/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 20.1.40.109
     netmask 255.255.255.0
     gateaway 20.1.40.1
     dns-nameservers 20.1.40.23
     up route add -net 15.17.160.0 netmask 255.255.240.0 gw 20.1.40.1   
     down route del -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1
     # post-up ip route add 15.17.160.0/20 via 20.1.40.1 dev ens33   # NOT WORKING
 
 # The primary network interface
 auto ens33
 iface ens33 inet dhcp
 

WF0006D3

# 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

auto eth0
allow-hotplug eth0



iface eth0 inet manual

auto br0
iface br0 inet dhcp
    bridge_ports eth0
    wpa-driver wired
    wpa-conf /etc/wpa_supplicant/conf/WF0006D3.conf

    # WF0017B1 Claudia
    # bridge_hw D8:CB:8A:B8:95:86

    # WF0006D3 Rafa
    bridge_hw ec:8e:b5:77:3e:e1

    # WF001CBD Rafa (Lo tiene Javier Saez)
    # bridge_hw D8:CB:8A:B8:95:51

    dns-nameservers 127.0.0.1
    up route del -net 0.0.0.0 netmask 0.0.0.0 gw 15.17.160.1
    post-up route add -net 20.1.43.0 netmask 255.255.255.0 gw 15.17.160.1
    up route add -net 22.0.0.0 netmask 255.255.255.0 gw 15.17.160.1
    # gateaway 10.23.0.1

Promisc Bridge

auto eth4
 iface eth4 inet manual
   up ifconfig $IFACE 0.0.0.0 -multicast up
   down ifconfig $IFACE down
 
 auto eth5
 iface eth5 inet manual
   up ifconfig $IFACE 0.0.0.0 -multicast up
   down ifconfig $IFACE down
 
 auto Bridge
 iface Bridge inet manual
         pre-up ifconfig eth4 0.0.0.0 promisc up
         pre-up ifconfig eth5 0.0.0.0 promisc up
         post-down ifconfig eth4 -promisc up
         post-down ifconfig eth5 -promisc up
         up ifconfig $IFACE 0.0.0.0 -multicast up
         down ifconfig $IFACE down
         bridge_ports eth4 eth5
         bridge_stp off
         bridge_fd 0
         bridge_ageing 0
         bridge_maxwait 0