I am about to start working on an embedded system which runs kernel v2.6.x.
It is configured to use its serial line as a TTY (accessible via e.g. minicom, stty), but I want to run IP over the serial line so that I can run multiple multiplexed sessions over the link (e.g. via UDP/TCP or SSH).
I don't have much more information about the boards yet (will post more when the documentation arrives), but assuming that the kernel provides reasonable abstraction over the hardware - what would be the process to configure it to run PPP or (C)SLIP over the serial link in place of TTY?