I have already tried this but I'm not quiet familiar with SQL so it's kind of hard for me. I also found some useful information here: http://alstechcorner.blogspot.com/2014/01/how-to-create-interface-usage-report-on.html
But still, I can't find a way to say in SQL: "I want to see the traffic from this interface to this interface". I will continue to search and let you inform but if someone has already this kind of report it would be much appreciated to share.
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