Seems like it only happends when there is trafic.
Mar 16 08:29:23 kernel: dc0: link state changed to DOWN
Mar 16 01:56:46 kernel: dc0: link state changed to DOWN
The time that i was sleeping it didnt fail.
Dunno if this helps.
LAN interface (dc0)
Status up
IP address 192.168.0.1
Subnet mask 255.255.255.0
Media 10baseT/UTP
In/out packets 2258538/2942016 (633.59 MB/2.52 GB)
In/out errors 0/0
Collisions 319902
Do i get all those collisions because i use a hub, and not a switch?