Ipv6 address problem

  • my isp (otenet.gr) offers dual stack and i read that on some router modem (hawei,zte) it works with slaac and i fritz! it uses dhcp6.
    When i try dhcp6, my wan interface shows as a ipv6 address fe80::xxx%re1 with mac address of the ethernet that connects to my adsl modem.
    when i try slaac, my wan interface shows no ipv6 address.

    My Diagnostics: Routing tables for my ipv6 is

    Destination                       Gateway                       Flags      Netif Expire
    default                           fe80::90:1a00:142:8493%pppoe0 UGS      pppoe0
    ::1                               ::1                           UH          lo0
    2a02:580:31b::/64                 link#7                        U        pppoe0
    2a02:580:31b:0(mac lan eth)  link#7                        UHS         lo0
    fe80::%re0/64                     link#1                        U           re0
    fe80::1%re0                       link#1                        UHS         lo0
    fe80::(mac lan eth)%re0       link#1                        UHS         lo0
    fe80::%re1/64                     link#2                        U           re1
    fe80::(mac modem eth)%re1      link#2                        UHS         lo0
    fe80::%lo0/64                     link#3                        U           lo0
    fe80::1%lo0                       link#3                        UHS         lo0
    fe80::%pppoe0/64                  link#7                        U        pppoe0
    fe80::(mac lan eth)%pppoe0    link#7                        UHS         lo0
    ff01::%re0/32                     fe80::(mac lan eth)%re0   U           re0
    ff01::%re1/32                     fe80::(mac modem eth)%re1  U           re1
    ff01::%lo0/32                     ::1                           U           lo0
    ff01::%pppoe0/32                  fe80::(mac lan eth)%pppoe0 U        pppoe0
    ff02::%re0/32                     fe80::(mac lan eth)%re0   U           re0
    ff02::%re1/32                     fe80::(mac modem eth)%re1  U           re1
    ff02::%lo0/32                     ::1                           U           lo0
    ff02::%pppoe0/32                  fe80::(mac lan eth)%pppoe0 U        pppoe0

    from system logs - general

    dhcp6c[43832]: dhcp6_get_addr: duplicated DNS address (2a02:580:200::100)
    dhcp6c[43832]: dhcp6_get_addr: duplicated DNS address (2a02:580:200::200)
    dhcp6c[43832]: dhcp6_get_options: unknown or unexpected DHCP6 option opt_20, len 0
    dhcp6c[43832]: client6_recvadvert: XID mismatch
    (it gets repeated every 20 seconds)

    from system logs - ppp

    ppp: [wan] IPV6CP: Open event
    ppp: [wan] IPV6CP: state change Initial --> Starting
    ppp: [wan] IPV6CP: LayerStart
    ppp: [wan] IPV6CP: Up event
    ppp: [wan] IPV6CP: state change Starting --> Req-Sent
    ppp: [wan] IPV6CP: SendConfigReq #1
    ppp: [wan] IPV6CP: rec'd Configure Ack #1 (Req-Sent)
    ppp: [wan] IPV6CP: state change Req-Sent --> Ack-Rcvd
    ppp: [wan] IPV6CP: rec'd Configure Request #229 (Ack-Rcvd)
    ppp: [wan] IPV6CP: SendConfigAck #229
    ppp: [wan] IPV6CP: state change Ack-Rcvd --> Opened
    ppp: [wan] IPV6CP: LayerUp

    ifconfig pppoe0

    pppoe0: flags=88d1 <up,pointopoint,running,noarp,simplex,multicast>metric 0 mtu 1492
            inet6 fe80::xxxx:xxxx:xxxx:xxxx(lan mac)%pppoe0 prefixlen 64 scopeid 0x7
            inet x.x.x.x --> x.x.x.x netmask 0xffffffff
            inet6 2a02:580:31b:0:xxxx:xxxx:xxxx:xxxx(lan mac) prefixlen 64 autoconf
            nd6 options=3 <performnud,accept_rtadv>[/code
    [b]shouldnt my wan address be 2a02:580:31b:0(mac lan eth)?
    any hints on what i change to make it work properly?</performnud,accept_rtadv></up,pointopoint,running,noarp,simplex,multicast>

  • Banned

    fe80:: is link-local. Not sure what you read but your ISP does not seem to deliver any IPv6 whatsoever no matter what.

  • hmm wierd, because from shell i can ping and traceroute ipv6 addresses.
    My pppoe0 has an ipv6 address starting with 2a02:580:31b: but pfsense instead reads the local-link one.
    My routing table contains the ipv6 prefix but it seems to be ignored.

    i do have ipv6 connectivity from shell but cant manage thru pfsense or doesnt get recognized properly.

  • Ok i guess ill give more info to see troubleshoot the problem. My setup is re0 is my local lan ethernet and re1 is my connection to my adsl modem.
    I use PPPoE  on my wan(re1) interface. From what i managed to check so far is that instead of checking pppoe0 interface for my ipv6 address it checks re1.
    Maybe i understood wrong when i was selecting re1 as my wan interface? Should i have checked pppoe0? But its not created till i logging thru pppoe so it cant be.
    Maybe my set up is not supported for ipv6? And my re1 should have access to ipv6? i.e. I turn my modem back again to a router, it gets an ipv6 address and re1 gets an ipv6 address and everything works?

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