[ntp:questions] Re: NTP Time Server for LAN: Broadcasting or Not?
W. D.
WD at US-Webmasters.com
Tue Oct 5 05:58:07 UTC 2004
At 21:40 10/4/2004, Danny Mayer, wrote:
>"W. D." <NewsGroups at US-Webmasters.com> wrote in message
>news:<416106CE.6E4E at US-Webmasters.com>...
>> Hi Folks,
>>
>> I've got a FreeBSD - NTP time server configured on my small LAN. Here's
>> some output:
>>
>> ntpq> pe
>> remote refid st t when poll reach delay offset
>> jitter
>>
>============================================================================
>===
>> +navobs1.wustl.e .USNO. 1 u 41 64 333 178.181 -51.694
>> 131.381
>> +india.colorado. .ACTS. 1 u 37 64 377 192.120 84.779
>> 45.140
>> *navobs1.oar.net .USNO. 1 u 106 64 376 191.750 114.124
>> 110.657
>> +now.cis.okstate .PSC. 1 u 40 64 377 192.337 118.809
>> 53.212
>> 192.168.2.255 .BCST. 16 u - 64 0 0.000 0.000
>> 4000.00
>>
>> ntpq> rv
>> status=06e4 leap_none, sync_ntp, 14 events, event_peer/strat_chg,
>> version="ntpd 4.2.0 at 1.1161-r Sat Oct 2 18:23:29 CDT 2004 (1)",
>> processor="i386", system="FreeBSD/4.9-RELEASE", leap=00, stratum=2,
>> precision=-17, rootdelay=190.042, rootdispersion=208.241, peer=46454,
>> refid=navobs1.oar.net,
>> reftime=c50b792b.ab128f86 Mon, Oct 4 2004 2:24:27.668, poll=6,
>> clock=c50b7a1e.c01e94b3 Mon, Oct 4 2004 2:28:30.750, state=4,
>> offset=-23.313, frequency=-432.127, jitter=165.282, stability=110.396
>>
>> How does one tell if this server is broadcasting properly?
>>
>You look at the clients.
Looked at my Windows client running K9:
http://www.Kaska.demon.co.uk/k9.htm
http://www.hcml.demon.co.uk/k9bin/k9v14.zip
K9 allows one to run with debug info, that answers
the question...
>> How often does it broadcast?
>>
>
>I'd like to know that myself. Looks like I'm going to have to dig
>into the code to find that out.
...approximately every 64 seconds. K9 pops up windows that
tell how much the clock was adjusted, as well as the source IP
address.
>> Is there a way to control how often it broadcasts?
>>
>Unlikely without changing the source code.
64 seconds is fine with me. Changes to the client Windows computer's
clock are just a few milliseconds.
>
>> Also, the '*' and '+' tend to disappear and reappear. Is this
>> possibly due to network congestion?
>>
>
>It could be because of any number of factors. network congestion is
>just one possibility.
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