Dcdiag Incorrectly Reports an Unsuccessful Connectivity Test for Some IP Addresses

View products that this article applies to.

This article was previously published under Q313108

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SYMPTOMS

If you run the Dcdiag tool against a domain controller, Dcdiag may report a Domain Name System (DNS) error even if the DNS entries are correct. You may receive an error report that is similar to:

Testing server: DOMAIN\SERVER

Starting test: Connectivity
* Active Directory LDAP Services Check
The host 3ca68143-01f2-4ccc-a946-daac0673e3af._msdcs.domain.com could not be resolved to a valid IP address.
Check the DNS server, DHCP, server name, etc
......................... SERVER failed test Connectivity

You may also receive the following error message:

* Active Directory LDAP Services Check
The host ') could not be resolved to a valid IP address.

The Dcdiag tool is included with the Windows 2000 Support Tools package.

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CAUSE

This problem can occur if all four octets of the domain controller's IP address are above 99.

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RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/EN-US/ ) How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:

   Date         Time   Version        Size     File name
   ------------------------------------------------------
   11-Jan-2002  22:36  5.0.2195.4827  217,872  Dcdiag.exe

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

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MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 (http://support.microsoft.com/kb/265173/EN-US/ ) The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 (http://support.microsoft.com/kb/296861/EN-US/ ) Use QChain.exe to Install Multiple Hotfixes with One Reboot

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