Netflow analysis best pratice and tools ?

Hi, We plan to set up netflow analysis in our backbone. It's hoped to be able to track communication demand inside our AS as well as our AS and other ASes. It also expected to be able to support route optimization and to detect abnormal network behavior . And, report generation is needed too. Is there any best pratice or recommendation on how to employ netflow collecting in ISP backbone? Is there any software or products covering all above ? thanks Joe __________________________________________________ Do You Yahoo!? Log on to Messenger with your mobile phone! http://sg.messenger.yahoo.com