Event ID 1664 — KCC Replication Path Computation

Updated: November 25, 2009

Applies To: Windows Server 2008 R2

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The Knowledge Consistency Checker (KCC) is a component of Active Directory Domain Services (AD DS) that is responsible for generating the replication topology between domain controllers. Generating an efficient and fault-tolerant replication topology is an integral part of achieving data consistency between domain controllers.

Event Details

Product: Windows Operating System
ID: 1664
Source: Microsoft-Windows-ActiveDirectory_DomainService
Version: 6.0
Symbolic Name: DIRLOG_KCC_CONNECTION_OBJ_TRANSLATION_DISABLED
Message: The Connection object translation task in the Knowledge Consistency Checker (KCC) is disabled. This configuration is for internal testing purposes only.

User Action
To enable the translation task, use the Repadmin command-line tool and run the following command-line task.

repadmin /options "server" -disable_ntdsconn_xlate

Resolve

Enable KCC translation and inbound/outbound replication

Configure the domain controller that is reporting this message to enable Knowledge Consistency Checker (KCC) translation as well as inbound and outbound replication.

To perform this procedure, you must have membership in Domain Admins, or you must have been delegated the appropriate authority.

To enable KCC translation and inbound/outbound replication:

  1. Open a command prompt as an administrator. To open a command prompt as an administrator, click Start. In Start Search, type Command Prompt. At the top of the Start menu, right-click Command Prompt, and then click Run as administrator. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  2. Type repadmin /options localhost -disable_inbound_repl -disable_outbound_repl -disable_ntdsconn_xlate, and then press ENTER. The command configures the specified options and reports the status of the the component.

Note: In the repadmin /options syntax, the minus sign (-) turns off an option; the plus sign (+) turns on an option.

Verify

Perform the following procedure on the domain controller on which you want to verify that the Knowledge Consistency Checker (KCC) is functioning.

To perform this procedure, you must have membership in Domain Admins, or you must have been delegated the appropriate authority.

To verify that the KCC is computing replication paths:

  1. Open a command prompt as an administrator. To open a command prompt as an administrator, click Start. In Start Search, type Command Prompt. At the top of the Start menu, right-click Command Prompt, and then click Run as administrator. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
  2. Run the command repadmin /kcc. This command starts KCC translation of domain controllers, to which the local domain controller replicates.

Check Event Viewer to see if there are any failure messages that are related to the KCC. If there are no error events that are related to the KCC, it is functioning properly. If there are error events, use the additional information in them to resolve the issue.

Related Management Information

KCC Replication Path Computation

Active Directory

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