Solved

NTP server, one DC updates correctly another adds 4 minutes

Posted on 2013-02-07
4
335 Views
Last Modified: 2013-02-26
I have two data centers in two different physical locations about 60 miles apart (in the same timezone).  I have them both acting as NTP servers for the respective domains.  They are syncing time to north-america.pool.ntp.org.  When I restart the w32time service both system logs indicate they are receiving good data from north-america.pool.ntp.org.

I then change the time manually so both servers have the same time and run w32tm /resync /nowait on each server.  One server corrects itself to the correct time.  The other server corrects itself to the correct time for just a instant then it suddenly goes 4 minutes into the future.

Every resync does the same thing.  They match for just a second then boom 4 minutes ahead.  Any suggestions on how I find out whats really going on here with this one server?

The server that works correctly is running Server 2003 SP2, the one that is visting the future is 2008R2.
0
Comment
Question by:-Darvin-
  • 3
4 Comments
 
LVL 29

Expert Comment

by:becraig
ID: 38865893
Do you get any events in the system log when this occurs  ?
0
 

Author Comment

by:-Darvin-
ID: 38868397
I tried this again.  Manually changing the time and the behavior has changed.  As I said previously.  I would change the time, run the w32tm command it would change to the 'right' time and then forward.  Now, when I change the time I don't even get a chance to run the command before it puts itself back.  It's nearly instant.

System log shows this.

The system time has changed to ¿2013¿-¿02¿-¿08T16:00:00.000000000Z from ¿2013¿-¿02¿-¿08T16:09:30.964103500Z.

The system time has changed to ¿2013¿-¿02¿-¿08T16:00:00.000000000Z from ¿2013¿-¿02¿-¿08T16:00:00.000000000Z.

The system time has changed to ¿2013¿-¿02¿-¿08T16:09:34.765000000Z from ¿2013¿-¿02¿-¿08T16:00:03.796496900Z.

Very strange behavior.
0
 

Accepted Solution

by:
-Darvin- earned 0 total points
ID: 38914979
I found the solution.  Something I neglected to mention was that the domain controller is a hyper-v guest.  It works so well I often forget it's virtual.  The problem is that hyper-v has it's own time keeping mechanism that it passes along to the guests.  By disabling this feature in the integrated services area hyper-v stopped changing the time.  I don't know where it was getting the bad time from as the hyper-v server was taking time from the domain controller.  Perhaps it was in bios of the hyper-v server.  

In either case that solved the problem.
0
 

Author Closing Comment

by:-Darvin-
ID: 38929145
This is the solution.
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

INTRODUCTION The purpose of this document is to demonstrate the Installation and configuration of the Data Protection Manager product. Note that this demonstration was prepared on the basis of Windows OS is 2008 R2 and DPM 2010. DATA PROTECTI…
While rebooting windows server 2003 server , it's showing "active directory rebuilding indices please wait" at startup. It took a little while for this process to complete and once we logged on not all the services were started so another reboot is …
This tutorial will give a an overview on how to deploy remote agents in Backup Exec 2012 to new servers. Click on the Backup Exec button in the upper left corner. From here, are global settings for the application such as connecting to a remote Back…
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…

778 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question