Hi, Victor:
   I am using version 1.2.0 server and java console, Network Topology is set to "Active and passive", pertinent parameters of filter are set as following picture.
   But after 2 hours, I found duplicate node were found by the server and displayed in the java console(in following picture).
   
			
			
			
				Hi!
This should be fixed already in 1.2.1. Can you try version 1.2.1?
Best regards,
Victor