[ntp:questions] why does asterisk still show after the ntp server is shutdown?

unruh unruh at invalid.ca
Fri Nov 16 17:15:24 UTC 2012


On 2012-11-16, Jun Hu <duanshuidao at hotmail.com> wrote:
>
> Hi David
>
>
> You've only lost three of the last 8 samples from that server. 
>
>
>
> ---> where do you  get that ?  the "reach" value  or other ?

Yes. One bit for each of the last 8 polls. Three bits are zero, and 5
bits are 1 (indicating reply received)

>
>> From: david at ex.djwhome.demon.invalid
>> To: questions at lists.ntp.org
>> Date: Fri, 16 Nov 2012 11:38:26 +0000
>> Subject: Re: [ntp:questions] why does asterisk still show after the ntp	server is shutdown?
>> 
>> Jun Hu wrote:
>> 
>> > 
>> >      remote                      refid            st t when poll reach   delay     offset      jitter
>> > ==============================================================================
>> > *192.168.227.148 LOCAL(0)        12 u  197      64  370       0.205   36.638   2.993
>> > 
>> > 
>> > 
>> > 
>> > My expected is that  the "*" should be disappeared  after Server A shutdown , Is it right? 
>> > 
>> > 
>> > why does asterisk still show after the ntp server is shutdown?
>> 
>> You've only lost three of the last 8 samples from that server.  You will 
>> have to wait until there are rather less recent samples available before 
>> it gets disqualified.
>> 
>> Also, I have a feeling that, if it is the only one, it may stay selected 
>> until the root dispersion grows too large, as it was the last valid 
>> system peer and the estimated error is still acceptable (downstream 
>> systems can make their own judgements, based on root dispersion, as to 
>> whether or not to trust it).
>> 
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