default dev wlan0 scope link
default via 172.21.240.1 dev eth0 proto kernel
default via 172.30.1.1 dev eth0 proto dhcp src 172.30.1.112 metric 100 
default via 172.20.2.1 dev wlan0 proto dhcp src 172.20.3.163 metric 600 
172.20.2.0/23 dev wlan0 proto kernel scope link src 172.20.3.163 metric 600 
172.30.1.0/24 dev eth0 proto kernel scope link src 172.30.1.112 metric 100 