Installation client OpenMPTCP sur Raspberry Pi

You don't need ethernet adapters, only a switch is enough. Modems doesn't need to be directly connected to RPI ethernet port.

Download the image, then copy it to a sdcard.

https://www.openmptcprouter.com/download

You can use etcher graphical interface available for Windows, Linux and MacOS.

You can also use this commands under Linux:

gunzip openmptcprouter-*.img.gz
dd bs=4M if=openmptcprouter-*.img of=/dev/sdX conv=fsync

The Raspberry PI is then available at ip 192.168.100.1

Source : https://github.com/Ysurac/openmptcprouter/wiki/Router-install