The “Load Balance Broadband Router” systems are useful for aggregating multiple Internet connections (WAN) to our local network (LAN).
These systems do NOT aggregate the bandwidth of the two connections or more that we have but divide the traffic of our local network (LAN) on all the Internet connections that we have. See image above.
In this case we use the TP-Link TL-R470T+ v6.0 Load Balance Broadband Router that, for default, is configure in this way:
Port 1 and 2 == WAN
Port 3, 4, and 5 == LAN
Of course is possible change the configuration as you want.