DHCPv6 parameter values
These values can be used for the DHCPv6 parameters.
units: second, seconds, minute, minutes, hour, hours, day, days, week, weeks, month, months, year, years
interface: en0, en1, tr0
identifier: numbers or characters
policy: yes, no, true, false
range: ipv6addresss-ipv6addresss
regular expression: "!epression to match$", "!epression to match^"