It seems as though when I use a config similar to the following I get no IPv6 servers in my pool selections.
pool us.pool.ntp.org iburst
pool north-america.pool.ntp.org iburst
pool pool.ntp.org iburst
only when I add a number prefix (as below) to the entries do I get IPv6 servers in my candidate list.
pool 2.us.pool.ntp.org iburst
pool 2.north-america.pool.ntp.org iburst
pool 2.pool.ntp.org iburst
Do I just not understand what should be configured?