[ntp:questions] Mixed maxpoll values for mixed LAN/Internet servers - sensible?

David J Taylor david-taylor at blueyonder.neither-this-bit.nor-this.co.uk
Thu Feb 26 23:27:25 UTC 2009

Unruh wrote:
> "David J Taylor"

>>  server lan-gps-pps  prefer iburst  maxpoll 6
>>  server 0.uk.pool.ntp.org iburst
>>  server 1.uk.pool.ntp.org iburst
>>  server 2.uk.pool.ntp.org iburst
>> If I do this, is the maxpoll for the Internet servers also clamped
>> at 6, or will it gradually up to 1024s (10).
> No, not clamped. Maxpoll refers to the specific server it is
> referenced to . In your case lan-gps-pps.

Well, by observation, /all/ the servers are polled at 64s intervals, and 
not just the lan-gps-pps server.

[Caveat, I actually tested maxpoll=7, and all the servers show a poll of 
128s.  Tested with Meinberg's "vegas" ntpd 4.2.4 at p6]

> It depends. Note that it also depends on who owns that refclock. They
> may
> not want people querying it so often.
> Certainly Mills would get annoyed if you clamped the poll interval to
> the
> udel servers at maxpoll 6
> Of course if you own it, you can do as you wish.

Yes, I own it, but I don't want to hit on the Internet servers any more 
than necessary, of course.

Thanks for your reply,

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