[ntp:questions] how to have offset < 1ms

lhommedumatch ludocluba at yahoo.com
Tue Apr 13 08:28:26 UTC 2010


On 13 avr, 08:42, "David J Taylor" <david-
tay... at blueyonder.co.uk.invalid> wrote:
> > ntpq -p
> >     remote           refid      st t when poll reach   delay
> > offset  jitter
> > ==============================================================================
> > *ntpgmtaceb      .1PPS.           1 u   20   64  377    0.144
> > -0.373   0.863
>
> > So it's seems to be really better, isn't it?
>
> If that is good enough for you, then the problem is solved.  On my own
> LAN, where I wanted to improve the performance of the Windows-based NTP
> clients, I reduced the poll interval in the ntp.conf:
>
> server  ntpgmtaceb  iburst  maxpoll 5
>
> This will make the client contact the server once every 32 seconds (2^^5),
> but that's no great load on either server, LAN or client.  The "iburst"
> will speed up the initial sync.
>
> Cheers,
> David

After one night, the delay is 29.626
     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
*ntpgmtaceb      .1PPS.           1 u  406 1024  377   29.626
0.867   1.231

if I put the line:
server  ntpgmtaceb  iburst  maxpoll 5

ntpq -p:
No association ID's returned

If I run
ntpdate ntpgmtaceb
and I restart ntpd
delay is 0.169:

     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
 ntpgmtaceb      .1PPS.           1 u   12   64    1    0.169
3.814   0.001

ntpdate seems to be better?




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