tun/tap devices on 2.4.0-testX

[M.H.VanLeeuwen]

need help getting tapX devices operational on 2.4

for 2.4 using the new tun.o module I cannot create a tap0
interface.  on 2.2 it is the ethertap.o module.
changing modules.conf allows the module to load but the
interface does not come up:

ifconfig tap0 192.168.0.10 up
SIOCSIFADDR: No such device
tap0: unknown interface: No such device
tap0: unknown interface: No such device

has anyone successfully gotten this to work, if so how?

using devfs, which has created /dev/netlink/tapX devices...
symlinking /dev/netlink/tap0 /dev/tap0 doesn't help.

#define TUN_DEBUG 1, in tun.c doesn't help, fails to compile.

TIA
Martin