Heavy network traffic occurs during an LDAP query by the DNS server in Windows Server 2012 R2 and Windows Server 2012

Symptoms

Consider the following scenario:
In this scenario, heavy network traffic may be observed from the DNS server to the domain naming master server because of a large number of Lightweight Directory Access Protocol (LDAP) queries. Additionally, you may find that the LDAP query is actually for the DNS Settings object that contains the msDNS-KeymasterZones attribute.

Cause

This problem occurs because the new DNSSEC feature in Windows Server 2012 tries to query the Domain Naming Master for the msDNS-KeymasterZones attribute every minute for all AD integrated zones on the DNS server.

Resolution

To resolve this issue in Windows Server 2012 R2, install update 2919355.
To resolve this issue in Windows Server 2012, install the hotfix that is described in this article.

Update information for Windows Server 2012 R2

For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014

Hotfix information for Windows Server 2012

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must have Windows Server 2012 installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

File information

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Additional file information

References

Learn about the terminology that Microsoft uses to describe software updates.
Properties

Article ID: 2910718 - Last Review: Apr 10, 2014 - Revision: 1

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