root@Ocommon:~# cat /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#auto ens32
iface ens32 inet static
address 1.1.1.2
netmask 255.255.255.0
gateway 1.1.1.1

#auto ens33
iface ens33 inet static
address 2.2.2.2
netmask 255.255.255.0
gateway 2.2.2.1

#auto ens34
iface ens34 inet static
address 3.3.3.2
netmask 255.255.255.0
gateway 3.3.3.1

#auto ens35
iface ens35 inet dhcp

cat >/etc/init.d/configNetwork<<EOF11
ifup ens32
ifup ens33
ifup ens34
ifup ens35
route add -net 1.1.1.0 gw 1.1.1.1
route add -net 2.2.2.0 gw 2.2.2.1
route add -net 3.3.3.0 gw 3.3.3.1
route del default gw 1.1.1.1 
route add default gw 192.168.137.2 dev ens35
EOF11
chmod 111 /etc/init.d/configNetwork
sed -i '/exit 0/i\bash /etc/init.d/configNetwork' /etc/rc.local