#Setting addreses
h1 ip addr del 10.0.0.1/8 dev h1-eth0
h1 ip addr add 172.16.20.10/24 dev h1-eth0

h2 ip addr del 10.0.0.2/8 dev h2-eth0
h2 ip addr add 172.16.10.10/24 dev h2-eth0

h3 ip addr del 10.0.0.3/8 dev h3-eth0
h3 ip addr add 192.168.30.10/24 dev h3-eth0

#Setting default route to the hosts
h1 ip route add default via 172.16.20.1

h2 ip route add default via 172.16.10.1

h3 ip route add default via 192.168.30.1