[ntp:questions] Manycast

Evandro Menezes evandro at mailinator.com
Tue Dec 1 16:17:53 UTC 2009


I got manycast working thanks to your help.

However, I noticed that the manycast servers are usually dropped after
being reached 377 "times" without ever becoming selected, though
they're all a ms away from each other.

For instance, at one moment a client has:

remote           refid           st t when poll reach   delay
offset  jitter
==============================================================================
*time-server1    .GPS.            1 u    5   64  377   41.583
-2.303   1.886
 NTP.MCAST.NET   .ACST.          16 u    -   64    0    0.000
0.000   0.002
 foo             10.46.4.151      2 u    2   64  377    0.179
-1.245   0.675
 bar             10.46.4.151      2 u    2   64    3    0.178
-1.832   0.111

At another, merely 7s later:

remote           refid           st t when poll reach   delay
offset  jitter
==============================================================================
*time-server1    .GPS.            1 u   12   64  377   41.583
-2.303   1.886
 NTP.MCAST.NET   .ACST.          16 u    -   64    0    0.000
0.000   0.002
 bar             10.46.4.151      2 u    9   64    3    0.178
-1.832   0.111

I think that foo was not selected because of the NTP algorithm, but
why was it dropped after reaching 377?

TIA




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