Hey,
maybe someone else has a similar problem.
ISP(dynamic v6 Prefix) <=> ASA <=> Router
now: ASA as DHCPv6-Client , router uses "ipv6 general-prefix"
future: ASA as PD-client and DHCPv6 service with delegation for the router
ASA(config)#ipv6 dhcp pool ISP
ASA(config-dhcpv6)#prefix-delegation pool global // missing on the ASA
Any ideas? Thanks!