n defined as listed below. The DHCPv6 REPLY is a general purpose message used by the server in response to clients' SOLICIT, REQUEST, RENEW, REBIND, INFORMATION-REQUEST, CONFIRM, RELEASE, and DECLINE messages. CONFIRM: A host that moves to a new link, for example due to changing physical connection or due to a reboot, can use the CONFIRM message to verify from DHCPv6 servers whether the addresses and configuration information it has is still valid [54]. RENEW: A host uses the RENEW message to extend the remaining lifetimes of its leases. The RENEW is unicasted to the DHCPv6 server from where the host got its address allocation [54]. REBIND: If a host has failed to renew its existing binding with the DHCPv6 server it has been communicating with, the host multicasts a REBIND message in an attempt to get some other DHCPv6 server to extend the lifetime of current lease [54]. DECLINE: A host may reject the address is offered by a DHCPv6 server, if the host detects the address is already being used on the same link [54]. RELEASE: A host releases addresses that it has been allocated with a RELEASE message [54]. RECONFIGURE: A DHCPv6 server can send an unicast RECONFIGURE message to a host in order to trigger the host to renew its address(es) and configuration data [54]. INFORMATION-REQUEST: A host may use INFORMATION-REQUEST to ask for various configuration parameters, such as recursive DNS server addresses [54]. RELAY-FORWARD: A DHCPv6 relay uses a RELAY-FORWARD message to encap- sulate the original DHCPv6 message sent by a host [54]. RELAY-REPLY: A DHCPv6 server replying to a DHCPv6 message received within a RELAY-FORWARD message uses a RELAY-REPLY to encapsulate the response message [54]. LEASEQUERY: This message can be used to poll a DHCPv6 server for lease information regarding a specific host, based on an address. The information includes the contents of DHCPv6 options provided for the host of interest. This query does not affect states of the DHCPv6 server [78]. Deploying IPv6 in 3GPP Networks LEASEQUERY-REPLY: A