@admin0 Just finished a basic configuration of my mikrotik (routeros 4.49.1) to connect to ziggo ipv6 through a Ubee modem.
At first I was using al sorts of complex scripts from the internet. I got a prefix almost immediately but the rest was difficult.
Now I use the following script to connect all my lan-ports (one network, so I use Bridge) to ether1-WAN (connected to Ubee). Devices in the network get their ipv6 address automatically through SLAAC.
/ipv6 dhcp-client
add add-default-route=yes interface=ether1-WAN pool-name=ziggo-ipv6 \
prefix-hint=::/56 pool-prefix-length=64 request=prefix
/ipv6 nd
set [ find default=yes ] advertise-dns=no advertise-mac-address=no \
hop-limit=64 interface=bridge
/ipv6 address
add address=::1 eui-64=yes advertise=yes from-pool=ziggo-ipv6 \
interface=bridge
That is all. For now I rely on the default firewall settings of the mikrotik.
Good luck!
Chris