[ntp:questions] server and peer lines correct?

Steve Kostecke kostecke at ntp.org
Mon Apr 7 20:32:09 UTC 2014

On 2014-04-07, Charles Swiger <cswiger at mac.com> wrote:

> On Apr 7, 2014, at 12:12 PM, Harlan Stenn <stenn at ntp.org> wrote:
>> Charles Swiger writes:
>>> For a given S2 server, say NTP1, I'd recommend:
>>> server S1-1 iburst prefer


>> How do you select which server to prefer?
> Absent any detailed knowledge of the stratum-1 servers, network
> topology, etc, I'd simply map them: NTP1 prefers S1-1; NTP2 prefers
> S1-2; NTP3 prefers S1-3, and they all peer with each other.
> Each of the stratum-2s will have a different preferred stratum-1 so
> they have maximum diversity of upstream sources.

Use of the prefer keyword will prevent the S2s from following the best
S1 "truechimer" and push that decision down to the client level.

BTW the effects of the prefer keyword are dowumented at:

Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/

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