Automatic stuff sucks.

wouter@anything:~$ sudo ip link set eth0 up
wouter@anything:~$ ip route show dev eth0  proto kernel  scope link  src
wouter@anything:~$ sudo ip route add default via
RTNETLINK answers: Network is unreachable
wouter@anything:~$ ip route show
wouter@anything:~$ apt-get --purge remove network-manager

Yes, this really happened, and no, there were no pauses between the different commands except for the time needed for me to type them out.