In RADIUS you have Framed-IPv6-Prefix for the PPP link itself and Delegated-IPv6-Prefix (defined in an I-D) for prefix delegation but PPP can't delegate a prefix, you should use DHCPv6 for this job.
Regards [EMAIL PROTECTED] PS: the DHCPv6 Relay RADIUS Attribute Option can bind RADIUS on the NAS with the DHCPv6 services when needed. -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------