Question 183 - 350-701 discussion

NetFlow is typically used for several key customer applications, including the following:

…B illing and accounting. NetFlow data provides fine-grained metering (for instance, flow data includes details such as IP addresses, packet and byte counts, time stamps, type of service (ToS), and application ports) for highly flexible and detailed resource utilization accounting. Service providers may use the information for billing based on time of day, bandwidth usage, application usage, quality of service, and so on. Enterprise customers may use the information for departmental charge back or cost allocation for resource utilization.

Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fnetflow/configuration/15-mt/fnf-15-mt-book/fnffnetflow.htmlIf the predefined Flexible NetFlow records are not suitable for your traffic requirements, you cancreate a userdefined (custom) record using the Flexible NetFlow collect and match commands.

Before you can create a customized record, you must decide the criteria that you are going to use for the key and nonkey fields.

Reference: https://www.cisco.com/en/US/docs/ios/fnetflow/configuration/guide/cust_fnflow_rec_mon_external_docbase_0900e4b18055d0d2_4container_external_docbase_0900e4b181b413 d9.html#wp1057997Note: Traditional NetFlow allows us to monitor from Layer 2 to 4 but Flexible NetFlow goes beyondtheselayers.