You can analyze the SolutionPack for Network Configuration Manager logs in to troubleshoot a broken connection.
Procedure
Log in to the M&R server.
Go to the /opt/APG/Collecting/Collector-Manager/<ncm_instance_name>/logs directory to view the log files.
For Linux, navigate to your emc-ncm instance and check the log files,
/opt/APG/Collecting/Collector-Manager/<emc-ncm-instance-name>/logs/collecting-0-0.log