High offset value in Google's NTP

[Lara G. Cánovas]

Hi

I have syncro issues in many of my servers. My NTP server points to Google's.

The offset time in many of them are important.

I check my NTP server and I am worry about the offset time and other parameters it shows

     remote           refid      st t when poll reach   delay   offset  jitter

==============================================================================

 LOCAL(0)        .LOCL.          10 l    8   64  377    0.000    0.000   0.001

+time1.google.co .GOOG.           1 u   32   64  377   20.776  1061.07   0.027

*time2.google.co .GOOG.           1 u   27   64  377   20.760  1061.10   0.027

+time3.google.co .GOOG.           1 u    2   64  377   20.971  1061.01   0.008

-time4.google.co .GOOG.           1 u    2   64  377   28.596  1060.90   5.215

After restar ntp service

     remote           refid      st t when poll reach   delay   offset  jitter

==============================================================================

 LOCAL(0)        .LOCL.          10 l   55   64    1    0.000    0.000   0.001

+time1.google.co .GOOG.           1 u   38   64    1   20.800  1052.43   3.966

*time2.google.co .GOOG.           1 u   37   64    1   20.763  1055.51   2.214

+time3.google.co .GOOG.           1 u   36   64    1   20.972  1054.10   2.244

+time4.google.co .GOOG.           1 u   35   64    1   28.506  1053.50   2.541

Can you help us to understand why is it happening and how to solve it?

Regards

Lara

[Chris Schrier]

This output appears to be ntpq. From my understanding offset is the time difference, in milliseconds, between the client and the remote server.

What is the latency of these machines from time(1234).google.com? You can use `ping -c 5 time1.google.com` to determine the RTT.

Do you have a log file for your ntp daemon that could be forwarded?

--
You received this message because you are subscribed to the Google Groups "public-ntp-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to public-ntp-disc...@googlegroups.com.
To post to this group, send email to public-nt...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/public-ntp-discuss/07a7ac63-5667-4165-9db0-b2d8941de44d%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Lara G. Cánovas]

Hi

This is my NTP server

I2KCIE:~ # ping time1.google.com

PING time1.google.com (216.239.35.0) 56(84) bytes of data.

64 bytes from time1.google.com (216.239.35.0): icmp_seq=1 ttl=45 time=21.0 ms

64 bytes from time1.google.com (216.239.35.0): icmp_seq=2 ttl=45 time=20.7 ms

64 bytes from time1.google.com (216.239.35.0): icmp_seq=3 ttl=45 time=20.7 ms

64 bytes from time1.google.com (216.239.35.0): icmp_seq=4 ttl=45 time=20.7 ms

Executing the command at the same time: in 2 servers in my domain and my NTP server:

BILL2:~ # date

Wed Jul  3 15:03:17 CEST 2019

BILL1:~ # date

Wed Jul  3 15:09:34 CEST 2019

I2KCIE:~ # date

Wed Jul  3 15:08:04 CEST 2019

They don't have the same time so I have networking issue because of that.

Regards

Lara

To unsubscribe from this group and stop receiving emails from it, send an email to public-ntp-discuss+unsub...@googlegroups.com.

[Chris Schrier]

We don't typically troubleshoot specific NTP issues; however, I'd be very curious to see logs from ntpd (or similar) and your ntpd configuration. 

That RTT seems fine. Is BILL2 the outlier? What the RTT from that machine? 

To unsubscribe from this group and stop receiving emails from it, send an email to public-ntp-disc...@googlegroups.com.

To post to this group, send email to public-nt...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/public-ntp-discuss/07a7ac63-5667-4165-9db0-b2d8941de44d%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

You received this message because you are subscribed to the Google Groups "public-ntp-discuss" group.

To unsubscribe from this group and stop receiving emails from it, send an email to public-ntp-disc...@googlegroups.com.

To post to this group, send email to public-nt...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/public-ntp-discuss/d52bde3b-9d9f-4b67-9c34-87da233a50a4%40googlegroups.com.