[seL4] Question for student research

Hi. I am mentoring a student group trying to do some work on SEL4. We are trying to setup basic TCP/IP networking and are really struggling to find documentation or up-to-date guides. We found a project that has networking (it even has some filesystem and a small webserver as part of the project). We thought we just about had the networking component working for QEMU but there seems to be issues with QEMU and networking, at least the way we did it. Does anyone have any how-to guides for getting basic networking up and running? If QEMU is not great for networking, please suggest a development board. Thanks much.