DHCPv6 client settings/options DHCP unique identifier (DUID) to be sent by dhcpv6 client duid DHCP unique identifier (DUID) Acquire only config parameters, no address DHCPv6 prefix delegation interface statement instance number Prefix delegation instance (>= 0) Request IPv6 prefix length from peer 32-64 Length of delegated prefix 64 Delegate IPv6 prefix from provider to this interface Local interface address assigned to interface >0 Used to form IPv6 interface address (default: EUI-64) Interface site-Level aggregator (SLA) 0-128 Decimal integer which fits in the length of SLA IDs Wait for immediate reply instead of advertisements IPv6 temporary address