So many routers use a switch to serve the 4 LAN/WAN ports with internal VLAN to split them out, and one or two CPU connected ETH0/ETH1 over RGII
Like this one on the TP-Link C2600, but it is common enough, my C1750 has the same but I could not find such a nice picture.
So I am wondering: If the RGII is also limited to 1Gbps. (as per spec) how is it possible that my router gets a 800Mbps routing performance? I would think there would be a 500Mbps theoretical limit. (tested with iperf3 using software ofloading turned on)