Re: [questions] Re: new ntp server organization

2023-04-11 Thread Harlan Stenn
On 4/11/2023 1:28 PM, David Woolley wrote: On 11/04/2023 18:21, Jakob Bohm wrote: I wonder when and why this advice changed from 3 to 4.  When I started I'm pretty sure that Byzantine General protection has been advised for more than 15 years.  It's in the NTPv4 RFC, so it is at least just

Re: [questions] Re: new ntp server organization

2023-04-09 Thread Harlan Stenn
4 is better than 3 because from time to time, one of them will be unreachable. If one uses 3 and this happens, there is nobody to break a tie. I recommend also having these top-tier time sources 'peer' with each other. What is your "interesting" issue with leap seconds? H On 4/8/2023 7:49

Re: [questions] Re: new ntp server organization

2023-04-08 Thread MAYER Hans
Dear All, I would say 3 ntp servers are also fine and good enough as there are never taken more than 3 servers. If there are no stratum-1 server available I would define at least 4 pools for these 3 NTP servers. I can tell you what I have done. Without claim to be correct. I have 3