What NetFlow, sFlow, and IPFIX Can—and Can’t—Tell You The blog “What NetFlow, sFlow, and IPFIX Can—and Can’t—Tell You” explains how flow technologies help IT teams understand traffic patterns across a network. NetFlow, sFlow, and IPFIX can show which systems are communicating, how much traffic is being exchanged, which applications and protocols are involved, and where bandwidth is being used. This makes flow data useful for identifying unusual traffic, usage patterns, and changes in communication behavior.
However, flow data does not provide a complete picture of network health. It may show that communication happened, but it cannot reliably explain issues such as packet loss, latency, congestion, interface errors, physical problems, or routing instability. As a result, users may experience slow applications, intermittent failures, or poor voice and video quality even when flow records appear normal.
The article emphasizes that flow data is valuable for visibility, but troubleshooting requires deeper context. Combining flow analysis with interface monitoring, error analysis, configuration information, and path visibility provides a more complete understanding of what is happening. The key takeaway is that NetFlow, sFlow, and IPFIX are excellent for understanding traffic behavior, but they should be combined with other monitoring data to understand network health and performance.
Source & Date: The information and date mentioned above are taken from the PathSolutions blog “What NetFlow, sFlow, and IPFIX Can—and Can’t—Tell You,” published on May 27, 2026.