New Training: Configure and Verify NetFlow and Flexible NetFlow
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New Training: Configure and Verify NetFlow and Flexible NetFlow

In this 5-video skill, CBT Nuggets trainer Jeremy Cioara teaches you how to configure and troubleshoot common VLAN trunking issues. Learn core trunking concepts, and gain hands-on skills as you configure and troubleshooting trunking in a lab environment. Watch this new Cisco training.

Watch the full course: Cisco CCNP Enterprise Core

This training includes:

  • 5 videos
  • 48 minutes of training

You’ll learn these topics in this skill:

  • Introduction – Configure and verify NetFlow and Flexible NetFlow
  • Defining Netflow
  • Netflow Configuration
  • Analyzing Netflow Data
  • Understanding and Configuring Flexible Netflow

How Do You Analyze Network Congestion Issues?

As businesses grow, network deployment often becomes more complicated. Existing business networks may not be able to handle capacity, and these issues can be difficult to diagnose. One of the tools network administrators can use to find network congestion issues is NetFlow.

NetFlow is a feature built into Cisco routers. It was introduced in 1996. NetFlow is a logging tool that can capture network traffic data as packets both enter and exit an interface.

NetFlow consists of three main components:

  • Flow Exporter
  • Flow Collector
  • Analysis Application

Each component serves a specific purpose. The Flow Exporter aggregates data into traffic flows and exports those records. The Flow Collector is like a bridge for the Analysis Application. It stores and pre-processes those data flows for the Analysis Application. Finally, the Analysis Application represents that data in a visual way to demonstrate things like intrusion detection and traffic profiling.

By using NetFlow, network administrators can quickly find issues like network congestion and possible intrusion issues. Before configuring NetFlow, though, network admins will need to understand how NetFlow works and what configuration options it has to mold it to their business use case.

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