Dual Configuration Intel FPGA IP Core allows you to perform remote system upgrade (RSU).
Basically, you can control the remote system upgrade circuitry by using "Dual Configuration Intel FPGA IP Core Avalon-MM Address Map" (on page 60)
Below picture is my Platform Designer example for RSU design.
I instantiate "JTAG to Avalon Master Bridge" in my design as I want to control the remote system upgrade circuitry via JTAG.
For more details, you can follow the following reference design:
I hope this will help.