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Some PCs fail on multicast after starting

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  • T
    tesparza
    last edited by tesparza Jul 29, 2020, 12:55 PM Jul 29, 2020, 6:38 PM

    Picture error

    I get this error but the log file does app in server. Put of 24 around 9 fail.

    1 Reply Last reply Reply Quote 0
    • G
      george1421 Moderator
      last edited by Jul 29, 2020, 7:16 PM

      It almost sounds like a network error with this one. The actually error message we need to see is printed seemingly random on the blue background partclone screen. This log file is actually on the target computer in the FOS Linux system. It unfortunately disappears when the target system is rebooted.

      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 Jul 29, 2020, 7:41 PM Reply Quote 0
      • T
        tesparza @george1421
        last edited by Jul 29, 2020, 7:41 PM

        @george1421
        We are running this off a Layer 3 switch. Switch takes care of dhcp and ipxe boot file. And are running it in a closed network, just fog server and 24 ethernet lines.

        G 1 Reply Last reply Jul 29, 2020, 8:37 PM Reply Quote 0
        • G
          george1421 Moderator @tesparza
          last edited by Jul 29, 2020, 8:37 PM

          @tesparza OK so everything is on a single network switch and you are multicasting? Did you enable igmp snooping on your network switch.

          I do have to say with multicasting about 90% of the problems come from infrastructure and not fog. That’s not saying there isn’t a problem with FOG, just most of the time the problem is elsewhere.

          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 Jul 29, 2020, 10:17 PM Reply Quote 0
          • T
            tesparza @george1421
            last edited by Jul 29, 2020, 10:17 PM

            @george1421
            Do you recommend and Layer 3 switch or just a regular switch?

            G 1 Reply Last reply Jul 29, 2020, 10:22 PM Reply Quote 0
            • G
              george1421 Moderator @tesparza
              last edited by Jul 29, 2020, 10:22 PM

              @tesparza said in Some PCs fail on multicast after starting:

              Layer 3 switch or just a regular switch

              Unless you are doing routing in an L3 switch, for what you are doing (multicasting) an L2 or L3 switch will work just fine. We have seen with some of the non-enterprise switches the switch fabric is not fast enough to multicast to all of the ports at the same time. If you have an enterprise class switch made since 2008 the switch should be just fine from a performance standpoint.

              Now your L3 switch, I assume it has a web ui? If so did you enable igmp snooping on that switch?

              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 Jul 30, 2020, 12:55 AM Reply Quote 0
              • T
                tesparza @george1421
                last edited by Jul 30, 2020, 12:55 AM

                @george1421

                We are using a Cisco 3750 layer 3. I need to double check igmp snooping setting. I’ve never had this problem until this week. Since we are using the switch only. A setup at another school was through the router and we never had setup.

                G 1 Reply Last reply Jul 30, 2020, 1:28 AM Reply Quote 0
                • G
                  george1421 Moderator @tesparza
                  last edited by Jul 30, 2020, 1:28 AM

                  @tesparza If unicasts are fine, but multicasts are not then I would start with the igmp snooping. There may be another command that needs to be enabled for the catalyst line. I seem to remember there is but can’t remember the details at the moment.

                  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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