Hey @mrasgt, thanks for joining the community!

When setting up your Deco X20 as your network's primary router or gateway, if your Canon printer was previously connected to a different network or router, you will likely need to reset its network settings and reconfigure it for the new network/router. This is a common requirement for network printers when changing routers or Wi-Fi network settings, and it is not specific to Deco Mesh Systems.

Most network printers have a Wi-Fi settings protocol to follow in these situations. It's best to refer to the printer's User Guide or the manufacturer's website for detailed instructions on adjusting these settings when the network changes. Sometimes, it's as simple as running a software tool on a PC that is connected to your network and was previously working with the printer, while in other cases, you may need to adjust the settings within the printer's on-board control interface.

After updating the printer's network settings, you may also need to update the network or device profile information for any devices (e.g., PCs) previously connected to the printer. This may be as simple as adding the printer via the Printers and Scanners panel (if using Windows) or may involve reinstalling the printer driver or using a software tool from the printer manufacturer to update the printer's network location/profile for your PC(s). This ensures your devices can find and communicate with the printer in the new network environment. Please consult with Canon support for more information on which steps will be required in your case.