Dear ahmed_elkhatib!
Currently, almost all broadband access modes are asymmetrical access modes. The downstream bandwidth is much larger than the upstream bandwidth. To ensure a stable connection of devices, the upstream bandwidth function is not required. Only the function of limiting the downstream bandwidth is required. Therefore, on the web page, generally, there is no window for restricting the upstream bandwidth.

The DG8045 device is usually connected to the carrier's network, and the other end is connected to the customer's terminal (such as a computer, mobile phone, or tablet). If you want to connect to a switch, this is a non-standard networking mode. Therefore, the feasibility of this solution cannot be verified.
If you really want to connect to the switch, contact your local device provider for technical support.
Thank you !