I have 3 different sites.

Site1:  2 Win 2008r2 DC's and 1 Win2003 DC that is soon to be de-comissioned
Site2:  1 Win 2008r2 DC
Site3:  1 Win 2008r2 DC

My issue is with the DC in site3.  I keep getting the following error (EventID 1311) followed by EventID 1865 and 1925.  Everything seems to look good and work good but I have some type of problem that is causing this error.  I get this error every 15 minutes.  Someone help me determine what my problem is.  thanks

The Knowledge Consistency Checker (KCC) has detected problems with the following directory partition.
 
Directory partition:
CN=Configuration,DC=corp,DC=company,DC=com
 
There is insufficient site connectivity information for the KCC to create a spanning tree replication topology. Or, one or more directory servers with this directory partition are unable to replicate the directory partition information. This is probably due to inaccessible directory servers.
 
User Action
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 directory service that contains the directory partition in this site from a directory service that contains the same directory partition in another site.

Hi,

>>I keep getting the following error (EventID 1311) followed by EventID 1865 and 1925.  Everything seems to look good and work good but I have some type of problem that is causing this error.  I get this error every 15 minutes

Before going further, please use the portqry tool to troubleshoot the connectivity issues to the Bridgehead servers of the sites that are listed in Event 1865. If the ports are blocked by the firewall, configure the firewall to open the ports.

Regarding troubleshooting Event ID 1865, 1925, and 1311, the following articles can be referred to as reference.

AD replication is not working with event 1865 logged

https://support.microsoft.com/en-us/kb/944351

Event ID 1865 KCC Replication Path Computation

https://technet.microsoft.com/en-us/library/cc756648(v=ws.10).aspx

Event ID 1925: Attempt to establish a replication link failed due to connectivity problem

https://technet.microsoft.com/en-us/library/cc949135(v=ws.10).aspx

Event ID 1311: Replication configuration does not reflect the physical network

https://technet.microsoft.com/en-us/library/cc740252(v=ws.10).aspx

Best regards,
Frank Shen

                    

You can also check below blog.

http://blogs.technet.com/b/markmoro/archive/2011/08/05/you-are-not-smarter-than-the-kcc.aspx

http://blogs.technet.com/b/askds/archive/2008/10/31/troubleshooting-kcc-event-log-errors.aspx

• Edited by Purvesh Adua 2 hours 18 minutes ago