[ntp:questions] Re: uk pool problem

Richard B. Gilbert rgilbert88 at comcast.net
Mon Aug 28 22:22:52 UTC 2006


Eugen COCA wrote:

>>From my Stratum 1 server:
> 
> ntp1# ntptrace 84.92.75.21
> blackhole.arlott.org.uk: stratum 1, offset -0.002353, synch distance
> 0.006055, refid 'DCFa'
> 
> 
> So, all things seems to be OK !
> 

I just tried the following:
sunblok_$ ntpdate -du blackhole.arlott.org.uk
28 Aug 18:19:26 ntpdate[13166]: ntpdate 4.2.1p241-RC at 1.1498 Wed Apr 26 
20:16:59 EDT 2006 (1)
Looking for host blackhole.arlott.org.uk and service ntp
host found : blackhole.arlott.org.uk
transmit(84.92.75.21)
receive(84.92.75.21)
transmit(84.92.75.21)
receive(84.92.75.21)
transmit(84.92.75.21)
receive(84.92.75.21)
transmit(84.92.75.21)
receive(84.92.75.21)
transmit(84.92.75.21)
server 84.92.75.21, port 123
stratum 15, precision -20, leap 00, trust 000
refid [84.92.75.21], delay 0.15500, dispersion 0.00000
transmitted 4, in filter 4
reference time:    bc17c1ff.00000000  Fri, Dec 31 1999 18:59:59.000
originate timestamp: bc17c1ff.00000000  Fri, Dec 31 1999 18:59:59.000
transmit timestamp:  c89dea6e.eef5df4c  Mon, Aug 28 2006 18:19:26.933
filter delay:  0.16431  0.15500  0.15509  0.15636
          0.00000  0.00000  0.00000  0.00000
filter offset: -2101187 -2101187 -2101187 -2101187
          0.000000 0.000000 0.000000 0.000000
delay 0.15500, dispersion 0.00000
offset -210118767.738966

28 Aug 18:19:27 ntpdate[13166]: step time server 84.92.75.21 offset 
-210118767.738966 sec

It sure doesn't look okay to me!!!!!  OTOH the output of
sunblok_$ ntpq -p 84.92.75.21
      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
*SHM(0)          .DCFa.           0 l   37   64  377    0.000   -1.798 
  0.404
  SHM(1)          .MSFa.           0 l  688   64    0    0.000    0.000 
4000.00
+ntp0.nl.uu.net  .GPS.            1 u  424 1024  377   62.042   -1.119 
  1.750
-ntp1.nl.uu.net  .GPS.            1 u  418 1024  277   61.927    0.275 
  1.153
+tik.cesnet.cz   .GPS.            1 u  388 1024  377   69.535   -1.671 
  1.024
-ntp1.sp.se      .PPS.            1 u  386 1024  377   83.789   -2.838 
  6.061
+ntp2.sp.se      .PPS.            1 u  408 1024  377   84.089   -1.783 
  2.341
+ntp-galway.hea. .GPS.            1 u  418 1024  377   69.287   -1.425 
  0.733
+ntps1-0.cs.tu-b .PPS.            1 u  406 1024  377   78.190   -2.083 
  2.960
  batman.npl.co.u 139.143.49.13    2 u   62 1024  377   51.350   -3.677 
   4.123
  ntp2.npl.co.uk  78.84.80.0       2 u   28 1024  377   56.097    1.949 
  12.404
sunblok_$ ntptrace 84.92.75.21
blackhole.arlott.org.uk: stratum 1, offset -0.001798, synch distance 
0.004925, refid 'DCFa'

Looks quite reasonable.




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