The cflowd feature allows service providers to collect IP flow data within the context of a VPRN. This data can used to monitor types and general proportion of traffic traversing an VPRN context. This data can also be shared with the VPN customer to see the types of traffic traversing the VPN and use it for traffic engineering.
This feature should not be used for billing purposes. Existing queue counters are designed for this purpose and provide very accurate per bit accounting records.