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    udhcpc: sending discover

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    • george1421G
      george1421 Moderator @tech49
      last edited by george1421

      @tech49 The other thing I would recommend is that you add an echo statement just above the sleep 27 like echo "Sleeping for a bit"; to be sure that the code is executing like we think. Let me go and get the github page so we can be sure.

      The other thing is to (with the fog delivered inits) pxe boot into debug mode and then key in /sbin/udhcpc -i $iface --now replacing $iface with the name of your physical network adapter collected with the ip addr show command.

      This is the line in question https://github.com/FOGProject/fos/blob/master/Buildroot/board/FOG/FOS/rootfs_overlay/etc/init.d/S40network#L38, where the echo and sleep command needs to be inserted.

      Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

      T 2 Replies Last reply Reply Quote 0
      • T
        tech49 @Sebastian Roth
        last edited by

        @Sebastian-Roth

        Wait till the interface is fully up and ready (spanning tree)

        timeout=0
        linkstate=0
        until [[ $linkstate -eq 1 || $timeout -ge 35 ]]; do
            let timeout+=1
            linkstate=$(/bin/cat /sys/class/net/$iface/carrier)
            [[ $linkstate -eq 0 ]] && sleep 1 || break
        done
        [[ $linkstate -eq 0 ]] && echo "No link detected on $iface for $timeout seconds, skipping it." && continue
        for retry in $(seq 3); do
            sleep 27
            /sbin/udhcpc -i $iface --now
            ustat="$?"
            curl -Ikfso /dev/null "${web}"/index.php --connect-timeout 5
            cstat="$?"
            # If the udhcp is okay AND we can curl our web
            # we know we have link so no need to continue on.
            # NOTE: the link to web is kind of important, just
            # exiting on dhcp request is not sufficient.
            [[ $ustat -eq 0 && $cstat -eq 0 ]] && exit 0
            echo "Either DHCP failed or we were unable to access ${web}/index.php for connection testing."
            sleep 1
        done
        echo "No DHCP response on interface $iface, skipping it."
        

        done

        If we end up here something went wrong as we do exit the script as soon as we get an IP

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        • T
          tech49 @george1421
          last edited by

          @george1421 How do I pxeboot into debug mode?

          george1421G 1 Reply Last reply Reply Quote 0
          • T
            tech49 @george1421
            last edited by

            @george1421 Is it worth modifying anything in init_32.xz?

            george1421G 1 Reply Last reply Reply Quote 0
            • george1421G
              george1421 Moderator @tech49
              last edited by

              @tech49 said in udhcpc: sending discover:

              @george1421 How do I pxeboot into debug mode?

              When you schedule a task (capture or deploy) before you hit the schedule task button tick the debug checkbox. Then pxe boot the target computer.

              The idea with this route is to manually wait the 27 seconds before manually issuing the udhcp command. Your issue may be totally different if time doesn’t fix the dhcp issue (i.e. your computer uses one of the new realtek nic chip sets) .

              Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

              T 1 Reply Last reply Reply Quote 0
              • george1421G
                george1421 Moderator @tech49
                last edited by

                @tech49 said in udhcpc: sending discover:

                @george1421 Is it worth modifying anything in init_32.xz?

                Not unless you are working with 32 bit hardware (not likely now days)

                Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

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                • T
                  tech49 @george1421
                  last edited by

                  @george1421
                  Ok, I entered in the Echo line and repackaged the file with the guide on the wiki.

                  The echo command did not work. I saw nothing saying “Sleeping for a bit”

                  george1421G 1 Reply Last reply Reply Quote 0
                  • george1421G
                    george1421 Moderator @tech49
                    last edited by george1421

                    @tech49 What version of FOG are you using? Oh I see it never mind. Let me do this to the inits.

                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                    1 Reply Last reply Reply Quote 0
                    • george1421G
                      george1421 Moderator
                      last edited by

                      OK here is the modified init: https://drive.google.com/open?id=1ZDLcftq_yx3c0BiIAVhNwwpn2j-gDzCE

                      If this fails to print the sleep 27 we will need a screen shot of what you see when it fails because it should print the waiting a bit .

                      Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                      T 2 Replies Last reply Reply Quote 0
                      • T
                        tech49 @george1421
                        last edited by tech49

                        @george1421 No echos seen

                        I saved the file to my desktop and did sudo cp -r /home/username/desktop /var/www/fog/…/ipxe… I browsed to it on the GUI and confirmed on properties it was modified the time id id so.

                        The output I got after a quick host registration was
                        populating .dev: done
                        initializing random number done
                        starting haveged: ok
                        starting enp1so interface and waiting fof the link to come up
                        udhcpc: started v1.29.3
                        udhcpc: sending discover
                        udhcpc: sending discover
                        udhcpc: sending discover
                        udhcpc: no lease, failing
                        Either DHCP failed or we were unable to access http://fogserveripaddress/fog//index.php for connection testing.
                        repeat 3 times
                        No DHCP respawn on interface enp1s0 , skipping it.
                        failed to get an ip via dhcp, tried on interfaces enp1s0

                        Note: I’m using a laptop for the fog server , Dell latitude e5420 Bios: LegacyBoot Secure off
                        I’m trying to do a Quick or Full host registration on a Dell Optiplex 3050. Bios: Uefi on SecureBoot on

                        Both confirmed pxe on

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                        • T
                          tech49 @george1421
                          last edited by tech49

                          @george1421 I got it to work! I plugged a dumb switch inbetween the managed ciscos and the PC i was trying to pxe boot. I’m thinking there is a power saving issue setup that keeps it from powering on

                          Now here’s another problem.

                          When its at
                          *Start host registration
                          *Enter hostname for this computer:

                          I’m going to reinstall fog from scratch i think

                          I cannot type anything !!!

                          Much love to you developers who have helped this linux noob out with this problem. It’s been super educational ❤

                          george1421G Q 2 Replies Last reply Reply Quote 0
                          • george1421G
                            george1421 Moderator @tech49
                            last edited by

                            @tech49 said in udhcpc: sending discover:

                            I plugged a dumb switch inbetween the managed ciscos and the PC i was trying to pxe boot

                            We have seen this condition as a spanning tree issue (not using one of the fast spanning tree protocols like portFast or RSTP. Also we see this condition with the green ethernet settings on the switch getting confused and powering off the port. Placing a dumb switch in between the building switch and the pxe booting computer keeps the building switch active while PXE hands off to iPXE and then iPXE hands off to FOS Linux. Every time this hand off happens it drops the ethernet link momentarily. The switch sees this as a disconnect/reconnect.

                            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!

                            1 Reply Last reply Reply Quote 0
                            • Q
                              Quazz Moderator @tech49
                              last edited by

                              @tech49 Please make a new thread for the new issue so we can help you there. (since it’s unrelated to the thread)

                              1 Reply Last reply Reply Quote 1
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