Subscriber services: Flat-file accounting

You can collect accounting statistics from the Packet Forwarding Engine to be reported in an XML flat file. Flat file accounting is typically used to record accounting statistics on logical interfaces for Extensible Subscriber Services Manager (ESSM) business subscribers. You can also use flat-file accounting to collect and archive accounting statistics for wholesaler and retailer subscriber activity in a Layer 2 wholesale environment by applying it to a core-facing physical interface.