[ntp:questions] Thunderbolt at NTP ref clock.

Dave Baxter spam at goes.nowhere.com
Tue Jul 30 14:24:13 UTC 2013

Hi again.

In reference to my other thread.
"THunderbolt monitor/control on Win7 ?"

Well, as that device seems happy in it's potential new home.

I've been poking about the interweb looking for info as to getting the 
TB used as a reference clock for NTP.

I found this page:-

That on the face of it, seems to tell me what I need.

So, poking arround (no changes yet) my ntp.conf file, I "think" I need 

# Trimble Thunderbolt on /dev/gps1 (first serial port)
server    mode 2  minpoll 4 maxpoll 4   prefer
fudge    time1 0.020
fudge    flag2 1  refid GPS
server 0.uk.pool.ntp.org iburst minpoll 5 maxpoll 12
server 1.uk.pool.ntp.org iburst minpoll 5 maxpoll 12
server 2.uk.pool.ntp.org iburst minpoll 5 maxpoll 12

Would this be suitable for general purpose local time sourcing?  With 
fallback to the pool if the TB burps, dies or is otherwise compromised.

Could all the fudge factors go on one line?
(Sorry to ask silly questions, but I don't know, so have to ask.)
If so, in what (if any) order?

The server currently run's FreeBSD 8.0  Uptime over 772 days now, 
without a hitch! Nice...   (I do plan to configure another box, running 
9.x at some point to replace this one.)  

ntpq -crv reports (among other things)...
version="ntpd 4.2.4p5-a (1)"

Recomendations, brickbats etc?


Dave B.

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