225Configuring IPv6 NetStreamOverviewIPv6 NetStream is an accounting technology that provides statistics on a per-flow basis. An IPv6 flow isdefined by the following 8-tuple elements:• Destination IPv6 address.• Source IPv6 address.• Destination port number.• Source port number.• Protocol number.• Traffic class.• Flow label.• Input or output interface.IPv6 NetStream architectureA typical IPv6 NetStream system includes the following elements:• NetStream data exporter—A device configured with IPv6 NetStream. The NDE provides thefollowing functions:{ Classifies traffic flows by using the 8-tuple elements.{ Collects data from the classified flows.{ Aggregates and exports the data to the NSC.• NetStream collector—A program running in a Unix or Windows operating system. The NSC parsesthe packets received from the NDEs, and saves the data to its database.• NetStream data analyzer—A network traffic analyzing tool. Based on the data in NSC, the NDAgenerates reports for traffic billing, network planning, and attack detection and monitoring. TheNDA can collect data from multiple NSCs. Typically, the NDA features a Web-based system foreasy operation.NSC and NDA are typically integrated into a NetStream server.H3C network devices act as NDEs in the IPv6 NetStream system. This document focuses on NDEconfiguration.
