ip address add 10.255.12.1/30 dev r12
ip link set dev r12 up
ip address add 10.255.13.1/30 dev r13
ip link set dev r13 up
ip address add 10.10.0.1/24 dev lan0
ip link set dev lan0 up
ip address add 10.255.0.1/32 dev lo
ip link set dev lo up
sysctl -w net.ipv4.ip_forward=1
