Hello Dinesh,
If you want to monitor the traffic of your network, netflow it's an amazing tool (if not the best one).
You will be able to see the connections built-in events, the teardowns and flow denial.
Now if you talk about configuration, about which device are you talking about:
Anyway here are some great links:
https://supportforums.cisco.com/docs/DOC-6113#NetFlow_v9_Overview
https://supportforums.cisco.com/docs/DOC-6114
http://www.paessler.com/knowledgebase/en/topic/1423-how-to-monitor-cisco-asa-firewalls-using-netflow-9-and-prtg
Remember to rate all of the helpful posts.
For this community that's as important as a thanks.
Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC