[ntp:questions] NTP not syncing to configured servers

Wang, Yu ywang10 at fsu.edu
Wed May 13 13:54:32 UTC 2015


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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