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    ipv6 broken: radvd: can't join ipv6-allrouters on <interface>

    2.5 Development Snapshots (Retired)
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    • I
      Irata @strangegopher
      last edited by Irata

      I can confirm this must be an issue.

      I have exactly the same situation, after around 6-7 hours of running, radvd spams the logs with "can't join ipv6-allrouters". IPv6 stops works as all clients release their IPv6 address since no more router advertisements are ever sent.
      As an interim fix, I stop and start radvd via cron every 6 hours, a click of restart does not fix it. It has to be a stop, sleep 1 second, and a start. Is there some memory leak in radvd? Or binding and not releasing to the interface? There is radvd 2.18 available now with numerous fixes.

      This issue does unfortunately break IPv6 when using un-managed router advertisements.

      I have turned up logging levels, but it does not add anything more related to radvd.

      S 1 Reply Last reply Reply Quote 0
      • S
        strangegopher @Irata
        last edited by

        @Irata thank you, good to know that I am not the only one.
        Can someone from pfsense team let us know if a bug report needs to be opened?

        I 1 Reply Last reply Reply Quote 0
        • I
          Irata @strangegopher
          last edited by

          @strangegopher thanks, glad I found your post as I also thought it was just me!

          It happens on all interfaces at the same time, so I took a packet capture on a quiet subnet - but nothing of interest again, can just see when the router advertisements stop.

          Sadly my restart workaround using cron has side effects, any active IPv6 connections are dropped each time it runs. And one Android device even disconnects from WiFi each time radvd is restarted, it treats a loss of IPv6 as a network problem, bizarre but true.

          Be interested to hear if anyone using radvd and IPv6 does not have this issue? Check Routing logs in System Logs.

          I'm at a loss what else to do. It's interesting that a periodic restart masks the problem, does that point to radvd being the problem?

          1 Reply Last reply Reply Quote 0
          • M
            maverick_slo
            last edited by stephenw10

            I don't have this issue.
            I'm on 2.5 with uptime 3 days.

            S 1 Reply Last reply Reply Quote 0
            • S
              strangegopher @maverick_slo
              last edited by

              @maverick_slo do u have ipv6?

              1 Reply Last reply Reply Quote 0
              • M
                maverick_slo
                last edited by

                Since 2013 😁

                1 Reply Last reply Reply Quote 0
                • arafeyA
                  arafey
                  last edited by

                  I've been having this problem as well and I also noticed that it's about 6 hours before IPv6 suddenly breaks. This should definitely be fixed before 2.5.0 is released.

                  1 Reply Last reply Reply Quote 0
                  • C
                    crimper
                    last edited by

                    I am having the same issue. IPv6 would stop working within 24 hours. I backup the config.xml from the 2.5 and restored the file to a 2.4.4_p2 and it does not have the problem.

                    1 Reply Last reply Reply Quote 0
                    • I
                      Irata
                      last edited by

                      I'm not sure how to find what's common.

                      I'm running pfsense within VMware ESXi and have this issue. Are others with this issue the same?

                      I can also confirm the latest 2.4 branch does not have this issue with the same config.

                      1 Reply Last reply Reply Quote 0
                      • S
                        strangegopher
                        last edited by

                        I am running it on baremetal dell box but I am using chelsio 10G sfp+ nic.

                        1 Reply Last reply Reply Quote 0
                        • S
                          strangegopher
                          last edited by

                          @jimp sorry for the ping but do u have any idea why ipv6 stops working?

                          1 Reply Last reply Reply Quote 0
                          • M
                            motific
                            last edited by

                            How is it on a fresh 2.5 install with the old config?

                            I’ve just had some bad behaviour with radvd not responding at all (not quite the same as your issue) and that has cleared it.

                            I 1 Reply Last reply Reply Quote 0
                            • kiokomanK
                              kiokoman LAYER 8
                              last edited by

                              i have similar behavior on my log

                              Jun 6 21:32:29 	radvd 	66014 	resuming normal operation
Jun 6 21:32:29 	radvd 	66014 	attempting to reread config file
Jun 6 18:57:34 	radvd 	66014 	resuming normal operation
Jun 6 18:57:34 	radvd 	66014 	attempting to reread config file
Jun 6 14:01:49 	radvd 	65728 	version 2.17 started 
Jun 6 14:00:39 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 14:00:39 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0
Jun 6 14:00:33 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 14:00:22 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 14:00:20 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0
Jun 6 14:00:08 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 14:00:01 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0
Jun 6 13:59:53 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0
Jun 6 13:59:53 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 13:59:40 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0
Jun 6 13:59:36 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 13:59:30 	radvd 	67952 	can't join ipv6-allrouters on igb2
Jun 6 13:59:25 	radvd 	67952 	can't join ipv6-allrouters on ath0_wlan0

                              igb0 is wan
                              igb1 is lan
                              on igb2 i have only 1 pc, a server connected with static ipv6
                              on ath0_wlan0 i have a couple of notebook with windows 10 and a couple of android phone

                              ̿' ̿'\̵͇̿̿\з=(◕_◕)=ε/̵͇̿̿/'̿'̿ ̿
                              Please do not use chat/PM to ask for help
                              we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
                              Don't forget to Upvote with the 👍 button for any post you find to be helpful.

                              1 Reply Last reply Reply Quote 0
                              • I
                                Irata @motific
                                last edited by

                                A fresh install causes the same error for me, once stateless IPv6 is setup. I can't find a stable working system whatever I do, other than back to 2.4.

                                Because I'm using an ESXi testbed, it's easy to spin up new installs.

                                I do think there is something fundamental here, given the reports from wide ranging setups.

                                1 Reply Last reply Reply Quote 0
                                • kiokomanK
                                  kiokoman LAYER 8
                                  last edited by kiokoman

                                  the error is generated from device-bsd44.c, a patch it's inside the port of radvd for freebsd
                                  tracking back there was similar problem. related Bug #2878 https://redmine.pfsense.org/issues/2878 from 2013

                                  /* XXX: See pfSense ticket #2878 */
+	setsockopt(sock, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq, sizeof(mreq));
+
+	if (setsockopt(sock, IPPROTO_IPV6, IPV6_JOIN_GROUP,
+			&mreq, sizeof(mreq)) < 0) {
+		flog(LOG_ERR, "can't join ipv6-allrouters on %s", iface->props.name);
+		return (-1);
+ }

                                  maybe it's time for a new ticket
                                  https://redmine.pfsense.org/issues/9577

                                  ̿' ̿'\̵͇̿̿\з=(◕_◕)=ε/̵͇̿̿/'̿'̿ ̿
                                  Please do not use chat/PM to ask for help
                                  we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
                                  Don't forget to Upvote with the 👍 button for any post you find to be helpful.

                                  1 Reply Last reply Reply Quote 0
                                  • S
                                    strangegopher
                                    last edited by

                                    idk if we open a ticket devs might just ignore it, first we should get devs on the forums to tell us if we need to open a bug.

                                    M 1 Reply Last reply Reply Quote 1
                                    • M
                                      motific @strangegopher
                                      last edited by

                                      @strangegopher - they're aware of it, one of the devs referred to the ticket in a thread with an issue I'm having.

                                      1 Reply Last reply Reply Quote 0
                                      • M
                                        maverick_slo
                                        last edited by

                                        Now it hit me too:

                                        Jun 29 07:17:29 radvd 62926 can't join ipv6-allrouters on hn0.10
                                        Jun 29 07:15:22 radvd 62926 can't join ipv6-allrouters on hn0.10
                                        Jun 29 07:15:00 radvd 62926 can't join ipv6-allrouters on hn0.9
                                        Jun 29 07:13:07 radvd 62926 can't join ipv6-allrouters on hn0.7
                                        Jun 29 07:12:47 radvd 62926 can't join ipv6-allrouters on hn0.10
                                        Jun 29 07:11:25 radvd 62926 can't join ipv6-allrouters on hn0.8
                                        Jun 29 07:11:23 radvd 62926 can't join ipv6-allrouters on hn0.9
                                        Jun 29 07:10:22 radvd 62926 can't join ipv6-allrouters on hn0.10
                                        Jun 29 07:08:10 radvd 62926 can't join ipv6-allrouters on hn0.10

                                        I 1 Reply Last reply Reply Quote 0
                                        • kiokomanK
                                          kiokoman LAYER 8
                                          last edited by

                                          welcome to the party !

                                          ̿' ̿'\̵͇̿̿\з=(◕_◕)=ε/̵͇̿̿/'̿'̿ ̿
                                          Please do not use chat/PM to ask for help
                                          we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
                                          Don't forget to Upvote with the 👍 button for any post you find to be helpful.

                                          1 Reply Last reply Reply Quote 0
                                          • I
                                            Irata @maverick_slo
                                            last edited by

                                            @maverick_slo made any changes recently, or added any new IPv6 devices?

                                            1 Reply Last reply Reply Quote 0
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