/etc/network/interfaces

Hello all,
I have a system that uses buildroot I built a few years ago. The
client asked that we changed the network config from a static one to dhcp, dhclient seems to be installed and so we edited /etc/network/interfaces and changed it from what it was to this:

auto lo
iface lo inet loopback

iface eth0 inet dhcp
#address 192.168.0.200
#netmask 255.255.255.0
#broadcast 192.168.0.255
#address 10.0.0.199
#netmask 255.255.255.0
#broadcast 10.0.0.255
auto eth0

This machine doesn't have a keyboard or anything and is intended to be remotely administered. Upon reboot, we don't have the IP of the machine and can't seem to find it. Is this config file above correct? Its been almost 2 years since I touched this.

Nathanael D. Noblet