Does the XB8-T gateway support IEEE 1905.1 Protocol

jarome, Hi there! Thanks for confirming this for us and for reaching out. I can certainly understand the concern with wanting to know if your Deco mesh device will work with our XB8 modem. We can help. While we don't have an official recommended list, some systems can be compatible. Were you able to use the Deco mesh device on one of our older models? At Comcast, we offer our WiFi Boost pods like in this link here. Our WiFi Boost Pods are easy-to-install devices that can be paired with the XB8 Gateway to help extend the range of the WiFi coverage in the home, but are not intended to provide the maximum speed of the internet speed tier throughout the home.

jarome, In researching this further, I confirmed that Deco mesh networks were working correctly on our XB6 modems when the Deco device was set up as a WiFi router. Is your XB8 set up as a WiFi router and still not working properly? Here are some steps to try as I recently read reviews on Deco devices that the mandatory DHCP server in mesh mode conflicts with the mandatory DHCP in the Xfinity modem. Plug your primary Deco into the LAN side of your XB8 which should give it an IP. It’s likely worth using an Ethernet cable to confirm connectivity just for the sake of troubleshooting ease, starting with testing the modem, then down from there. Once good, put your Deco device into the DMZ/pass-through mode on your modem (assuming it has the functionality) and assign it an IP from the DHCP range. It should be all good from there. Please let me know if this helps.