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Comcast native ipv6 for network devices.

IPv6
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  • J
    johnpoz LAYER 8 Global Moderator
    last edited by Jun 20, 2012, 6:38 PM

    I also posted all my info in the comcast direct forum on that site.

    Well post back what I hear, but yeah it seems like just no RAs.  If comcast comes back and says it should be working, I have remote access setup for databeestje already and have PM'd him the info.

    I did notice your nick on that forum as well.

    An intelligent man is sometimes forced to be drunk to spend time with his fools
    If you get confused: Listen to the Music Play
    Please don't Chat/PM me for help, unless mod related
    SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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    • J
      johnpoz LAYER 8 Global Moderator
      last edited by Jun 20, 2012, 6:58 PM

      Ok databeestje got into my box, and he mentioned that my VM is not set to promiscuous on the switch the pfsense wan interface is connected to. Would block NDS.

      So I changed that

      But still not working, ran this command

      rtsol -DF em1
      checking if em1 is ready…
      em1 is ready
      set timer for em1 to 0:624884
      New timer is 0:00624811
      New timer is 0:00004311
      timer expiration on em1, state = 1
      send RS on em1, whose state is 2
      set timer for em1 to 4:0
      New timer is 4:00002585
      timer expiration on em1, state = 2
      send RS on em1, whose state is 2
      set timer for em1 to 4:0
      New timer is 4:00000173
      received RA from fe80::250:56ff:fe00:2 on an unexpected IF(em0)
      New timer is 0:00779783
      timer expiration on em1, state = 2
      send RS on em1, whose state is 2
      set timer for em1 to 1:0
      New timer is 1:00000259
      timer expiration on em1, state = 2
      No answer after sending 3 RSs
      stop timer for em1
      there is no timer

      So unless have to restart the esxi box?  To allow the switch setting to take effect, seems like no RAs

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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      • J
        johnpoz LAYER 8 Global Moderator
        last edited by Jun 20, 2012, 8:18 PM

        so I heard back from netdog

        8m : 2012-06-20 15:33:59 : From NetDog See Profile delete · mark-unread · keep
        The CMTS your on supports IPv6 and I can see leases going out to other customers on the DHCP server.

        but I responded back to him that not seeing any RAs and no default route.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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        • J
          johnpoz LAYER 8 Global Moderator
          last edited by Jun 20, 2012, 8:41 PM

          so I did a gitsync since I saw that wrong RA commit, and then hit save on my wan and its working from the router now.

          Internet6:
          Destination                      Gateway                      Flags      Netif Expire
          default                          fe80::201:5cff:fe31:da01%em1  UGS        em1
          ::1                              ::1                          UH          lo0
          2001:558:6033:12c:585b:3619:66ef:e1b1 link#2                        UHS        lo0
          2601:d:8b80:2c::/64              link#1                        U          em0
          2601:d:8b80:2c::1                link#1                        UHS        lo0
          2601:d:8b80:2c:250:56ff:fe00:2    link#1                        UHS        lo0
          fe80::%em0/64                    link#1                        U          em0
          fe80::1:1%em0                    link#1                        UHS        lo0
          fe80::250:56ff:fe00:2%em0        link#1                        UHS        lo0
          fe80::%em1/64                    link#2                        U          em1
          fe80::250:56ff:fe00:1%em1        link#2                        UHS        lo0
          fe80::%lo0/64                    link#6                        U          lo0
          fe80::1%lo0                      link#6                        UHS        lo0
          fe80::%ovpns1/64                  link#10                      U        ovpns1
          fe80::250:56ff:fe00:2%ovpns1      link#10                      UHS        lo0
          ff01::%em0/32                    fe80::250:56ff:fe00:2%em0    U          em0
          ff01::%em1/32                    fe80::250:56ff:fe00:1%em1    U          em1
          ff01::%lo0/32                    ::1                          U          lo0
          ff01::%ovpns1/32                  fe80::250:56ff:fe00:2%ovpns1  U        ovpns1
          ff02::%em0/32                    fe80::250:56ff:fe00:2%em0    U          em0
          ff02::%em1/32                    fe80::250:56ff:fe00:1%em1    U          em1
          ff02::%lo0/32                    ::1                          U          lo0
          ff02::%ovpns1/32                  fe80::250:56ff:fe00:2%ovpns1  U        ovpns1
          [2.1-BETA0][admin@pfsense.local.lan]/root(10): ping6 ipv6.google.com
          PING6(56=40+8+8 bytes) 2001:558:6033:12c:585b:3619:66ef:e1b1 –> 2607:f8b0:400f:801::1013
          16 bytes from 2607:f8b0:400f:801::1013, icmp_seq=0 hlim=55 time=36.524 ms
          16 bytes from 2607:f8b0:400f:801::1013, icmp_seq=1 hlim=55 time=36.316 ms
          16 bytes from 2607:f8b0:400f:801::1013, icmp_seq=2 hlim=55 time=36.014 ms
          16 bytes from 2607:f8b0:400f:801::1013, icmp_seq=3 hlim=55 time=35.045 ms
          16 bytes from 2607:f8b0:400f:801::1013, icmp_seq=4 hlim=55 time=35.084 ms
          ^C
          --- ipv6.l.google.com ping6 statistics ---
          5 packets transmitted, 5 packets received, 0.0% packet loss
          round-trip min/avg/max/std-dev = 35.045/35.797/36.524/0.619 ms

          [2.1-BETA0][admin@pfsense.local.lan]/root(11): traceroute6 ipv6.google.com
          traceroute6 to ipv6.l.google.com (2607:f8b0:400f:801::1013) from 2001:558:6033:12c:585b:3619:66ef:e1b1, 64 hops max, 12 byte packets
          1  * * *
          2  te-1-2-ur07.mtprospect.il.chicago.comcast.net  13.203 ms  10.957 ms  9.458 ms
          3  te-1-2-0-5-ar01.elmhurst.il.chicago.comcast.net  13.770 ms  22.087 ms  26.169 ms
          4  pos-0-7-0-0-cr01.chicago.il.ibone.comcast.net  18.085 ms  18.121 ms  15.739 ms
          5  pos-1-8-0-0-cr01.350ecermak.il.ibone.comcast.net  17.688 ms  17.588 ms  15.752 ms
          6  pos-1-4-0-0-pe01.350ecermak.il.ibone.comcast.net  14.264 ms  13.737 ms  13.539 ms
          7  2001:559::382  14.099 ms  13.056 ms  12.680 ms
          8  2001:4860::1:0:3f7  12.781 ms
              2001:4860::1:0:92e  22.108 ms
              2001:4860::1:0:3f7  13.786 ms
          9  2001:4860::8:0:2fe9  13.781 ms  16.365 ms  13.853 ms
          10  2001:4860::8:0:281d  50.876 ms
              2001:4860::8:0:281e  36.705 ms
              2001:4860::8:0:281d  35.046 ms
          11  2001:4860::8:0:3426  35.580 ms  37.061 ms  36.148 ms
          12  2001:4860::1:0:7a4  36.630 ms  36.996 ms  36.876 ms
          13  2001:4860:0:1::593  38.282 ms  45.503 ms  35.759 ms
          14  2607:f8b0:8000:1d::f  37.068 ms  37.603 ms  35.807 ms
          [2.1-BETA0][admin@pfsense.local.lan]/root(12):

          Have to see if can get a client going now.  But seems gateway widget is not working

          WAN_DHCP6 Pending Pending Unknown

          or

          WAN_DHCP6 ~ ~ ~ Unknown

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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          • J
            johnpoz LAYER 8 Global Moderator
            last edited by Jun 20, 2012, 8:53 PM

            spoke too soon.  Just did a reboot of pfsense, and now no route and

            ping6 ipv6.google.com
            ping6: UDP connect: No route to host

            So is this something wrong with pfsense, or comcast just not sending RA's – I have to guess no RA's since shouldn't I see them with a simple tcpdump?

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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            • W
              whfsdude
              last edited by Jun 20, 2012, 11:14 PM

              tcpdump again.

              you could technically avoid RA issues at this point by setting the default gw to default  fe80::201:5cff:fe31:da01%em1  UGS        em1

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              • J
                johnpoz LAYER 8 Global Moderator
                last edited by Jun 21, 2012, 12:58 AM Jun 21, 2012, 12:49 AM

                That sure and the hell does not seem like a fix to me..  When it was working from pfsense, my clients were not working for starters.

                A better fix would be to just go back to my tunnel ;)

                And is it really common practice for my gateway to be linklocal?  Then why give my interface a global address??  Shouldn't I have a global gateway address to match up with my /128?

                I just do not get why they can not just freaking hand out the gateway via dhcp??

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                • W
                  whfsdude
                  last edited by Jun 21, 2012, 1:32 AM Jun 21, 2012, 1:28 AM

                  @johnpoz:

                  That sure and the hell does not seem like a fix to me..  When it was working from pfsense, my clients were not working for starters.

                  How is it not a valid fix? Did you add the correct firewalls to pass v6 traffic?

                  A better fix would be to just go back to my tunnel ;)

                  Have you tried just installing a new build without any previous tunnel configuration?

                  And is it really common practice for my gateway to be linklocal?  Then why give my interface a global address??  Shouldn't I have a global gateway address to match up with my /128?

                  Yes.

                  I just do not get why they can not just freaking hand out the gateway via dhcp??

                  It's not. Worked out the box for me. You do realize that DHCPv6 doesn't have an option to hand out a gateway. …that's why RA is used.

                  Edit: Maybe the best solution is plug a laptop directly into the modem and run tcpdump. You'll be able to verify RAs.

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                  • J
                    johnpoz LAYER 8 Global Moderator
                    last edited by Jun 21, 2012, 5:25 AM

                    I am aware that dhcpv6 does not hand out gateway!  Just ranting here - don't understand why it was removed, why not leave it as an option?

                    Its not a fix, because setting a static gateway like that – that might change is not a good idea!  If it was my network and knew it wasn't going to change then sure.  But I have no idea what comcast might do next week.

                    Plugging a box directly into my modem is a great idea, because what I can tell you is not seeing any RA's for sure currently.

                    An intelligent man is sometimes forced to be drunk to spend time with his fools
                    If you get confused: Listen to the Music Play
                    Please don't Chat/PM me for help, unless mod related
                    SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                    • J
                      johnpoz LAYER 8 Global Moderator
                      last edited by Jun 21, 2012, 7:02 AM

                      Ok I plugged 2 different boxes into my modem, and yes rebooted modem between changing them.  Got online with ipv4 no issues.

                      But linux didn't even get an IP via dhcpv6, and with tcpdump did not see any RAs - using radvdump nothing.  Connected a win 7 box, got an ip - and even pointed at ipv6 dns, but couldn't talk to them ;)

                      Seems native ipv6 here in schaumburg is not yet ready for prime time!  Back to my nice stable HE tunnel I guess

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                      • W
                        whfsdude
                        last edited by Jun 21, 2012, 9:21 AM

                        Sounds like you've confirmed it is a 100% a Comcast issue having to do with a partial deployment. You should reach back out to NetDog and let him know you can get DHCPv6 but don't see any RA at all.

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                        • J
                          johnpoz LAYER 8 Global Moderator
                          last edited by Jun 21, 2012, 3:27 PM

                          yup have a couple of PMs out to him, and have a post in the direct comcast forum on dslreports.

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                          • D
                            databeestje
                            last edited by Jun 21, 2012, 7:28 PM

                            I think the headend is not sending out RA, but the dhcp6 server/relay at the headend is already active.

                            But without RA that means delivering broken IPv6. Sort off, the missing default route means it fails fast, but still.

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                            • J
                              jbrzozowski
                              last edited by Jun 23, 2012, 3:05 PM Jun 22, 2012, 2:12 AM

                              @johnpoz:

                              Yeah more than willing to give access to take a look..  Just PM me when would be good time for you to access, and I can send you the info to remote in.

                              I have got a comcast guy on another forum checking for sure if should be available in my area.

                              I run the IPv6 program for Comcast, I will try to help.

                              @johnpoz:

                              As to screen shots and what em – they might of swapped because I was using 2 different vms in testing this.  I had a clean vm that wasn't working and then was playing with it again on my normal vm.  So those 2 vms might be swapped for which em is wan and which is lan, etc.  Would have to double check that.

                              edit:
                              So if you see in the screenshots I posted I was getting Ips -- but just couldn't get anywhere, I didn't see a default route for ipv6.  But looking forward to your PM on your schedule - I should be available tonight, few hours from now to switch it over to my clean install with no tunnel setup -- can let you in for sure to take a look.  Would really really appreciate that!

                              If you have time now I could remotely turn on remote access and let you in to current setup with HE tunnel setup, etc.  And you could play with that.  Don't care too much if you break the tunnel setup.  Doesn't matter if loose the tunnel that is currently setup, would like to go native anyway ;)

                              edit2:  Got your PM, thanks once I hear back from the comcast guy that its suppose to be there I will let you know.  But what I am thinking is it's not there yet?

                              So this is my normal vm, I turned off the HE tunnel.  Updated to the latest and greatest snap

                              2.1-BETA0 (i386)
                              built on Tue Jun 19 20:53:56 EDT 2012
                              FreeBSD 8.3-RELEASE-p3

                              I then run gitsysnc this morning to be sure.  Deleted my HE tunnel stuff, set wan to dhcp6, prefix delegation 64.  Then set Lan to track and 0 for prefix ID.  Rebooted.

                              As you can see from screenshot I get a /128 and shows a /64 on my lan.. But just don't get a route out on ipv6 -- so I have highlighted that yes my wan is em1, and let a tcpdump -i em1 -vv ip6 run for like 5 minutes or so and just don't see anything!  I should be seeing RA should I not?  There should be some in a 5 minute period I would think ;)

                              by default we reply to a router requesting an IANA and IAPD with a /128 and /64.  You should see RAs more frequently than 5m.

                              @johnpoz:

                              So my guess is something is not turned on at my isp for native to work yet for me.  Once I hear back from the comcast guy on another forum that is checking with my modem mac and still nothing working I will let you know and more than happy to let you in.  Happy to let you in now if you want.

                              you can contact me offline, I can verify if IPv6 has been launched in your area.

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                              • J
                                jbrzozowski
                                last edited by Jun 23, 2012, 3:04 PM Jun 22, 2012, 2:13 AM

                                @whfsdude:

                                johnpoz,

                                Reach out in the Comcast forums on dslreports.com. It looks like they've set up DHCPv6 without RA. Just checking though, you've got a DOCSIS3 modem, right?

                                we use RAs + stateful DHCPv6.  IPv6 auto-configuration is not supported.

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                                • J
                                  jbrzozowski
                                  last edited by Jun 23, 2012, 3:04 PM Jun 22, 2012, 2:14 AM

                                  @johnpoz:

                                  Yup SB6120, and have PM out to netdog on that site, he responded already once - but seems I only game him the CMTS-MAC, when he needed the CM-MAC?  So now I have sent him everything I could see from the modem with any sort of mac in it ;)

                                  6120 is good to go, CMMAC or account # sent privately both work.

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                                  • J
                                    jbrzozowski
                                    last edited by Jun 23, 2012, 3:04 PM Jun 22, 2012, 2:16 AM

                                    @johnpoz:

                                    so I heard back from netdog

                                    8m : 2012-06-20 15:33:59 : From NetDog See Profile delete · mark-unread · keep
                                    The CMTS your on supports IPv6 and I can see leases going out to other customers on the DHCP server.

                                    but I responded back to him that not seeing any RAs and no default route.

                                    you should be learning the default route from the RAs sent by my CMTS.

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                                    • J
                                      jbrzozowski
                                      last edited by Jun 23, 2012, 3:03 PM Jun 22, 2012, 2:17 AM

                                      @johnpoz:

                                      That sure and the hell does not seem like a fix to me..  When it was working from pfsense, my clients were not working for starters.

                                      A better fix would be to just go back to my tunnel ;)

                                      And is it really common practice for my gateway to be linklocal?  Then why give my interface a global address??  Shouldn't I have a global gateway address to match up with my /128?

                                      I just do not get why they can not just freaking hand out the gateway via dhcp??

                                      this would be a step backwards no?

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                                      • J
                                        jbrzozowski
                                        last edited by Jun 23, 2012, 3:03 PM Jun 22, 2012, 2:18 AM

                                        @johnpoz:

                                        I am aware that dhcpv6 does not hand out gateway!  Just ranting here - don't understand why it was removed, why not leave it as an option?

                                        Its not a fix, because setting a static gateway like that – that might change is not a good idea!  If it was my network and knew it wasn't going to change then sure.  But I have no idea what comcast might do next week.

                                        Plugging a box directly into my modem is a great idea, because what I can tell you is not seeing any RA's for sure currently.

                                        [jjmb] I also co-chair the IETF dhcwg, there is talk about adding this option.  This is being heavily debated and even if it becomes available it does not mean people will use it.

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                                        • C
                                          cmb
                                          last edited by Jun 22, 2012, 6:13 PM

                                          Thanks for joining the forum, John. Much appreciate having your feedback and expertise shared here.

                                          For those who don't know, that's John Brzozowski. Chief Architect, IPv6 and Distinguished Engineer at Comcast. Also a chair/co-chair of some major IPv6 working groups, a true authority on the subject.

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