[ntp:questions] Re: Is my server performing correctly?

Evert Meulie evert at witelcom.com
Tue Nov 23 13:09:16 UTC 2004


Richard B. Gilbert wrote:
> Evert Meulie wrote:
> 
>> Hi everyone!
>>
>> Is there someone out there who can verify that ntp.poboxes.info is up 
>> and running and serving a somewhat correct time?   ;-)
>>
>>
>> Regards,
>>     Evert Meulie
>>
>>
>> PS. Feel free to add this one to your servers list. It's 
>> geographically located in Norway.
> 
> 
> I tried it.  Here's what I did and what happened.
> 
> sunblok_$ ntpdate -d ntp.poboxes.info
> 22 Nov 19:46:23 ntpdate[17898]: ntpdate 4.2.0 at 1.1161-r Sat Jan 31 
> 23:23:54 EST 2004 (9)
> Looking for host ntp.poboxes.info and service ntp
> host found : ti231210a080-2145.bb.online.no
> transmit(80.213.120.99)
> receive(80.213.120.99)
> transmit(80.213.120.99)
> receive(80.213.120.99)
> transmit(80.213.120.99)
> receive(80.213.120.99)
> transmit(80.213.120.99)
> receive(80.213.120.99)
> transmit(80.213.120.99)
> server 80.213.120.99, port 123
> stratum 3, precision -20, leap 00, trust 000
> refid [80.213.120.99], delay 0.13968, dispersion 0.00047
> transmitted 4, in filter 4
> reference time:    c54d0467.4a13d31b  Mon, Nov 22 2004 19:35:51.289
> originate timestamp: c54d06e2.79355475  Mon, Nov 22 2004 19:46:26.473
> transmit timestamp:  c54d06e2.7089aeae  Mon, Nov 22 2004 19:46:26.439
> filter delay:  0.14293  0.14024  0.13968  0.14023
>         0.00000  0.00000  0.00000  0.00000
> filter offset: -0.02290 -0.02408 -0.02412 -0.02347
>         0.000000 0.000000 0.000000 0.000000
> delay 0.13968, dispersion 0.00047
> offset -0.024128
> 
> 22 Nov 19:46:26 ntpdate[17898]: adjust time server 80.213.120.99 offset 
> -0.024128 sec
> 
> Sunblok is actually about 2 microseconds offset from my GPS reference 
> clock.  I'd say that the large correction ntpdate would have applied is 
> due to what appears to be a 140 millisecond round trip delay.  Virtually 
> all the servers that I use are 125 milliseconds closer than that.
> 
> Please note that I'm not suggesting that your server is off by 24 
> milliseconds; I think its impossible to determine the time accurately 
> over such a distance (traceroute counted 31 hops between my server and 
> yours)!!

;-)

Thanks for checking, kind sir!   ;-)


Regards,
	Evert



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