Where duid-type is either duid-llt duid-en or duid-ll and string is the client identifier value. The int8 and uint8 data types specify signed and unsigned 8-bit integers. The int16 and uint16 data types specify signed and unsigned 16-bit integers. The uint32 data type specifies an unsigned 32-bit integer. The int32 data type specifies a signed 32-bit integer. dhclient (the client) is used for connecting to a. The ip6-address data specifies an IPv6 address, like ::1 or 3ffe:bbbb:aaaa:aaaa::1. The Tag and Name columns in the table provide a cross reference to the Internet standard option definitions. The ISC DHCP package contains both the client and server programs for DHCP. The following table summarizes the DHCPv6 options currently supported (as of DHCPD 4.2.2) along with the corresponding ISC DHCP option-name and option-value data type. option-value is the actual value of the option to provide to the client.option-name is the name of the option according to the server.option is the keyword indicating that an option is specified on this line.Within the relevant scope the option is declared using the following general syntax which is equivalent to that for DHCP for IPv4: DHCPv6 option values can be defined on a global or scoped basis to influence the configuration parameters of devices initializing via DHCP.