Usage: %1!s! interface= address= / type=]unicast|anycast validlifetime= |infinite preferredlifetime= |infinite store=]active|persistent ...

Usage: %1!s! [interface=] [address=][/]
             [[type=]unicast|anycast]
             [[validlifetime=]|infinite]
             [[preferredlifetime=]|infinite]
             [[store=]active|persistent]
             [[skipassource=]true|false]

Parameters:

       Tag                 Value
       interface         - Interface name or index.
       address           - IPv6 address to add, optionally followed by the
                           subnet prefix length (default 64).
       type              - One of the following values:
                           unicast: Adds a unicast address (default).
                           anycast: Adds an anycast address.
       validlifetime     - Lifetime over which the address is valid.
                           The default value is infinite.
       preferredlifetime - Lifetime over which the address is preferred.
                           The default value is infinite.
       store             - One of the following values:
                           active: Change only lasts until next boot.
                           persistent: Change is persistent (default).
       skipassource      - Do not use the address as source address for any
                           outgoing packet unless explicitly specified.
                           The default value is false.

Remarks: Adds an IPv6 address to a given interface.  Time values can be
         expressed in days, hours, minutes, and seconds; e.g. 1d2h3m4s.

Example:

       %1!s! "Private" fe80::2