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Thread: NTP Drift File drifting

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guys,

have problem maintaining stable ntp sync in following network configuration:

pc1 connected pc2 connected pc3

of them running different linux distributions. pc 2 , 3 run ntp server. pc3 hooked gps receiver , hence has accurate time. pc3 powered on continuesly, pc2 opperating 2 6h day, while pc1 opperating same time pc2.

here how supposed sync:
pc3 syncs gps - works great
pc2 syncs pc3 via ntp - works great
pc1 syncs pc2 via ntp - here issue

pc1 syncs real nice pc2 week or so. after week ntp traffic on network skyrockets 2 ntp polls every second pc2, time sync gets bad - in order of seconds, @ least according ntp message content.
if ntpq pc3 pc1 see following:
- time sync in order of 10 ms
- every 10 seconds daemon on pc1 stops responding

if ntpq pc1 pc3 see massive jitter between +2ms , -10ms.

here fun part: if reset ntp.drift files frquency drift on pc1 -2.00 works fine again. after week drift file changes value arround 1 (last week) , arround 35 week leading problems described above.

heads up: network architecture shall maintained.

ideas problem is?



Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [all variants] NTP Drift File drifting


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