I have a question about NTP synchronization. If we have multiple NTP servers in our internal network (3 or more) and first server is synchronizing with an external NTP servers, GPS or other reference time. Second server is synchronizing with first server and third server with second server, then what happened if each server can not communicate with upper layer?
Clients are synchronizing with third server and if third server couldn't communicate with upper layer, what will be happened for clients?
This is not real scenario but I want to understanding impact of internet outage or any other connectivity outage on our clients.
Linux clients showing * left of NTP server address and it's an indicator about NTP server communication.
What does it mean, if * is not showing but NTP server was reachable on network?