# ip route 10.0.0.0/24 dev eth0 proto kernel scope link src 10.0.0.2 default via 10.0.0.1 dev eth0
ip route change default via 10.0.0.1 dev eth0 src 10.0.0.3
# ip route 10.0.0.0/24 dev eth0 proto kernel scope link src 10.0.0.2 default via 10.0.0.1 dev eth0 src 10.0.0.3