TFTP PXE-E32 Time OUT



  • Greetings everyone, your help , advice much appreciated. I am using fog 5-6 months. It was just fine with Ubuntu and Windows Server 2012 DHCP .
    Now i have installed another Fog server in another place , again used Ubuntu 18.04 Bionic Beaver and Linux DHCP server . My Fog Server gives error TFTP Time out .
    Paralel i have installed another Windows Server 2012 and Configured DHCP there ( option 66, 67 also ) . It is fun that , this time it worked . I have successfully cloned and captured image with clone.
    My Question is : what am missing in ISC-DHCP server in linux? in /etc/dhcp/dhcpd.conf file i added both 66 and 67 options with “tftp-server-name” and " undionly.kpxe " .
    Guys , please it is really important and urgent, your kind help much much appreciated.



  • Dear george1421 ,
    Finally i solved my problem. For Future guys ,
    you need to add this line also to your /etc/dhcp/dhcpd.conf file .
    next-server and some ip address , like : next-server 192.168.x.x.
    my mistake was that i was writing it with “option” word . But next-server is string and it must be without option word. 🙂
    Thank you for your support ,
    This can be marked as solved .
    Good Luck to all.



  • Dear george1421 ,
    Finally i solved my problem. For Future guys ,
    you need to add this line also to your /etc/dhcp/dhcpd.conf file .
    next-server and some ip address , like : next-server 192.168.x.x.
    my mistake was that i was writing it with “option” word . But next-server is string and it must be without option word. 🙂
    Thank you for your support ,
    This can be marked as solved .
    Good Luck to all.


  • Moderator

    @Mammadoff said in TFTP PXE-E32 Time OUT:

    my fog works only on bios, Can’t boot from UEFI

    That article explains how to adjust both Linux as well as Windows 2012 DHCP and later to dynamically support both bios and uefi systems. The process does work well.

    If you still can not get it to work I have instructions on how to capture the pxe booting process with tcpdump so that we can understand what is going down the network wire. But lets save that until we find out if you have the dhcp server configured correctly.



  • Dear george1421 , thank you for your promp response. DHCP is in another linux server , Fog is in seperate . i will check this link . Interesting part is that it does work if i push DHCP from Windows Server , not from Linux .
    beside, my fog works only on bios, Can’t boot from UEFI.
    Your advice much appreciated.


  • Moderator

    Did you install the dhcp server as part of the FOG install or is the dhcp server on another linux server?

    If the dhcp server is part of the FOG install, it should just work because the fog installer will configure it. If the dhcp server is on another server then take a look at this post: https://wiki.fogproject.org/wiki/index.php/BIOS_and_UEFI_Co-Existence#Example_1

    This wiki page will show you how to setup the isc-dhcp server to serve both bios and uefi pxe boot file names.


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