Patrick Nolan wrote: > I'm located at a university. We have a master Stratum 1 server with a > GPS clock. We also have at least four Stratum 2 servers which are > synchronized with the master. These are all very close, with delay > and offset values less than 1. How should I use these resources? > > Should I put them all in ntp.conf?
No! If the stratum two servers are using only the University's stratum one server as a source, they provide you with no diversity. > Should I use only the Stratum 2 servers? No! > Should I include one or more independent servers from somewhere else? Yes. I would configure the University's stratum one server as one time source and include at least three other independent sources! Four independent servers are the minimum for a robust configuration. Choose servers that are close to you in network space. A server in the next room that is reachable only by a 3,000 mile path through several networks is 3000 miles away for your purposes! Look for servers with low values of delay; less than twenty milliseconds is okay, less than ten is great! Ntpd will probably select the University's stratum one server as its primary source; the rest will serve as a sanity check and as a backup should your stratum one server fail. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
