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Using Incorrect DNS Forwarders Cause High Processor Usage

Article ID: 177414

Article Last Modified on 10/31/2006

APPLIES TO

This article was previously published under Q177414

SYMPTOMS

Your Microsoft Windows NT Domain Name Service (DNS) server may experience times when the processor usage climbs as high as 90 percent. Your computer may also appear extremely unresponsive while the processor usage remains at this high level.

CAUSE

Your DNS server has its own IP address configured as a forwarder.

RESOLUTION

To resolve this issue, use the following steps:

  1. From DNS Manager, click your DNS server in the Server List.
  2. Click Properties on the DNS menu.
  3. Click the Forwarders tab, select your DNS server's IP address, and click Remove.
  4. Click OK.

MORE INFORMATION

When you set up Microsoft DNS server, you may desire to use Forwarders. When configuring this setting, it is not necessary to include your own IP address in the list of forwarders. This setting is used as the next place to look when the DNS server does not have the name or address in its cache. By including your own IP address in the forwarders setting, you are creating a resolver loop where the computer keeps trying to forward queries to itself.

Keywords: kbnetwork kbprb KB177414


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