Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Trouble configuring IPv6

    Scheduled Pinned Locked Moved IPv6
    28 Posts 2 Posters 2.8k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • JKnottJ
      JKnott @wineguy
      last edited by

      @wineguy

      Yep, it likely is an ISP issue or beyond. If it was your issue, you should see the pings for LAN addresses hitting the WAN interface, but you're not. This is exactly what I saw when I had that problem 2 years ago.

      PfSense running on Qotom mini PC
      i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
      UniFi AC-Lite access point

      I haven't lost my mind. It's around here...somewhere...

      W 1 Reply Last reply Reply Quote 0
      • W
        wineguy @JKnott
        last edited by

        @jknott
        Here's the capture of 546|547 on the WAN interface...

        packetcapture-dhcp6.zip

        JKnottJ 1 Reply Last reply Reply Quote 0
        • JKnottJ
          JKnott @wineguy
          last edited by

          @wineguy

          There should be more to it than that. There should be at least 4 packets.

          Here's one that works:

          DHCPv6 Solicit and Renew.pcapng

          Did you follow the instructions to shut down pfsense, disconnect the modem, restart pfsense and reconnect the modem? That should provide the full DHCPv6-PD sequence.

          PfSense running on Qotom mini PC
          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
          UniFi AC-Lite access point

          I haven't lost my mind. It's around here...somewhere...

          W 1 Reply Last reply Reply Quote 0
          • W
            wineguy @JKnott
            last edited by

            @jknott
            I followed the instructions precisely. The first time I got two packets.

            I tried again - the second time I reset the ISP modem also. Waited for both to finish booting, started the packet capture, and then reconnected the WAN to the ISP modem.

            What I sent was the result of the second try (which, to my untrained eyes, seemed much like the first attempt).

            JKnottJ 1 Reply Last reply Reply Quote 0
            • JKnottJ
              JKnott @wineguy
              last edited by

              @wineguy

              I don't see any response from your ISP. If that's all you get, then that could be the problem. Take a look at mine. You need at least 4 packets, ending with the reply. In yours, I don't see the advertise or reply. Is IPv6 up on pfsense? I'd be surprised if it is.

              PfSense running on Qotom mini PC
              i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
              UniFi AC-Lite access point

              I haven't lost my mind. It's around here...somewhere...

              W 2 Replies Last reply Reply Quote 0
              • W
                wineguy @JKnott
                last edited by

                @jknott
                Hmmmm.... It is NOW, but that doesn't mean that it was THEN...

                Let me run the test again and WAIT until I see an IPv6 address has been assigned to the WAN before I stop the packet capture.

                1 Reply Last reply Reply Quote 0
                • W
                  wineguy @JKnott
                  last edited by

                  @jknott
                  Here's where I am now. I tried a few times to get the capture and got zero->2 packets. The zero was the most frustrating, because I saw that the WAN interface acquired the address, but I captured NO packets.

                  I concluded that I needed to install a sniffer between the WAN interface and the ISP modem, but that involves moving a cable that will break something - my next window will be Tuesday morning.

                  In the interim though, I was toying with a few environment modifications and changed my RA from 'unmanaged' to 'stateless DHCP' and my IPv6 started working.

                  I don't believe it's actually fixed, but it's not easy to debug something that isn't obviously broken. If history is a guide, it'll break again within a few days and I'll make my physical changes on Tuesday and have captures that show the full sequence.

                  Until then...

                  Thank you, again, for your assistance!

                  JKnottJ 1 Reply Last reply Reply Quote 0
                  • JKnottJ
                    JKnott @wineguy
                    last edited by

                    @wineguy

                    Yeah, using a sniffer is a good idea. When I had the problem with my ISP, I made a data tap with a managed switch.

                    PfSense running on Qotom mini PC
                    i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                    UniFi AC-Lite access point

                    I haven't lost my mind. It's around here...somewhere...

                    1 Reply Last reply Reply Quote 0
                    • First post
                      Last post
                    Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.