LKBEN10681: Howto monitor the time difference and synchronisation on all domain controllers at once
LKB | Created: 02/04/2020 | Version: 0 | Language: EN | Rating: 0 | Outdated: False | Marked for deletion: False
Author: Wim Peeters - Keskon GmbH & Co. KG
Symptom
You need to control the time synchronisation
Cause
This can be usefull if you find kerberos errors in your event log
Solution
The time syncronisation is done by the PDC Emulator. This server should have a good time source for synchronising the clock. With the command
w32tm /monitor
SRV1.lubby.org [10.1.20.10]:
ICMP: 0ms delay.
NTP: +0.0000650s offset from SRV1.lubby.org
RefID: SRV2.lubby.org [10.1.20.11]
SRV1.lubby.org *** PDC *** [10.1.20.11]:
ICMP: 0ms delay.
NTP: +0.0000000s offset from SRV2.lubby.org
RefID: 'LOCL' [76.79.67.76]
SRV3.lubby.org [10.10.0.5]:
ICMP: 20ms delay.
NTP: -0.0139294s offset from SRV2.lubby.org
RefID: SRV2.lubby.org[10.1.20.11]
you can check the time differences on the domain controllers. In the output you will find *** PDC *** which is the PDC emulator. This system has no timing difference because it is the time source.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.