[ntp:questions] Problem facing with Ntp client Configuration

David Lord snews at lordynet.org
Thu Mar 27 23:53:05 UTC 2014

William Unruh wrote:
> On 2014-03-27, David Lord <snews at lordynet.org> wrote:
>> Biswajit Panigrahi wrote:
>>> Hi Mayer,
>>> I have done the required changes. I have found one problem regarding condition field in ntpq
>>> When ever I have restarted ntpd on client and executed ntpq "as"
>>> atcafs-n11s2:~# ntpq
>>> ntpq> as
>>> ind assid status  conf reach auth condition  last_event cnt
>>> ===========================================================
>>>   1 45503  9044   yes   yes  none    reject   reachable  4
>>> Condition field shows "reject" for more then 15 to 20 minute then after it changes to "sys.peer" after then only sync happens.
>>> I have opened the port 123 for ntp. Still it shows reject 
>>> Please let me know reason for this to fix the issue
>> Why do you believe there is an issue to be fixed?
>> Ntpd takes a certain amount of time to sync after a restart.
>> You could add a few more ntp sources. Three sources are not
>> enough, four is good, five is safer.
> Why not 4397523 servers? Even better. 

Why not read up on what ntpd does and cannot do?

I'm sure you knew the answer before you posted that?



> Use 1 if you want. The problem is, what if that one goes down or goes
> crazy. If it is yours fix it. If not, use another. 3 guards against one
> going crazy. As you up the numbers you guard against more and more going
> crazy. But since the probability of one going crazy is low, you may just
> decide to live with it. 
>> One of my servers, ntp-dev 4.2.7p433, was restarted on Mar 15:
>> time   remote  st  reach   offset
>> 18:36  oPPS     0    377   -0.001
>> reboot
>> 18:42   PPS     0      0    0.000
>> 18:48  oPPS     0     37  -60.233
>> 18:54  oPPS     0    377   -0.004
>> 19:00  oPPS     0    377   -0.001
>> Other servers without pps take a few minutes longer to sync.
> It depends on the poll interval. pps has a 16 second poll interval. Most
> others have a 64 sec initial poll interval, simply so as to not put to
> much stress on the server. If it is your own server you can stress it
> all you are comfortable with. 

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