DHCP Failover:The server detected that it is out of time synchronization with partner server:

Question

_{Tuesday, March 13, 2018 1:26 PM}

Morning guys,

I am trying to find a solution for a DHCP servers of mine that is showing several error messages in the event viewer like these:

The server detected that it is out of time synchronization with partner server: REMOTESERVER-HOSTNAME for failover relationship: LOCALSERVER-REMOTESERVER.  The time is out of sync by: 3602 seconds .

After a few seconds, the event viewer shows that the error is fixed:

Server has established contact with failover partner server REMOTE-SERVER for relationship LOCALSERVER-REMOTESERVER

I have tons of DHCP FAILOVER realtions with the REMOTESERVER. More than 20 DHCP Servers are actually working fine and this is the only partner server that is sending out these error messages.

The LOCALSERVER is also a DC and there's no error in the time configuration or the time zone.

Does this ring any bells to you guys ? Thanks

Regards

All replies (10)

_{Wednesday, March 14, 2018 5:09 AM}

Hi Selva,

Thanks for your question.

This issue happened with event ID 20253 when the DHCP server detected that it is out of time synchronization with its partner server.

In DHCP failover, whenever one of the server responds with an ACK to a client request, the same is updated in the database of the DHCP server with a timestamp and is sent to the partner for synchronization. This timestamp is at granularity of a second. If the partner server receives two synchronization updates from the other DHCP server with the same timestamp, it will reject the second request.

If the second request from the  client is a release request then this causes the failover servers to go out of sync as the partner server will reject the synchronization update but the first server (which received the client request) will apply the update to its database.

Please try the following article and update the corresponding hotfixes on DHCP server.

https://blogs.technet.microsoft.com/teamdhcp/2014/02/24/dhcp-failover-fixes-in-kb-2919393-for-windows-server-2012-and-kb-2919355-for-windows-server-2012-r2/

Update for Windows Server 2012 (KB2919393)

https://www.microsoft.com/en-us/download/details.aspx?id=41792

Windows Server 2012 R2 Update (KB2919355)

https://www.microsoft.com/en-us/download/details.aspx?id=42334

Hope above information helpful.

Highly appreciate your effort and time. If you have any questions and concerns, please feel free to let me know.

Wish you have a nice day!

Best regards, 

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Friday, March 16, 2018 9:33 AM}

Hi Selva,

How are things going on? Was your issue resolved?

Please let us know if you would like further assistance.

Wish you have a nice weekend!

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Monday, March 19, 2018 6:54 AM}

Hi Michael,

I was busy on other things and I didn't have time to look at this issue. I have noticed that other DHCP servers are affected from the same issues^.

I have checked the servers and the hotfix has been applied on April 2014

Thanks for you help

Regards

_{Monday, March 19, 2018 9:57 AM}

Hi Selva,

Thanks for your update.

I will follow up this case and stand by with you. If you have any updates during this process, please feel free to let me know.

Thank you very much for sharing here. Highly appreciate your successive effort and time.

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Friday, March 23, 2018 9:54 AM}

Hi Selva,

How are things going on? Was your issue resolved?

Please let us know if you would like further assistance.

Wish you have a nice weekend!

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Monday, March 26, 2018 9:41 AM}

Hi Selva,

How are things going on? Was your issue resolved?

Please let us know if you would like further assistance.

If you resolved it using our solution, please "mark it as answer" to help other community members find the helpful reply quickly.

Wish you have a nice day!

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Wednesday, March 28, 2018 9:17 AM}

Hi Selva,

How are things going on? Was your issue resolved?

Please let us know if you would like further assistance.

Wish you have a nice day!

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Tuesday, April 3, 2018 8:46 AM}

Hi, no news yet. I will let you know as soon as I can

Thanks

_{Friday, April 6, 2018 10:47 AM}

Hi Selva,

Thanks for your update.

I will follow this thread and stand by with you. If you have any updates during this process, please feel free to let me know.

Highly appreciate your effort and time.

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]

_{Thursday, May 10, 2018 11:47 AM}

Hi Selva,

How are things going on? Was your issue resolved?

Please let us know if you would like further assistance.

Best regards,

Michael

Please remember to mark the replies as an answers if they help.
If you have feedback for TechNet Subscriber Support, contact [email protected]