[ntp:questions] Re: why difference about 200ms with time.nist.gov

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Thu Mar 30 06:49:52 UTC 2006


flyfatpig at gmail.com writes:

> I built a time server with redhat 7.2 and ntp 4.2.0 and Motorola M12T.
> The time server works well.But when I  sync with time.nist.gov ,I found
> my time server is about 200ms later .who can tell me why?
> 
> 
> [root at gt4 lxh]# ntpdate -q 192.168.2.7
> server 192.168.2.7, stratum 1, offset 78.759011, delay 0.02599
> 29 Mar 15:37:32 ntpdate[1090]: step time server 192.168.2.7 offset
> 78.759011 sec

"78 seconds" don't sound much like 200ms to me.

> 
> [root at gt4 lxh]# ntpdate -q time.nist.gov
> server 192.43.244.18, stratum 1, offset 78.958525, delay 0.26364
> 29 Mar 15:38:24 ntpdate[1092]: step time server 192.43.244.18 offset
> 78.958525 sec
> 
> [root at gt4 lxh]# ntpdate -q clock.isc.org
> server 204.152.184.72, stratum 1, offset 78.980319, delay 0.20029
> 29 Mar 15:45:16 ntpdate[1111]: step time server 204.152.184.72 offset
> 78.980319 sec
> 
> where 192.168.2.7 is my time server .




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