View Full Version : [ubuntu] TFTP Timeout in LTSP

March 29th, 2010, 12:07 PM
I'm attempting to use a Ubuntu 9.10 and 9.04 machine as a terminal server.
However, I'm running into problems with TFTP. When the clients boot
they receive an IP address, but when they try to connect to the TFTP
server, the following error is returned:

PXE-E11- ARP timeout
PXE-E11- ARP timeout
PXE-E38- TFTP cannot open connection
PXE-M0F- Exiting Intel Boot Agent

I checked to make sure that my settings were in accordance with the
advice given here, and everything checks out. My TFTP server is using
/tftpboot as root, everything is installed, and everything is enabled.
However, my clients time out when trying to connect to the server.
Anyone have any ideas?

April 5th, 2010, 12:34 PM
We would first install the Required applications step by step and then configure them later.

1.Install the Regular Ubuntu Desktop Distro, I am using ubuntu 9.04 for this howto.
2.Once Installed, update the distro and install all the necessary updates.
3.Once Done Install NFS kernel Server via this Command : sudo apt-get install nfs-kernel-server
4.Install the DHCP SERVER on the same machine,make sure there is only one dhcp server running on the network else.it will cause a conflict.
5.Set a static ip to the machine via /etc/network/interfaces file – i am using as SERVER ip for this HOWTO.
6.Now install the server module for LTSP running this command on terminal : – sudo apt-get install ltsp-server-standalone openssh-server ( this would install the LTSP Server and the openssh on the desktop.
7.Now Create your Thin Client environment on the server with this command: sudo ltsp-build-client
The First command installs the LTSP SERVER and the Second command installs the module that will provide/create the environment to run the remote disk less machines. ( Please be patient, the client module takes time to install as it fetches about 150 MB of files from the repos. )

Once the client installation is done run these 2 commands to create the ssh keys
sudo ltsp-update-sshkeys
sudo ltsp-update-image

Be sure to do it in that order.
We are now done with the installation. now comes the configuration part.

Open the /etc/default/tftpd-hpa and edit first line Run_Daemon to “Yes” in place of NO.Save and Exit.
Now Open the /etc/ltsp/dhcpd.conf and change some values to the file as below.uncomment value next-server and put the server ip infromt of it ( next-server; )
add these two values below that :
allow booting;
allow bootp;
now go to the last line of the dhcpd.conf and it has a default value : filename ( ”/ltsp/i386/nbi.img”; ) change that to ( filename “pxelinux.0″; )
Once done save and exit and restart the dhcp server /etc/init.d/dhcp3-server restart
Once done now u can just Boot the diskless workstations and it should aautomatically find the dhcp server get an IP address and load the Remote OS. and Login.

August 26th, 2010, 07:33 PM
go to steps.

(1) First i installed ltsp stand alone
sudo apt-get install ltsp-server-standalone openssh-server

(2) Second i build client
sudo ltsp-build-client --arch i386

(3) And then run the below commands

sudo ltsp-update-sskeys
sudo ltsp-update-image

end, no error :p