Time synchronization problems can occur due to vCenter NTP server unreachable issues. Bobcares, as a part of our Windows Hosting Support offers solutions to every query that comes our way.

Solution For vCenter NTP Server Unreachable Issues

There may be problems with time sync and other parts of the virtualized environment if the vCenter Server is unable to connect to the NTP server. The NTP server unreachable problem can be fixed in the following ways:

1. Verify that the vCenter Server computer can connect to the NTP server. Verify that the vCenter Server can connect to the NTP server and that there are no network-related problems.

2. Check that the hostname or IP address that vCenter has configured for the NTP server is accurate. Check the NTP server address again for any typos or errors.

3. Verify that the vCenter Server machine is executing the NTP service.

4. Make sure that any firewalls positioned in between the vCenter Server and the NTP server permit the passage of NTP traffic (UDP port 123).

5. To manually verify NTP connectivity between the vCenter Server and the NTP server, use the ntpdate or w32tm commands.

6. To implement any modifications we have made to the NTP settings, restart the vCenter Server’s NTP service.

7. Look for any NTP-related problems or warnings in the vCenter logs that could provide us some insight into the problem. On Windows-based vCenter Servers, the logs are often found in the C:\ProgramData\VMware\vCenterServer\logs directory.

8. We can also try restarting the vCenter services to see if it resolves the problem.

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Conclusion

The article offers 8 troubleshooting tips for the vCenter NTP server unreachable issues.