Le fichier /etc/network/interfaces permet de configurer les interfaces réseaux. Voici quelques exemples de configurations :

L'interface wlan0 (interne au RPi3) n'est pas utilisée.

$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
 
# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'
 
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
 
auto lo
iface lo inet loopback
 
iface eth0 inet manual
 
# Désactiver l'interface wlan0 (interne) sur un Raspberry Pi 3:
#allow-hotplug wlan0
#iface wlan0 inet manual
#    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
 
allow-hotplug wlan1
iface wlan1 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf