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DHCP Timeout after Linux begins to boot

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FOG Problems
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  • 2
    2cool4me4
    last edited by Sep 15, 2016, 2:59 PM

    Hey all,

    Unfortunately this looks like a duplicate of https://forums.fogproject.org/topic/4048/dhcp-lease-timeout-issue, but that happened about two years ago. I’m trying to set up FOG in a lab that has Spanning Tree enabled, so switches won’t open the port for about fifteen seconds after the NIC comes up. The FOG init tries to get a DHCP lease a few times, fails, then prompts to reboot the system.

    In the linked forum post, it’s stated that a 60 second timeout was added. I assume that this changed at some point. How would I be able to add this delay back so that I’m able to successfully use FOG tools on them?

    Debian Jessie
    Intel Xeon 5130
    2GB RAM

    If you ever need it, you know…

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    • G
      george1421 Moderator
      last edited by george1421 Sep 15, 2016, 9:06 AM Sep 15, 2016, 3:05 PM

      You can have spanning tree enabled (and should), but you need to enable one of the fast stp protocols (port fast, fast stp, rstp, and a few others I can’t remember). Standard spanning tree takes 27 seconds to start to forward data while it listens for other infrastructure devices.

      And yes (depending on what version of fog you’re running the boot process has changed greatly).

      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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      • 2
        2cool4me4
        last edited by 2cool4me4 Sep 15, 2016, 9:36 AM Sep 15, 2016, 3:24 PM

        Thanks, george. I’ll see if I can get that done. I might not be able to, though. Is there any workaround that I can use to get this running until I’m able to make the change?

        Debian Jessie
        Intel Xeon 5130
        2GB RAM

        If you ever need it, you know…

        G 1 Reply Last reply Sep 15, 2016, 3:38 PM Reply Quote 0
        • G
          george1421 Moderator @2cool4me4
          last edited by Sep 15, 2016, 3:38 PM

          @2cool4me4 put an unmanaged (dumb) switch between the building switch and the target computer.

          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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          • 2
            2cool4me4
            last edited by Sep 15, 2016, 3:44 PM

            Understood. I’ll see what I can do and report back. I won’t be in that lab for a few hours.

            Debian Jessie
            Intel Xeon 5130
            2GB RAM

            If you ever need it, you know…

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            • 2
              2cool4me4
              last edited by Sep 16, 2016, 1:00 AM

              The unmanaged switch works until I can get into the switches to enable a different STP.

              Debian Jessie
              Intel Xeon 5130
              2GB RAM

              If you ever need it, you know…

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              • 2
                2cool4me4
                last edited by Sep 21, 2016, 4:18 PM

                The switch did not support any faster methods of STP, or they did not work. Disabling STP altogether is a calculated risk that we took, and it has fixed the problem.

                This issue is solved.

                Debian Jessie
                Intel Xeon 5130
                2GB RAM

                If you ever need it, you know…

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