auto enX1
iface enX1 inet static
    address 10.209.0.24
    netmask 255.255.224.0
    up route add -net 10.208.0.0 netmask 255.240.0.0 gw 10.209.0.1 || true
    down route del -net 10.208.0.0 netmask 255.240.0.0 gw 10.209.0.1 || true
    up route add -net 10.176.0.0 netmask 255.240.0.0 gw 10.209.0.1 || true
    down route del -net 10.176.0.0 netmask 255.240.0.0 gw 10.209.0.1 || true