[ntp:questions] Does NTPClient need to be enabled for clients

Richard B. Gilbert rgilbert88 at comcast.net
Fri Feb 12 16:14:39 UTC 2010


Ace Fekay [MVP-DS, MCT] wrote:
> "Richard B. Gilbert" <rgilbert88 at comcast.net> wrote in message 
> news:b_ydnaulocUc6OjWnZ2dnUVZ_g-dnZ2d at giganews.com...
>> Rob wrote:
>>> Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups at NTLWorld.COM> 
>>> wrote:
>>>>> We use our one of our data centers internal default gateway (Router).
>>>>> Everything feeds off of that.
>>>>> It had best work well. It was $100K +.
>>>>>
>>>> So what benefit is that $100K extra stratum gaining you?  It has to be 
>>>> more than just splitting the UDP/IP path to the lower stratum servers in 
>>>> twain.  But it's not reliability, because if your router goes down it 
>>>> still takes your NTP server with it.  So what is it?  Do you perhaps
>>> The big advantage of such a setup is that all your systems will agree
>>> on the same time.  Locally you have short roundtrip time variations so
>>> the polls of the local NTP server have small jitter and are not affected
>>> by the loading of the internet link.
>>>
>>> It is usually more important that all systems have the same time, than
>>> that this time is very accurate.
>> If you can get all systems to agree on the time it's usually no more 
>> difficult to get them to agree on the *correct* time!  The rock solid 
>> "beat" of a GPS is easy for most clocks to march to!
>>
> 
> 
> Wait a sec, all systems *agree* on a time? It's not a political election 
> process with time management in an AD infrastructure. The PDC Emulator in 
> the forest root is the time source for a forest. There is no Klingon 
> dissention to take over. :-) Just sync that guy, and if it is off, 
> everything else will be. Nothing to agree or disagree on among machines.
> 
> Ace
> 
> 
> 
I didn't mean to imply that systems were, or should be, negotiating a 
mutually agreeable time.  I used "agree" in the sense that you should 
get the same answer whether you query the the USNO in the Washington, DC 
area or the NIST sites in Colorado, Hawaii,  after correcting for travel 
time.




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