I have a case where, within one company, half of the devices synchronize to a set of NTP servers (including a GPS based one), and the other one on another set (also including stratum 1 servers).
I would like to understand how to handle such situation, my only real requirement being that everyone has the same time (even if it is not atomic-time grade). Specifically - is there way to configure the servers so that they take into account the other ones and so that all of them provide a synchronized time?
The NTP FAQ states:
Just one time source will always be trusted
so I would like this choice to be consistent between the two groups.
Respuesta1
Set up a pool of ntp servers to be used internally (2-5 servers is appropriate in a small organization). Have each of them synchronize to external servers (and other time sources if applicable). Have each of the servers in your pool specify the other servers in your pool as peers.
Finally configure your internal hosts to use the servers in your own pool of ntp servers and never directly use external ntp servers.