petitemort:~# cat > /etc/network/interfaces <<EOF
> auto lo
> iface lo inet loopback
> auto eth1
> iface eth1 inet dhcp
> EOF
petitemort:~# ifup lo
petitemort:~# ifup eth1
Internet Systems Consortium DHCP Client V3.0.4
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

eth1: link up, 10Mbps, half-duplex, lpa 0x0400
Listening on LPF/eth1/00:31:2d:78:81:01
Sending on   LPF/eth1/00:31:2d:78:81:01
Sending on   Socket/fallback
DHCPDISCOVER on eth1 to 255.255.255.255 port 67 interval 7
DHCPOFFER from 10.0.2.2
DHCPREQUEST on eth1 to 255.255.255.255 port 67
DHCPACK from 10.0.2.2
bound to 10.0.2.15 -- renewal in 42212 seconds.
petitemort:~#