[ntp:questions] NTP not syncing to configured servers

Dallas Graves dallasg79 at gmail.com
Wed May 13 14:12:06 UTC 2015


To expound upon Yu’s comment.  If you don’t have access to the firewall, a good check would be to conduct a test against each of your targeted NTP servers with the “ntpdate -d” command, which is the debug switch and will let you know if you can or cannot reach the intended systems.

-Dallas


> On May 13, 2015, at 8:54 AM, Wang, Yu <ywang10 at fsu.edu> wrote:
> 
> Do your ntp servers have public IP addresses configured or do you do NAT for the two ntp servers? 10.126.142.198 and 10.126.142.204 are private addresses and won't be routed over the Internet. 
> The second place to check is firewall. Make sure it opens to upd/123 between your ntp servers and outside ntp servers.
> 
> Yu
> Core Networking, FSU
> 
> 
> -----Original Message-----
> From: questions [mailto:questions-bounces+ywang10=fsu.edu at lists.ntp.org] On Behalf Of Chandrakanth K
> Sent: Wednesday, May 13, 2015 7:52 AM
> To: questions at lists.ntp.org
> Subject: [ntp:questions] NTP not syncing to configured servers
> 
> Hi,
> 
> I am seeing ntp not syncing to external configured servers. We tried both 4.2.4 and 4.2.6 versions.
> The following is the configuration,
> 
> We use two servers 10.126.142.198 and 10.126.142.204 in our Lab.
> They are statically configured as running @ stratum level 5 and providing the clock from its own local clock.
> 
> Even though the servers does not have a valid reference time and provides time from its own clock, according to me still we need to be able to sync to it since it is running at better stratum.
> Please clarify.
> 
> Logs:
> -------------------------
> 
> bash-4.2$ ntpq -np -c assoc
>     remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *127.127.1.0     .LOCL.          10 l   19   64  377    0.000    0.000   0.001
> 10.126.142.198      LOCAL(0)         6 u    7   16  377    0.172  859.844   0.501
> 10.126.142.204      LOCAL(0)         6 u   15   16  377    0.227  1057.22   0.240
> 
> ind assID status  conf reach auth condition  last_event cnt ===========================================================
>  1 26554  9614   yes   yes  none  sys.peer   reachable  1
>  2 26555  9014   yes   yes  none    reject   reachable  1
>  3 26556  9014   yes   yes  none    reject   reachable  1
> 
> Logs: 10.126.142.198
> -----------------------------------
> bash-4.2$ ntpq -np -c assoc
>     remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *127.127.1.0     .LOCL.           5 l   10   64  377    0.000    0.000   0.000
> 
> ind assid status  conf reach auth condition  last_event cnt ===========================================================
>  1 48508  965a   yes   yes  none  sys.peer    sys_peer  5
> 
> 
> Logs: 10.126.142.204
> -----------------------------------
> 
> bash-4.2$ ntpq -np -c assoc
>     remote           refid      st t when poll reach   delay   offset  jitter
> ==============================================================================
> *127.127.1.0     .LOCL.           5 l   13   64  377    0.000    0.000   0.000
> 
> ind assid status  conf reach auth condition  last_event cnt ===========================================================
>  1 32737  963a   yes   yes  none  sys.peer    sys_peer  3
> 
> 
> Regards
> Chandrakanth
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