host A: int e0 ip addr 10.0.0.1 255.255.255.0 int t0 ip addr 10.0.1.1 255.255.255.0 tu so 10.0.0.1 tu de 10.0.0.2 tu mo ipip host B: int e0 ip addr 10.0.0.2 255.255.255.0 int t0 ip addr 10.0.1.2 255.255.255.0 tu so 10.0.0.2 tu de 10.0.0.1 tu mo ipip