IPv6 prefix delegation to Fritz!Box no answer from pfSense

  • Hi,

    pfsense 2.3.2-RELEASE-p1
    FritzOS 06.80

    I have a pfSense system running on a VDSL link with a static IPv6 configuration + a static routed 2001:1111:4444::/48.
    Now I would like to run a Fritzbox behind that pfSense while requesting a prefix through prefix delegation.

    I set up everything like I think it's right, but as it seems the FB asks for a prefix, but the pfSense just doesn't answer. What am I doing wrong. Here come the details.

    downstream interface IP: 2001:1111:4444:1c::/64
    Enable DHCPv6 server on interface VOIP
    DHCPv6 Server range from: 2001:1111:4444:1c::f
    DHCPv6 Server range to: 2001:1111:4444:1c::ffff
    DHCPv6 Server PD range from: 2001:1111:4444:f000::
    DHCPv6 Server PD range to: 2001:1111:4444:ff00::
    DHCPv6 Server PD size: 60
    Router Advertisement is set to Managed with DNS Settings set to "Use same as DHCPv6 server"

    FB (translated from German):
    use native IPv6
    global address exclusively via DHCPv6
    As a matter of fact I tried every possible setting in the FB. It doesn't change.

    Then I sniffed on pfsense at this VOIP interface with wireshark to see what happens.
    I see a DHCPv6 Solicitation originating from the FB headed to ff02::1:2.

    Please help!
    ![Screen Shot 2017-02-17 at 09.46.53.png](/public/imported_attachments/1/Screen Shot 2017-02-17 at 09.46.53.png)
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    ![Screen Shot 2017-02-17 at 09.46.53.png_thumb](/public/imported_attachments/1/Screen Shot 2017-02-17 at 09.46.53.png_thumb)

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