> I used the switch eth0=tuntap,,,192.168.x.x while booting UML. I see
> that IP is assigned to tap0 interface on the host. Inside UML I do a
> ifconfig eth0 10.0.0.3 up
> When I try to ping a host interface from UML, I get a
> sendto: Network is unreachable.
If you're going to put the two ends of the tap device on different networks,
you'd better learn how to set up routing appropriately.