The Knowledge Consistency Checker (KCC) has detected problems with the following directory partition. Directory partition:%1 There is insufficient site connectivity information in Active Directory Sites and Services for the KCC to create a spanning tree replication topology. Or, one or more domain controllers with this directory partition are unable to replicate the directory partition information. This is probably due to inaccessible domain controllers. User Action Use Active Directory Sites and Services to perform one of the following actions: – Publish sufficient site connectivity information so that the KCC can determine a route by which this directory partition can reach this site. This is the preferred option. – Add a Connection object to a domain controller that contains the directory partition in this site from a domain controller that contains the same directory partition in another site. If neither of the Active Directory Sites and Services tasks correct this condition, see previous events logged by the KCC that identify the inaccessible domain controllers.

Details
Product: Windows Operating System
Event ID: 1311
Source: NTDS KCC
Version: 5.2
Symbolic Name: DIRLOG_KCC_NO_SPANNING_TREE
Message: The Knowledge Consistency Checker (KCC) has detected problems with the following directory partition.

Directory partition:%1

There is insufficient site connectivity information in Active Directory Sites and Services for the KCC to create a spanning tree replication topology. Or, one or more domain controllers with this directory partition are unable to replicate the directory partition information. This is probably due to inaccessible domain controllers.

User Action
Use Active Directory Sites and Services to perform one of the following actions:
– Publish sufficient site connectivity information so that the KCC can determine a route by which this directory partition can reach this site. This is the preferred option.
– Add a Connection object to a domain controller that contains the directory partition in this site from a domain controller that contains the same directory partition in another site.

If neither of the Active Directory Sites and Services tasks correct this condition, see previous events logged by the KCC that identify the inaccessible domain controllers.

   
Explanation

The Knowledge Consistency Checker (KCC) could not connect to all of the domain controllers hosting this partition. The topology is disconnected.

Probable causes include:

  • The set of site links is incomplete. The site links must span all the sites within the domain controllers. In addition, a site within the domain must be connected by site links to all the other sites within the domain. If site link bridging is disabled, a copy of the domain must exist in each site along the path.
  • One or more domain controllers cannot be contacted.
  • All eligible bridgeheads for a domain are down on the site.
   
User Action

If the set of site links is incomplete, follow this procedure:

  1. Search Event Viewer for NTDS KCC 1865. This event indicates which site links are causing the problem.
  2. Using the Active Directory Sites and Services snap–in, ensure that the site links and site link bridges are correctly configured. All the sites containing domain controllers that are hosting a particular partition should be connected, either directly or transitively.

If the site links are correctly configured, the problem might be communication related. Verify that all eligible bridgeheads for a given domain are running.

For more information about designing a site topology, see the Windows Server 2003 Deployment Guide.

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