NetFlow has two components that must be configured: NetFlow Data Capture and NetFlow Data Export. NetFlow Data Capture captures the traffic statistics. NetFlow Data Export exports the statistical data to a NetFlow collector, such as Cisco DNA Center or Cisco Prime Infrastructure.
Flexible NetFlow was created to aid in more complex traffic analysis configuration than is possible with traditional NetFlow.
Flexible NetFlow Components
1. Flow Records: Combination of key and non-key fields. There are predefined and user-defined records.
2. Flow Monitors: Applied to the interface to perform network traffic monitoring.
3. Flow Exporters: Exports NetFlow Version 9 data from the Flow Monitor cache to a remote host or NetFlow collector.
4. Flow Samplers: Samples partial NetFlow data rather than analyzing all NetFlow data. show ip flow interface: shows the interfaces that are configured for NetFlow.
Given below are the basic steps involved in configuring ICMP echo-based IP SLA, assuming that you are already in appropriate configuration mode:
1. Begins configuration for an IP SLAs operation and enters IP SLA configuration mode Switch(config)# ip sla 10
2. Defines an ICMP Echo operation and enters IP SLA ICMP Echo configuration mode Switch(config-ip-sla)# icmp-echo 172.18.135.123
3. Sets the rate at which a specified IP SLAs operation repeats Switch(config-ip-sla-echo)# frequency 300
4. Exits to privileged EXEC mode - Exits to privileged EXEC mode
Cisco Digital Network Architecture (DNA) offers centralized, intuitive management that makes it fast and easy to design, provision, and apply policies across your network environment. The Cisco DNA Center GUI provides end-to-end network visibility and uses network insights to optimize network performance and deliver the best user and application experience.