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    Renew DHCP IP

    Scheduled Pinned Locked Moved General pfSense Questions
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    • JKnottJ Offline
      JKnott @Thalhammer
      last edited by

      @Thalhammer

      DHCPv6 goes through a sequence similar to IPv4, with solicit, advertise, request & reply XID packets. Once an address is established, there are renew & reply packets. Are you seeing those? Also, the address shouldn't just change on it's own, without one or the other sequence receiving the address.

      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...

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      • T Offline
        Thalhammer
        last edited by

        So if I understand correctly, the isp router should update the address of my "client" pfsense automatically if it gets a new IPv6 net ?

        I could try setting up a capture between pfsense and the isp router, but I have no idea when I get a new IP and the timeframe between renewals usually is quite large (multiple weeks).

        To be clear: The issue is not that pfsense does not get an address. The issue is that there is no way on the ui to renew that address (like it is with ipv4). I am not deep enough into ipv6 (yet) to be sure if this expected behaviour, but if it is I would expect it to also refresh automatically if the subnet changes.

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        • JKnottJ Offline
          JKnott @Thalhammer
          last edited by

          @Thalhammer

          Is your modem in bridge or gateway mode? With pfsense, you want bridge mode. This way, the DHCPv6-PD will reach pfsense. Also, you will get a WAN address that has nothing to do with your prefix and might not be used in routing.

          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...

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          • stephenw10S Offline
            stephenw10 Netgate Administrator
            last edited by

            @Thalhammer said in Renew DHCP IP:

            all ports on the ISP Router are forwarded to PfSense

            Sounds more like a DMZ mode.

            Static v4 and dynamic v6 is not that common. I suspect the static v4 address is preventing the manual renew lease button appearing on Status > Interfaces.

            Steve

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            • JKnottJ Offline
              JKnott @stephenw10
              last edited by

              @stephenw10

              Are the IPv4 and IPv6 address configurations connected? When I look at the WAN configuration, I see I can set them independently. Also, what button is being mentioned here. I see a Release WAN button on the Status / Interfaces page, but nothing on the Interfaces / WAN page.

              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...

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              • stephenw10S Offline
                stephenw10 Netgate Administrator
                last edited by

                Yes, that button. There isn't a separate button for dhcpv6 so you can't renew that if v4 is set to static. I think at least!

                Steve

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                • JKnottJ Offline
                  JKnott @stephenw10
                  last edited by

                  @stephenw10

                  Well, I use DHCP for both IPv4 and IPv6. I only have the one button for IPv4. Does it trigger a release on both? Also, IPv6 is a bit more complex than IPv4, in that there's not only a WAN address, but also a prefix and I've found the prefix is pretty much permanent. With IPv4, I'll get a different address & host name, if I change either my WAN NIC or modem. I have changed both in recent months, but my prefix remains.

                  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...

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                  • stephenw10S Offline
                    stephenw10 Netgate Administrator
                    last edited by

                    Mmm, your ISP is better than some then. I get new prefixes at random and it's really annoying. 😉

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                    • JKnottJ Offline
                      JKnott @stephenw10
                      last edited by

                      @stephenw10

                      I used to have that problem too, until the Do not allow PD/Address release setting was added.

                      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...

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                      • stephenw10S Offline
                        stephenw10 Netgate Administrator
                        last edited by

                        I have that set. Hard to really say if it made a difference for me. It certainly doesn't prevent it entirely.

                        Steve

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                        • JKnottJ Offline
                          JKnott @stephenw10
                          last edited by

                          @stephenw10

                          For me, just unplugging and reconnecting the WAN cable was enough to cause the change. The last time my prefix changed was almost 2 years ago, when there was a problem with the CMTS at my ISP.

                          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...

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