[ntp:questions] Re: Cannot synchronize to server with local clock
Serge Bets
serge.bets at NOSPAM.laposte.invalid
Fri Jul 22 08:53:38 UTC 2005
Hello Brian,
On Thursday, July 21, 2005 at 1:37:17 PM +0000, Brian T. Brunner wrote:
Beware: Your mail client breaks the discussion thread.
> the 'stratum 8' tactic should be a 'server' line, or should it be a
> 'fudge' line?
"fudge" modifies parameters of the refclock declared on a "server" line:
You need both lines, with "stratum 8" on the "fudge", and no "prefer".
| server 127.127.1.0
| fudge 127.127.1.0 stratum 8
> Where does LOCAL appear?
In the list of refclocks and servers of a machine given by the
"ntpq -p machine" command, example:
| remote refid st t when poll reach delay offset jitter
| ==============================================================================
| *SHM(0) .DCF1. 0 l 65 64 377 0.000 0.056 0.123
| +SHM(1) .DCF2. 0 l 328 1024 377 0.000 0.025 0.304
| SHM(2) .RDC2. 0 l - 64 0 0.000 0.000 4000.00
| SHM(3) .CMOS. 0 l 40 1024 377 0.000 -1350.3 76.705
| LOCAL(0) 73.78.73.84 8 l 12 64 377 0.000 0.000 0.002
You see that machine has 5 refclocks no servers, the "*" shows the
current syspeer, the "+" sources contributing to sync, and " " space
unselected clocks.
Now if I stop DCF77 receiver, the "*" will go on SHM(1) for some hours,
then on LOCAL(0) for the rest of eternity: Machine can continue to serve
clients forever. A slowly wandering time, though. Depending on the
situation, your goals and constraints, this may be good or evil. For my
personal LAN I don't want eternal fake sync (I value true time), and the
contrary for another LAN where it's a necessity (isolated no refclock).
Serge.
--
Serge point Bets arobase laposte point net
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