Error NTDS KCC

Tengo este problema reflejado en el event viewer pero no se a que se
refiere
exactamente

The Knowledge Consistency Checker (KCC) has detected problems with the
following directory partition.

Directory partition:
DC=spporto,DC=spportomx,DC=spportocity,DC=com

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.

For more information, see Help and Support Center at