sudo ip address flush dev eth0 scope global
sudo ip route flush
sudo ip address add 192.168.3.96/21 dev eth0
sudo ip route add default via 192.168.0.100 dev eth0
sudo ip route add default via 192.168.0.102 dev eth0
sudo ip route add default via 192.168.0.103 dev eth0
ip addr show dev eth0
ip route show dev eth0