We recently started to receive error alerts from our NetApp monitoring services saying that our NetApp is not NTP synchronized with any peer, so it's time may be incorrect. It says:
NTP is running, but no peers have passed the selection process. The local time may be too far off; or the configured NTP peers may not be reachable.
I check the ntp.conf to ensure valid time servers are listed, I also turned ON/OFF "options timed.enable".
Next, I looked into this article: https://kb.netapp.com/support/index?page=content&actp=LIST&id=S:1012660
After following all the instructions, I was able to see the error message that might be truly the root cause of the problem: I think it says the NTP server is reachable, but it was rejected by the following reason:
It says flash=400 not_proventic.
At this point I'm stuck and not sure how to proceed further. Any help would be greatly appreciated.