[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?
bye
David
> 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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