DragonFlyBSD

zoidberg# ifconfig wlan0 create wlandev ral0
wlan0: bpf attached
wlan0: bpf attached
wlan0: MAC address: 00:08:a1:b5:39:5b
zoidberg# ifconfig wlan0 up
ral0: need multicast update callback
ral0: need multicast update callback

<frozen>

I can escape to debugger but 'call dumpsys' panics (see attached picture) the box and it freezes completely and I have to reset it so there's no dump.

Workaround: up ral before upping wlan0 or for rc starts something like echo "ifconfig ral0 up" > /etc/start_if.wlan0