ddns-hostname and ipv6

[Rick Dicaire]

Hi folks, new to the list...
I'm trying to achieve the same thing as the following for dhcpv6:

ddns-hostname = pick (option fqdn.hostname, option host-name, concat
("dhcp-", binary-to-ascii (10, 8, "-", leased-address)));
option host-name = config-option server.ddns-hostname;

My main concern isn't to set dhcp-* but to prepend the hostname sent
by the dhcp client to ddns-domainname.

How can I achieve this?

Thanks