Comment 8 for bug 35328

Sorry for the delay.

On breezy:

/etc/network/interfaces:

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

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
 script grep
 map eth0

# The primary network interface
iface eth0 inet static
address 10.0.0.2
netmask 255.0.0.0
gateway 10.0.0.138

auto eth0

iface dsl-provider inet ppp
provider dsl-provider

ifconfig -a output:

eth0 Link encap:Ethernet HWaddr 00:0A:E6:AC:11:3E
          inet addr:10.0.0.2 Bcast:10.255.255.255 Mask:255.0.0.0
          inet6 addr: fe80::20a:e6ff:feac:113e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:9063 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9344 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7045245 (6.7 MiB) TX bytes:2092521 (1.9 MiB)
          Interrupt:19 Base address:0xd400

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:1632 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1632 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:454764 (444.1 KiB) TX bytes:454764 (444.1 KiB)

sit0 Link encap:IPv6-in-IPv4
          NOARP MTU:1480 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 (0.0 b) TX bytes:0 (0.0 b)

In dapper:

/etc/network/interfaces:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 10.0.0.2
netmask 255.0.0.0
gateway 10.0.0.138

ifconfig is unspupported on dapper