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20031009: rainbow clock is off (cont.)

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  • Subject: 20031009: rainbow clock is off (cont.)
  • Date: Thu, 09 Oct 2003 11:28:47 -0600
>From: Eirh-Yu Hsie <address@hidden>
>Organization: Aeronomy Laboratory/NOAA
>Keywords: 200309291535.h8TFZhk1020058 IDD ntpd ntpdate clock

Hi Hsie,

re: setting the clock on rainbow (and other CIRES machines)

>My original configuration is that one machine (cirrus) synchronizes to 
>NIST machine, and all others are multicast clinets.  I just find out 
>that there are at 8 multicat NTP server signal in out net.  So my 
>clients are sync to different servers.  I already change my 
>configuration.  All of them now are pointing explicitly to my local 
>server (cirrus) by adding a server line.  Hope this will increase the 
>accuracy.

Excellent.  A quick look at the IDS|DDPLUS latency plots for rainbow:

http://www.unidata.ucar.edu/cgi-bin/rtstats/iddstats_nc?IDS|DDPLUS+rainbow.al.noaa.gov

indicates that your change has had a positive effect.  Monitoring the
latencies over an extended period of time will tell us if this fixed
the problem for good.

>rainbow:[44]# /usr/sbin/ntpdc
>ntpdc> peers
>      remote           local      st poll reach  delay   offset    disp
>=======================================================================
>*LOCAL(0)        127.0.0.1       10   64  377 0.00000  0.000000 0.00093
>=cirrus          5.0.0.0         16  128    0 0.00000  0.000000 0.00000
>ntpdc> sysinfo
>system peer:          LOCAL(0)
>system peer mode:     client
>leap indicator:       00
>stratum:              11
>precision:            -17
>root distance:        0.00000 s
>root dispersion:      0.01181 s
>reference ID:         [127.127.1.0]
>reference time:       c33012f2.a8abd5dc  Thu, Oct  9 2003 11:01:38.658
>system flags:         auth monitor ntp kernel stats
>jitter:               0.000000 s
>stability:            0.000 ppm
>broadcastdelay:       0.007996 s
>authdelay:            0.000000 s
>ntpdc>

Looks much better than before.  Thanks for the quick action!

Cheers,

Tom