# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
 
# The loopback interface
auto lo
iface lo inet loopback
# Wireless interfaces
#
# Example of an unencrypted (no WEP or WPA) wireless connection
# that connects to any available access point:
#
iface wlan0 inet dhcp
        wireless_mode managed
        wireless_essid any
#
#
# Same as above but locked to a specific access point:
#
#iface wlan0 inet dhcp  
#       wireless_mode managed
#       wireless-essid some-essid
#
# A WEP encrypted connection locked to a specific access point:
#
#iface wlan0 inet dhcp  
#       wireless-essid some-essid
#       wireless-key s:My-PlainText-Password
#       wireless-mode managed                  
#
# A WPA1 or WPA2 encrypted connection locked to a specific access point.
# This is the best option for non-roaming, single-network usage.
# Note that your card may require a firmware update to use WPA. 
# Some distributions install a temporary volatile firmware update on ifup.
#
#iface wlan0 inet dhcp                                                   
#       wpa-essid some-essid                                          
#       wpa-psk My-PlainText-Password                                              
#
# A WPA1 or WPA2 encrypted connection using an external configuration file
# for wpa-supplicant. This is the way to go if you need to configure multiple
# networks with different keys and / or WPA settings and roaming support.
#
# iface wlan0 inet dhcp
#    wpa-conf /etc/wpa_supplicant.conf
#    wpa-driver hostap



iface atml0 inet dhcp

# Wired or wireless interfaces
auto eth0
iface eth0 inet dhcp
iface eth1 inet dhcp

# Ethernet/RNDIS gadget (g_ether) or LAN9514
auto usb0
iface usb0 inet static
        address 10.9.0.74
        netmask 255.0.0.0
        network 10.9.0.0
        broadcast 10.255.255.255
        gateway 10.9.0.74

# Bluetooth networking
iface bnep0 inet dhcp

root@beagleboard:~# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0  TX bytes:0

usb0      Link encap:Ethernet  HWaddr BE:0C:17:8F:0E:E4
          inet addr:10.9.0.74  Bcast:10.255.255.255  Mask:255.0.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1492  Metric:1
          RX packets:23531 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10909 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:24263270  TX bytes:949645

root@beagleboard:~# cat /etc/network/interfaces 
# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
 
# The loopback interface
auto lo
iface lo inet loopback
# Wireless interfaces
#
# Example of an unencrypted (no WEP or WPA) wireless connection
# that connects to any available access point:
#
iface wlan0 inet dhcp
        wireless_mode managed
        wireless_essid any
#
#
# Same as above but locked to a specific access point:
#
#iface wlan0 inet dhcp  
#       wireless_mode managed
#       wireless-essid some-essid
#
# A WEP encrypted connection locked to a specific access point:
#
#iface wlan0 inet dhcp  
#       wireless-essid some-essid
#       wireless-key s:My-PlainText-Password
#       wireless-mode managed                  
#
# A WPA1 or WPA2 encrypted connection locked to a specific access point.
# This is the best option for non-roaming, single-network usage.
# Note that your card may require a firmware update to use WPA. 
# Some distributions install a temporary volatile firmware update on ifup.
#
#iface wlan0 inet dhcp                                                   
#       wpa-essid some-essid                                          
#       wpa-psk My-PlainText-Password                                              
#
# A WPA1 or WPA2 encrypted connection using an external configuration file
# for wpa-supplicant. This is the way to go if you need to configure multiple
# networks with different keys and / or WPA settings and roaming support.
#
# iface wlan0 inet dhcp
#    wpa-conf /etc/wpa_supplicant.conf
#    wpa-driver hostap



iface atml0 inet dhcp

# Wired or wireless interfaces
auto eth0
iface eth0 inet dhcp
iface eth1 inet dhcp

# Ethernet/RNDIS gadget (g_ether) or LAN9514
auto usb0
iface usb0 inet static
        address 10.9.0.74
        netmask 255.0.0.0
        network 10.9.0.0
        broadcast 10.255.255.255
        gateway 10.9.0.74

# Bluetooth networking
iface bnep0 inet dhcp