What is NetFlow Analyzer?

What is NetFlow Analyzer?

In today’s interconnected world, network administrators face the daunting task of managing and securing complex networks. To effectively monitor network traffic and optimize performance, they require comprehensive insights into the data flows within their infrastructure.

NetFlow Analyzer is an analytics tool that monitors network traffic flow. It leverages the ability of flow technologies to offer visibility in real time. This lets you see your bandwidth performance as it changes, so you have a good idea of the traffic level through your network at that time.

It’s essential to understand why that matters because data can seem meaningless when there isn’t a good reason to view or collect it. With network monitoring, you can spot problems with areas of the network or times when too much traffic might be jamming things up and slowing things down. Correcting those issues could mean better traffic flow, which is vital to keeping your network operating successfully.

Understanding the importance of network traffic analysis

Many people mistakenly think that the level and type of network traffic don’t matter much as long as everything can flow properly. If there aren’t backups or slowdowns, everything must be working the right way.

This isn’t really accurate, though. Instead, the network could be just seconds away from disaster. A small bump in traffic during those times, for any reason, may be enough to shut down the network and cause serious problems.

Analyzing network traffic makes it easier to monitor the bandwidth on your network and whether it’s enough to handle additional traffic if required. Measuring packet loss and determining throughput are also valuable reasons to use NetFlow Analyzer, and you can also expect to understand any traffic congestion issues at specific levels of the interface.

Importance of network traffic analysis

NetFlow Analysis plays a crucial role in enhancing network security. By monitoring traffic flows, administrators can detect and investigate suspicious activities, such as unauthorized access attempts, malware infections, or DDoS attacks. Traffic analyzers provide valuable insights for incident response and forensic investigations.

Taking preemptive measures by monitoring your network traffic means you’ll catch many potential problems before they start. Additionally, you’ll find small issues and get them corrected before they can become larger issues that could even take down your network for a period of time.

The role of traffic analysis in network management

NetFlow Analyzers give administrators deep visibility into network traffic, enabling them to monitor and understand the flow of data across the infrastructure. This visibility is crucial for capacity planning, troubleshooting network issues, and identifying potential security threats.

How does NetFlow Analyzer work?

NetFlow Analyzer starts with flow data generation. Network devices configured to support NetFlow export information about each network flow traversing through them. A flow represents a unidirectional stream of packets with similar characteristics, such as source and destination IP addresses, ports, protocol type, and other relevant details. These flows are continuously generated and exported by the network devices.

Then NetFlow Analyzer collects the exported flow data from the network devices. It typically uses one of the standard protocols for flow collection, such as NetFlow (Cisco’s proprietary protocol), sFlow, J-Flow, IPFIX, or NetStream. The flow data is gathered from multiple network devices and aggregated for analysis.

After collection comes data storage. The collected flow data is stored in a database or file storage system for further analysis. NetFlow Analyzer may use a relational database management system (such as MySQL or PostgreSQL) or a NoSQL database (such as Elasticsearch) to store and manage the flow data.

A flow analysis is conducted on the data, and stored flow data is processed and analyzed to extract useful information. NetFlow Analyzer applies various algorithms and techniques to identify patterns, trends, and anomalies in the network traffic. It can calculate metrics like bandwidth utilization, top talkers, top applications, protocols, and identify sources of congestion or network performance issues.

The analyzed data is then presented in the form of reports and visualizations, which provide insights into the network traffic behavior. NetFlow Analyzer offers a web-based interface where users can view pre-built reports or customize their own. The reports may include information like traffic volume, application usage, traffic patterns, IP address groups, and more. Visualizations, such as graphs, charts, and tables, help people understand the network traffic visually.

Using a platform like LogicMonitor, analyzed data can also be used to alert users, either using static or dynamic triggers on the defined thresholds on collected Netflow data. 

By leveraging flow data analysis, NetFlow Analyzer enables network administrators to monitor and optimize network performance, detect and troubleshoot network issues, plan network capacity, and ensure the efficient utilization of network resources.

Implementing NetFlow Analyzer

NetFlow Analyzer typically integrates with network devices and collects NetFlow data, which is then processed and presented in intuitive dashboards and reports. Administrators can visualize network traffic patterns, drill down into specific flows, set up alerts for anomalies, and generate comprehensive reports for capacity planning, troubleshooting, and security analysis.

Benefits of using NetFlow Analyzer

Capacity planning

By analyzing NetFlow data, administrators can identify underutilized or overutilized network resources. This information allows them to allocate bandwidth and network capacity more efficiently, ensuring optimal performance and cost-effective resource utilization.


With the ability to monitor traffic patterns, NetFlow Analyzer helps administrators identify bottlenecks and optimize network configurations. By proactively addressing performance issues, organizations can provide a seamless user experience, minimizing downtime and latency.


NetFlow Analyzer acts as a valuable security tool by monitoring network traffic for suspicious behavior and detecting potential security breaches. Administrators can quickly respond to security incidents, isolate compromised systems, and implement appropriate countermeasures to safeguard the network.

Cost reduction

NetFlow Analyzer helps companies save money by creating an efficient network. Employees can get more done, and their higher level of efficiency provides companies with lower overall costs.


Using traffic analyzers, like NetFlow Analyzer provides a powerful solution for gaining deep insights into your network’s performance and security. By harnessing real-time data and comprehensive analytics, you can effectively monitor and optimize your network’s health and capabilities.

However, it’s important to remember that network monitoring is an ongoing process. As your organization grows and your network evolves, you need a scalable and robust monitoring platform that can adapt to your changing needs. This is where LogicMonitor comes into play.

LogicMonitor offers a comprehensive suite of network monitoring tools, including NetFlow analysis, to help you achieve unparalleled visibility and control over your network infrastructure. With LogicMonitor, you can proactively identify and resolve network issues, optimize resource allocation, and ensure the smooth operation of your critical business applications.

Don’t settle for reactive network management. Take the proactive approach with LogicMonitor and empower your IT team to drive operational efficiency and deliver superior monitoring experiences.