12. Requesting Router Initiated Prefix Delegation

A requesting router uses the same message exchanges as described in section 18, "DHCP Client-Initiated Configuration Exchange" of RFC 3315 to obtain or update prefix(es) from a delegating router. The requesting router and the delegating router use the IA_PD Prefix option to exchange information about prefix(es) in much the same way IA Address options are used for assigned addresses.