topic Re: NTP is not synching in Operating System - HP-UX

NTP is not synching

Khashru — Mon, 04 Dec 2006 21:36:24 GMT

I have 8 ntp clients running on hpux 11i and the ntp server is on solaris8.

Day by day the time difference between NTP server and client is increasing. But the cliens can see ntp server without error.

$ /usr/sbin/ntpq -p
remote refid st t when poll reach delay offset disp
==============================================================================
ausyd01sv011.to 192.168.101.2 15 u 606 1024 377 0.93 13696.8 50.81

Re: NTP is not synching

Ragu_3 — Tue, 05 Dec 2006 00:41:52 GMT

Verify whether port 123 for both tcp and udp is open.

Re: NTP is not synching

Steven E. Protter — Tue, 05 Dec 2006 01:39:29 GMT

Shalom,

it also won't synchronize if the time idfference is too great. You will see a failure message in /var/adm/syslog/syslog.log. If so manually adjust the clock and retry.

SEP

Re: NTP is not synching

Alpha977 — Tue, 05 Dec 2006 04:03:42 GMT

Hello!

Post the ntp logs.

Regards

Re: NTP is not synching

Khashru — Tue, 05 Dec 2006 17:05:44 GMT

It can reach the ntp server. communication is also good. also time difference is very less. like 2 / 3 second.

But the time difference is increasing

$ /usr/sbin/ntpq -p
remote refid st t when poll reach delay offset disp
==============================================================================
ausyd01sv011.to 192.168.101.2 15 u 851 1024 377 0.49 1408.08 44.92

Re: NTP is not synching

iliviu — Wed, 06 Dec 2006 02:09:38 GMT

stratum is 15 (maximum that can be achieved)

man ntp :
The character in the left margin indicates the fate of this peer in the clock selection process. The codes mean:
discarded due to high stratum and/or failed sanity checks;

The solution would be to pick another ntp server to sync with, or alter the stratum of this server.

Another command I found useful in debugging ntp is:
ntpq -c assoc