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    IPV6 stops working after restarting/unplugging modem.

    Scheduled Pinned Locked Moved IPv6
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    • J
      JacktheSmack
      last edited by

      If I have to restart the modem, or unplug it, when I plug it back in IPV6 no longer works. I have to disable then re-enable the WAN-IPV6 gateway to get IPV6 working again.

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      • stan-qazS
        stan-qaz
        last edited by

        Do you have pfSense set to ignore the modem's default internal address? I use this for my SB-6183 on Cox Cable.

        pfSense page: http://172.16.0.1/interfaces.php?if=wan

        Section: DHCP Client Configuration

        Reject leases from

        192.168.100.1

        To make the DHCP client reject leases from an undesirable DHCP server, place the IP address of the DHCP server here. This is useful for rejecting leases from cable modems that offer private IP addresses when they lose upstream sync.

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        • ?
          Guest
          last edited by

          @JacktheSmack:

          If I have to restart the modem, or unplug it, when I plug it back in IPV6 no longer works. I have to disable then re-enable the WAN-IPV6 gateway to get IPV6 working again.

          I assume you are using dhcp on ipv6?

          I have just done a test, this is with the latest 2.4B snapshot. On pulling the WAN cable dhcp6c exits, and relaunches an WAN cable re-connect.

          Can you provide more info, i.e. your DHCP6 settings?

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          • MikeV7896M
            MikeV7896
            last edited by

            @stan-qaz:

            Do you have pfSense set to ignore the modem's default internal address? I use this for my SB-6183 on Cox Cable.
            …
            To make the DHCP client reject leases from an undesirable DHCP server, place the IP address of the DHCP server here. This is useful for rejecting leases from cable modems that offer private IP addresses when they lose upstream sync.

            Just a note that if you do this, you won't be able to check your modem's status page if it loses sync with your ISP for whatever reason. So if your modem is rebooting and you want to check the signal levels, event log, or something else, you won't be able to since pfSense is ignoring the modem's DHCP server.

            The S in IOT stands for Security

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