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    [Solved] Comcast Residential ipv6 doesnt work

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    • T
      trumee
      last edited by

      Hello,

      I get the following ip addresses:
      WAN- v6/DHCP6 2001:xx/128
      LAN- v6/t6 2601:xx/64

      Under LAN Interface settings, i have

      Track IPV6 Interface - WAN
      IPv6 Prefix ID - 0

      If i try to ping using Diagnostics>Ping using LAN interface it works,

      
      PING6(56=40+8+8 bytes) 2601:xx --> 2404:6800:4008:800::200e
      16 bytes from 2404:6800:4008:800::200e, icmp_seq=0 hlim=48 time=176.112 ms
      16 bytes from 2404:6800:4008:800::200e, icmp_seq=1 hlim=48 time=171.596 ms
      16 bytes from 2404:6800:4008:800::200e, icmp_seq=2 hlim=48 time=172.005 ms
      
      --- ipv6.l.google.com ping6 statistics ---
      3 packets transmitted, 3 packets received, 0.0% packet loss
      round-trip min/avg/max/std-dev = 171.596/173.238/176.112/2.039 ms
      
      

      However, on a LAN side client my ipv6 address is,
      inet6 fe80::xx  prefixlen 64  scopeid 0x20
      which doesnt match the 2601: entry.

      Also ping fails,

      
      ping6 ipv6.google.com
      connect: Network is unreachable
      
      

      Any idea how to fix this?

      Here are some screenshots of WAN and LAN settings.

      Thanks
      Screenshot_20171228_213051.png
      Screenshot_20171228_213051.png_thumb
      Screenshot_20171228_213112.png
      Screenshot_20171228_213112.png_thumb
      Screenshot_20171228_213139.png
      Screenshot_20171228_213139.png_thumb
      Screenshot_20171228_213007.png
      Screenshot_20171228_213007.png_thumb

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      • T
        trumee
        last edited by

        I reinstalled pfSense and setup a basic LAN and WAN. Lo behold, my Lan client picked up an ip address.

        I created a few VLANS, setup a LAGG interface and introduced a Ubiquiti Edge switch in between router and the LAN client. I no longer get the ipv6 address.

        So, I guess there is something with either the VLAN or the switch which hoses my ipv6.
        –--------------------------------------------------------
        Solved!

        Disabled IGMP Snooping on the switch and IPv6 is working fine. This seems to be known problem.

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        • MikeV7896M
          MikeV7896
          last edited by

          In your WAN settings, you want to request a different prefix size. With residential service, you can request as low as /60, which will give you 16 /64's to use on various networks.

          You will want to delete your DUID after changing the setting (you'll need to shell to the router and rm /var/db/dhcp6c_duid) then release/renew the WAN connection so it creates a new DUID and requests a new lease and prefix from Comcast's DHCPv6 server. Then you should be able to set up multiple networks using Track Interface and select a different prefix ID for each network.

          The S in IOT stands for Security

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