Esxi ntp not updating
Then these servers were flooded with NTP monlist command sent from spoofed source address.
If you are lucky then the outcome of the support call will be that your environment is not prone to this issue, or you will be able to check for early indicators and already know suitable countermeasures.
If you are not interested in this educational part of my post then you can skip this section now and jump directly to the How to install the VIB package part.
The VIB package does the following - when installed -: 1.
I had to set my upstream server as my own clock with IP address 127.127.1.0 to make my server's clock synchronized.
The reply from the ESXi server shows that the leap indicator is 3 and the server stratum is 0.