IPv6 with PPPoE on Ubuntu

/etc/sysctl.conf

net.ipv6.conf.all.forwarding=1
net.ipv6.conf.ppp0.accept_ra=2

/etc/ppp/peers/dsl-provider (or anything like this)

ipv6 ,

/etc/ppp/ipv6-up.d/radvd (or anything you like)

/etc/init.d/wide-dhcpv6-client restart
/etc/init.d/radvd restart

/etc/wide-dhcpv6/dhcp6c.conf

interface ppp0 {
    send ia-pd 0;
};

id-assoc pd 0 {
    prefix-interface eth0 {
        sla-len 0;
        sla-id 1;
    };
};

/etc/radvd.conf

interface eth0
{
    AdvSendAdvert on;
    prefix ::/64
    {
        AdvOnLink on;
        AdvAutonomous on;
        AdvRouterAddr on;
    };
};