[ntp:questions] NTP - orphan mode with SAME stratum ("tos orphan 6") FAIL to sync.

sheikdawoodrajali at gmail.com sheikdawoodrajali at gmail.com
Mon Apr 6 23:49:52 UTC 2009

On Apr 6, 12:40 pm, Steve Kostecke <koste... at ntp.org> wrote:
> On 2009-04-02, sheikdawoodraj... at gmail.com wrote:
> > I am testing "Time Island" in NTP on Windows platform. I built the
> > binaries using source downloaded from meinberg site.
> > Binaries built successfully and I'm testing it now.
> > NTP on ALL the nodes (7 nodes) with SAME stratum "orphanstratum 6"
> > identically configured both as broadcast client and broadcast server
> > ("Time Island") works fine.
> So yourOrphanBroadcast Mesh works when none of the systems are
> configured with real time sources.
> > Problem: --------------
> > When all the 7 nodes have the same config, using "orphanstratum 6"
> I don't understand what you mean by:
> > and using the primary/secondary network broadcast FAILED to time-sync.
> Would you please post a sample configuration file? Please omit any
> commented out configuration options.
> --
> Steve Kostecke <koste... at ntp.org>
> NTP Public Services Project -http://support.ntp.org/

Yes, that's what I'm experimenting now.

I beleive the Orphan Broadcast Mesh will work when none of the
systems configured with external time servers at all. Thoughts??

I saw it working time-sync'ed after adding shim value "tos mindist
0.010" for correctness interval.

I beleive the "time island" concept will work fine and time-sync will
regardless of ANY time set in ALL the nodes running NTP service.

-or- Is there any restrictions in time difference on a time island (30
minutes or less)??

Here is the "ntp.conf" file on ALL the systems (7 nos):
driftfile "C:\Program Files\NTP\etc\ntpd.drift"
keys "C:\Program Files\NTP\etc\ntpd.keys"
trustedkey 1

# Any clock offset will be accepted
tinker panic 0

#shim added to the correctness interval
tos mindist 0.010

# We participate as orphans to auto-find a Time Server
tos orphan 6

# Default restrict all
restrict default ignore

# Allow local host for utilities like ntpq
restrict mask

# Allow communication over primary
restrict <primary IP> mask nomodify notrap

# Allow communication over secondary
restrict <secondary IP> mask nomodify notrap

broadcast xx.yy.255.255 key 1
broadcast xx.zz.255.255 key 1

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