Cisco IOS Software Releases 12.2 SB

Cisco IOS Flexible NetFlow

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Cisco IOS Flexible NetFlow

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Cisco IOS Flexible NetFlow

Cisco IOS Flexible NetFlow

Cisco IOS NetFlow is a Cisco IOS technology that provides statistics on packets flowing through a router. NetFlow is the standard for acquiring IP operational data from IP networks. NetFlow provides network and security monitoring, network planning, traffic analysis, and IP accounting.

Cisco IOS Flexible NetFlow improves on original NetFlow by adding the capability to customize the traffic analysis parameters for your specific requirements. Flexible NetFlow makes it easier to create more complex configurations for traffic analysis and data export through the use of reusable configuration components.

Note Cisco IOS Flexible NetFlow was released as a single feature in Cisco IOS Release 12.4(9)T. However, Cisco IOS Flexible NetFlow is much more than just a single feature; it is an entirely new technology area that has its own command reference, configuration guide, and feature roadmap.

Configuration Information

Configuration information is included in the Cisco IOS Flexible NetFlow Configuration Guide, Cisco IOS Release 12.4T, at the following URL:

The following modules provide information about this feature:

Cisco IOS Flexible NetFlow Overview

Getting Started with Configuring Cisco IOS Flexible NetFlow

Configuring Cisco IOS Flexible NetFlow with Predefined Records

Configuring Data Export for Cisco IOS Flexible NetFlow with Flow Exporters

Customizing Cisco IOS Flexible NetFlow Flow Records and Flow Monitors for Your Network

Using Cisco IOS Flexible NetFlow Flow Sampling to Reduce the CPU Overhead of Analyzing Traffic

Command Reference Information

Command reference information is included in the Cisco IOS Flexible NetFlow Command Reference, Cisco IOS Release 12.2SB, at the following URL:

New or Modified Commands

The following commands are new or modified for Cisco IOS Flexible NetFlow:

cache (Flexible NetFlow)

clear flow exporter

clear flow monitor

clear sampler

collect counter

collect flow

collect interface

collect ipv4

collect ipv4 destination

collect ipv4 fragmentation

collect ipv4 section

collect ipv4 source

collect ipv4 total-length

collect ipv4 ttl

collect routing

collect timestamp sys-uptime

collect transport

collect transport icmp ipv4

collect transport tcp

collect transport udp

debug flow exporter

debug flow monitor

debug flow record

debug sampler

description (Flexible NetFlow)


dscp (Flexible NetFlow)


flow exporter

flow monitor

flow record

ip flow monitor

match flow

match interface (Flexible NetFlow)

match ipv4

match ipv4 destination

match ipv4 fragmentation

match ipv4 section

match ipv4 source

match routing

match transport

match transport icmp ipv4

match transport tcp

match transport udp

mode (Flexible NetFlow)

option (Flexible NetFlow)



show flow exporter

show flow interface

show flow monitor

show flow record

show sampler

source (Flexible NetFlow)

statistics packet

template data timeout

transport (Flexible NetFlow)

ttl (Flexible NetFlow)