. I convinced him to leave us the xi5-P box so I could try to make it work, but evidently it's incompatible with the Arris 8200 modem because the Arris lacks MoCA.
MoCA is a protocol that allows ethernet signals to propagate over coax, correct? If this is so, then what the secondary box "wants" is ethernet. Indeed, the xi5P has both WiFi and ethernet connection ability. Not sure why it *has* to be MoCA.
I'd rather keep this modem, and figure a workaround for the upstairs TV. I have tried to set up the xi5P box by connecting it to my network via ethernet or WiFi. My system recognizes it and assigns it a local, internal IP address, but the box won't complete its startup routine. "Connection" issues errors pop up. I've even connected it directly to the second ethernet port on the modem; no dice.
I'm tempted to think that there's a port or VLAN setting that would allow this to work; but if so, Comcast/Xfinity ain't sharing it!
Anyone have any insight on this? Thanks all!