If you use separate VLANs for each customer then the CPE router doesn't even require an external IPV6 address for DHCPv6-PD. IPV6 link-local addresses can be used between your BRAS and customer CPE router. Some CPEs can even allocate a WAN/mgmt IPV6 address out of the delegated subnet via DHCPv6-PD.
On Tue, Sep 8, 2015, at 01:31 PM, Owen DeLong wrote: > Short answer to that is “DHCPv6-PD” > > Once the router has an external address communicating point to point with > the ISP router, it should then send an DHCPv6-PD request asking for a > prefix that it can manage. The ISPs DHCP server should then send back a > /48 (or if you want to be silly, a /56 or a /60, and if you want to be > insane, a /64).