@ikaramichev,

What you are asking can be achieved relatively easily but is not recommended.

You would configure the Decos, then change the operation mode to AP Mode, and configure the devices to use the same network name as the router.

If you are going to have another router ahead of your Deco, it is already recommended to use AP mode so as to avoid a Dual - NAT scenario.

We don't recommend using both a router network and your mesh network at the same time, as they cannot mesh together. This means that your device may have unintended network switches as they have to connect to the router network or the mesh network - also meaning its less likely that you device will be properly steered towards the best option, instead using what is available quicker.

  @ikaramichev,

Almost good to go:

If you are using a combination router + modem from your ISP (AKA Gateway), there will be a setting labeled as IP Passthrough or Bridge Mode that you can enable in its interface. This will turn the Gateway into simply an old-school modem that you connect your router to.

Second, the satellite Decos will also be configured in their default state, as they will mesh with the network created by the main node. Placing them in AP mode will prevent the satellites from meshing and will prompt you to configure another network. For the satellites, all you have to do is make sure that they are powered, and you can use the Add Node option from the deco app after the main node is configured.