[ntp:questions] Troubleshooting who's at fault

David Woolley david at ex.djwhome.demon.co.uk.invalid
Fri Jun 26 07:04:00 UTC 2009

Harlan Stenn wrote:

> If you are using LOCAL as a fallback on your client, and your upstream
> server is using LOCAL ias the name for its PTS-sync'd refid, then the client
> just sees that the 2 sources it knows about are using the same refid and
> will flag that as a loop.
That doesn't sound sensible.  It implies you cannot peer two machines 
that have the same reference clock technology.  Is the problem that 
reference clocks, as a special case, use the same reference ID as the 
stratum 1 server that uses them, and, by the time the check is done, the 
distinction between a reference clock and a server has been lost?

> If the upstream machine is sync'd to PTS with an Rb oscillator, give the
> upstream system a "better" refid name than LOCAL(0) or LOCAL.

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