[ntp:questions] Setting up a NTP Time Server

Richard B. Gilbert rgilbert88 at comcast.net
Tue Apr 8 12:01:32 UTC 2008

Hal Murray wrote:
>> Can someone point me to a good document that
>> shows how to setup a Time Server?  I have an
>> isolated network that cannot get to the Internet
>> to sync time.  I have Solaris 8,9,10 and Red Hat Linux
>> Advanced Server 4 servers as potential time server
>> candidates.
> I don't know of any document that covers this case.
> It does come up occasionally.  There might be some
> ideas in the newsgroup archives.
> I think your top level decision is do you want to setup
> a refclock or do you want to coast between manual corrections.
> For under $100 you can rig up a GPS clock.  The Garmin
> GPS 18 LVC is usual suggestion.  That will give you good
> time.  I don't know anything about Solaris.  Linux needs
> a serious patch to get PPS support.  Without PPS support,
> your time won't be "good".  It will be much better than
> coasting without any refclocks.

Solaris has some sort of "PPS support".  My Motorola M12+T feeds the PPS 
into, I believe, the DCD pin on the serial port.  I'm not familiar with 
the Garmin driver; it may or may not have that support built in.  If 
not, ISTR reading about a PPS driver.

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