$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:e0:18:bb:0c:68  
          UP BROADCAST MULTICAST  MTU:1500  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:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:16 Base address:0x9800 

eth1      Link encap:Ethernet  HWaddr 00:14:c1:32:4b:8c  
          inet addr:192.168.1.143  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::214:c1ff:fe32:4b8c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5109 errors:0 dropped:0 overruns:0 frame:0
          TX packets:244 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:685873 (669.7 KB)  TX bytes:32376 (31.6 KB)
          Interrupt:17 Base address:0x4000 

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:139917 errors:0 dropped:0 overruns:0 frame:0
          TX packets:139917 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:6999198 (6.6 MB)  TX bytes:6999198 (6.6 MB)

/etc/network/interfaces

auto lo
iface lo inet loopback


iface eth0 inet dhcp
address 192.168.1.143
netmask 255.255.255.0
gateway 192.168.1.1

auto eth1
iface eth1 inet static
address 192.168.1.143
netmask 255.255.255.0
gateway 192.168.1.1

auto eth2
iface eth2 inet static
address 192.168.1.143
netmask 255.255.255.0
gateway 192.168.1.1

auto ath0
#iface ath0 inet dhcp

auto wlan0
#iface wlan0 inet dhcp