[ntp:questions] Synchronizing using servers in stratum 1 and 2

Timo Ruiter timo.ruiter at xs4all.nl
Tue Feb 13 19:04:49 UTC 2007

David Woolley schreef:
> In article <45cf33d4$0$321$e4fe514c at news.xs4all.nl>,
> Timo Ruiter <timo.ruiter at xs4all.nl> wrote:
>> When you are assigned *one* stratum-1 server and *two* stratum-2 servers 
>> your clock will obviously synchronize to the stratum-1 server. But that 
> It will synchronize to a mixture of the times from all three servers, but
> weighted in favour of the stratum 1 one, I believe.  Although it only
Can anyone confirm this?
> reports one server as reference source, it actually makes use of timing
> information from several of them.
>> being the case, what is the use of the two stratum-2 servers, assuming 
>> that the stratum-1 server will not go off-line?
> They can outvote the stratum one server if it is giving the wrong time.
> Note that some people reckon that you need four servers for this to
> work reliably.

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