Using route
command:
route add -net 172.17.0.0/16 gw 192.168.250.254 dev eth1
route add -net 192.168.0.0/16 gw 192.168.250.254 dev eth1
Writing on config file(/etc/netplan/01-foo.yaml
):
network:
version: 2
renderer: networkd
ethernets:
eth1:
addresses:
- 192.168.1.10/24
routes:
- to: 192.168.2.0/16
via: 192.168.250.254
- to: 172.17.0.0/16
via: 192.168.250.254