Linux - IPIP tunnel

ip tunnel add pippo mode ipip local 192.168.213.7 remote 192.168.213.8
ip addr add 192.168.216.6/30 dev pippo
ip link set dev pippo up

ip tunnel add pluto mode ipip local 192.168.213.8 remote 192.168.213.7
ip addr add 192.168.216.5/30 dev pluto
ip link set dev pluto up