Dhcp3-server fails to start after reboot

DHCP requires a static IP address and is looking for it here - /etc/network/interfaces. But Ubuntu 8.10 uses NetworkManager 0.7 which does not write static IP configuration to /etc/network/interfaces .

See bug #256054 - [intrepid] new 0.7 branch ignores /etc/network/interfaces:

If you rely on your network connection being constantly up during boot, you have to disable NetworkManager for the time being.

Remove the NetworkManager:

sudo update-rc.d NetworkManager remove

You can also uninstall NetworkManager:

sudo apt-get remove network-manager

Set manually static IP:

sudo gedit /etc/network/interfaces

and add:

auto eth0 

iface eth0 inet static

address 192.168.1.10

netmask 255.255.255.0

network 192.168.1.1

broadcast 192.168.1.255

gateway 192.168.1.1 

Save the file and close gedit.

Configure default nameserver:

sudo gedit /etc/resolv.conf

and add:

nameserver 192.168.1.1 

save the file and close gedit.

Configure default interfaces for DHCP:

sudo gedit /etc/default/dhcp3-server

find this line:

INTERFACES=""

and replace with:

INTERFACES="eth1"

save the file and close gedit.

Restart Networking:

sudo /etc/init.d/networking restart

Reboot your LTSP serve and check if DHCP is started in syslog.