[ntp:questions] Second attempt at GPS-18 based NTP server

David J Taylor david-taylor at blueyonder.co.uk.invalid
Thu Feb 2 18:05:13 UTC 2012

"unruh" <unruh at invalid.ca> wrote in message 
news:iezWq.4122$W87.2020 at newsfe02.iad...
> On 2012-02-02, David J Taylor <david-taylor at blueyonder.co.uk.invalid> 
> wrote:
>>> On NetBSD-5 with ntpd 4.2.6p5 the default is 64s.
>> I wonder what expertise they have to select polling for reference 
>> clocks?
>> BTW: Paul has FreeBSD.
> The reason for longer polling is a) network load, and b) rate
> optimality.

This was for a reflclock, I believe, not a network server..

> Since that portable is liable to be switched on and off, or moved on a
> timescale of 2^10 sec (20 min) having a poll of 10 on a laptop,
> especially with ntpd's sloooow response time, seems not terribly useful.
> If your network can support it, a much shorter poll for laptops would
> seem to be sensible.

As I explained, when locally connected it can and does use a shorter 
polling interval, whereas when out and about and using someone else's 
network it conforms to the accepted NTP defaults.


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