3.1.b Identify, implement and troubleshoot IPv6 addressing and subnetting

3.1.b [ix] DHCPv6 prefix delegation

DHCPv6 Prefix Delegation (DHCPv6-PD) is an extension to DHCPv6. Classical DHCPv6 is typically focused on parameter assignment from a DHCPv6 server to an IPv6 host running a DHCPv6 protocol stack. A practical example would be the stateful address assignment of “2001: db8:: 1” from a DHCPv6 server to a DHCPv6 client. DHCPv6-PD however is aimed at assigning complete subnets and other network and interface parameters from a DHCPv6-PD server to a DHCPv6-PD client. This means that instead of a single address assignment, DHCPv6-PD will assign a set of IPv6 “subnets”. An example could be the assignment of “2001: db8::/ 60” from a DHCPv6-PD server to a DHCPv6-PD client. This will allow the DHCPv6-PD client (often a CPE device) to segment the received address IPv6 address space, and assign it dynamically to its IPv6 enabled interfaces.

Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 2405-2410).  . Kindle Edition.
http://www.cisco.com/c/en/us/support/docs/ip/ip-version-6-ipv6/113141-DHCPv6-00.html

http://en.wikipedia.org/wiki/Prefix_delegation