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NTP servers stopped syncing after upgrade to ONTAP 9.10.1 or later

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Applies to

  • ONTAP 9
  • NTP

Issue

  • NTP servers stopped syncing and report the following after an ONTAP upgrade:
Cluster01::*> cluster time-service ntp status show

Node: Cluster01-01

Server                  Reachable  Selection State                Offset (ms)
----------------------- ---------  ------------------------------ ------------
x.x.x.x                 false      Server Not Responding or Too           0.00
                                   Distant
x.x.x.x                 false      Server Not Responding or Too           0.00
                                   Distant
x.x.x.x                 false      Server Not Responding or Too           0.00
                                   Distant
  • NTP server validation fails:
Cluster01::*> cluster time-service ntp server validate -server x.x.x.x
 
Error: command failed: Unable to query NTP server "x.x.x.x" with address x.x.x.x within 5 seconds.
  • New NTP servers cannot be added

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