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]  Parameters:         Tag                 Value        interface         - Interface name or index.        address           - IPv6 address to add.        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).  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