https://docs.ntpsec.org/latest/quick.html#pool https://docs.ntpsec.org/latest/discover.html#assoc
With 4 pool servers each returning 4 A records and one of them returning 4 AAAA records, it seems to me you could end up with potentially 20 servers initially, which will then be pruned back to 7 (per tos maxclock*).
* Note that tos maxclock is 11 in the Debian default, as pool entries themselves count. I personally think that's wrong, but changing it creates a compatibility concern.
-- Richard
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