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Where can i find net.link.ether.inet.allow_multicast

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  • H
    hsv
    last edited by Aug 25, 2017, 9:28 PM

    Hi
    I have problems with Windows Network Load Balancing where multicast has been used.
    In System General log I can see this "kernel  arp: 03:bf:c0:a8:0b:e1 is multicast"
    Where 03:bf:c0:a8:0b:e1 is the NLB mac address.

    But I can not ping from the virtual IP from the HA cluster setup and not from the local IP of the 2 firewalls in the HA cluster or the other way from the multicast IP.
    And yes I use the newest version from today: 2.4RC built on Thu Aug 24 16:53:08 CDT 2017

    Thanks
    Henning

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    • D
      Derelict LAYER 8 Netgate
      last edited by Aug 25, 2017, 9:35 PM

      Sounds like something that can be placed in System > Advanced, System Tunables

      You can check the current value with:

      sysctl net.link.ether.inet.allow_multicast

      Either on the console/ssh or in Diagnostics > Command Prompt

      The default looks to be 0.

      You can manually set it with:

      sysctl -w net.link.ether.inet.allow_multicast=1

      Chattanooga, Tennessee, USA
      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
      Do Not Chat For Help! NO_WAN_EGRESS(TM)

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      • H
        hsv
        last edited by Aug 26, 2017, 8:28 PM

        Hi
        That was the solution.

        But in 2.4RC this option is missing in System > Advanced, System Tunables

        Also I could not login with SSH as I got an error that Putty could not understand the SSH key.

        Thanks

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        • D
          Derelict LAYER 8 Netgate
          last edited by Aug 26, 2017, 10:02 PM

          But in 2.4RC this option is missing in System > Advanced, System Tunables

          So create it. You are not limited to what is listed there. You can do any sysctl that can be set after boot.

          Those that must be present at boot time can be set in /boot/loader.conf.local

          Chattanooga, Tennessee, USA
          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
          Do Not Chat For Help! NO_WAN_EGRESS(TM)

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          • H
            hsv
            last edited by Sep 27, 2017, 4:25 PM

            Hi
            Thanks for letting me know about loader.conf.local

            But it looks like there are a lots of features hidden. Where can I find a list over all the sysctl settings.

            And thanks again

            Regards
            Henning

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            • D
              Derelict LAYER 8 Netgate
              last edited by Sep 27, 2017, 4:31 PM

              You probably want the FreeBSD docs for that.

              Starting point: https://www.freebsd.org/cgi/man.cgi?query=sysctl&apropos=0&sektion=0&manpath=FreeBSD+11.0-RELEASE&arch=default&format=html

              Chattanooga, Tennessee, USA
              A comprehensive network diagram is worth 10,000 words and 15 conference calls.
              DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
              Do Not Chat For Help! NO_WAN_EGRESS(TM)

              1 Reply Last reply Reply Quote 0
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