Hello all, read through the charter/guidelines and I believe (hopefully correctly!) that my questions are not out of place. I am looking for advice on usage based billing solutions. I am interested both in the data collector / collection part and the billing part, and would ideally want separation between these two parts (so that the collector could be used with alternate billing systems, including in-house ones). Any suggestions on NetFlow/SFlow use? Tools (apart from Cflowd and flow-tools)? Commercial solutions? What are the general concerns with using NetFlow for billing? I understand I am asking a question that is very wide in scope, but would appreciate even generic pointers in response. Also, Juniper provides a set of alternate Network Accounting Solutions as their "response" to Flow-based accounting. Any pointers to comparison of their solution with others? Experiences? Implementation documents? Thank you, --ravi