[ntp:questions] Synchronize clocks without a reference clock
kostecke at ntp.isc.org
Thu Mar 22 13:00:56 UTC 2007
On 2007-03-22, Spoon <devnull at localhost.com> wrote:
> The documentation also states:
> tos orphan stratum
> If stratum is set at some value less than 16 a special orphan mode
> is enterred when no outside source of synchronization is available. To
> use orphan mode a number of
Here's the configuration you need:
> [1.] participants are identically configured both as broadcast client
> and as broadcast server.
This means you have to add the following configuration directives to the
ntp.conf for _each_ participant:
broadcast <broadcast_address> <authentication>
And you have to either (a) disable authentication or (b) configure
symmetric keys or (c) configure autokey. If you use symmetric keys
<authentication> will be 'key N'; where N is the shared key number.
If you use Autokey <authentication> will be 'autokey'
> [2.] One or more participants are configured to use an outside source,
> either a reference clock or another Internet server.
With the usual server lines.
Plus each participant will also need the 'tos orphan N' line,
> It is not clear to me how the two computers from my example find each
The broadcast clients (i.e. all the participants) are listening on for
the broadcast servers (i.e. all the participants) on the broadcast
> ([A and B] are not in the same subnet)
> One or several routers forward packets to/from these two subnets.
> Broadcast traffic is not forwarded by the routers.
That would rule out the use of ophan mode.
Steve Kostecke <kostecke at ntp.isc.org>
NTP Public Services Project - http://ntp.isc.org/
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