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    Interface on Half-Duplex without any reason?

    Scheduled Pinned Locked Moved General pfSense Questions
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    • J Offline
      jonnyD
      last edited by

      Hello,

      i am trying to configure our new ISP (Colt) on our pfsense appliance (scope-7).

      Our ISP told us to configure the WAN interface for 100mbit full duplex.
      The autodetect functions sets it to 100mbit half duplex and forcing full duplex has no effect at all.

      We do not get any packets back from our ISP and i guess it has something to do with the wrong duplex mode.

      Any ideas why that happens?

      Thanks.

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      • W Offline
        W4RH34D
        last edited by

        If it negotiated that then there is a problem.  Bad cable, jack or device.

        Ethernet 101.

        Did you really check your cables?

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        • MikeV7896M Offline
          MikeV7896
          last edited by

          Or the device just doesn't support full duplex (in the case of a hub, for example). Switches are full duplex, though, so if you have a hub between your ISP modem and your pfSense box, replace it.

          The S in IOT stands for Security

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          • dotdashD Offline
            dotdash
            last edited by

            If you are using the APU based unit, that is likely your problem. The realtek nics won't auto-negotiate with some hardware and get stuck in half-duplex. I've seen it mostly with cheap media converters on Fiber installs. Our solution was to swap the hardware to something with Intel nics.

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            • M Offline
              markn62
              last edited by

              Have you tried setting interface to "default" rather than "auto-detect"?  I've seen strange behavior when set to auto-detect with some adapters.

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