The link is full—but why?
SNMP utilization shows a busy interface, but not which endpoints, ports, protocols, or conversations are filling it.
Network traffic analysis
The Link Is Busy. Find Out Who Is Using It—and Why.
Nagios Network Analyzer turns NetFlow, sFlow, jFlow, and IPFIX into answers: which endpoints are talking, which ports and protocols are involved, and what is consuming the bandwidth.
Why teams start looking for better traffic visibility
Interface utilization can tell you something is wrong. The harder part is explaining what happened before the ticket, call, or outage becomes the only evidence.
The spike is already gone
Intermittent congestion is difficult to diagnose when the traffic has disappeared by the time someone starts investigating.
You need history, not just a live graph
Capacity planning, recurring incidents, and post-event analysis depend on retaining the flow data that actually matters.
Troubleshooting spans too many tools
Flow records, path data, packet capture, discovery, and security context are more useful when an investigation can stay connected.
Flow-level visibility
Turn a busy interface into an answer
Nagios Network Analyzer collects NetFlow, sFlow, jFlow, and IPFIX and breaks traffic down by source, destination, port, protocol, flows, packets, and bandwidth.
Saved queries, Traffic Profiles, thresholds, and retention controls help you investigate what happened and keep the history that matters.
- Identify top talkers and the conversations consuming bandwidth
- Save queries and retain selected flow history for recurring investigations
- Alert on bandwidth or query thresholds instead of waiting for a user report
- Send passive results into Nagios XI or Core when network traffic should affect the wider monitoring workflow
One license for the traffic-analysis workload
Nagios Network Analyzer uses a single perpetual license with no user limit and no per-interface or per-flow software charge.
$4,995
Current public perpetual license price; first year of Maintenance & Support is included.
No user limit
Give the network team access without adding software cost per user.
No per-interface fees
Monitor supported flow sources without licensing each interface separately.
Go beyond flow when needed
Start with flow. Go deeper when needed.
Flow data answers who, what, and how much. Network Analyzer 2026 also provides integrated workflows for scheduled traceroutes, Wireshark packet capture, Suricata signature-based detection, and Nmap discovery/port scanning when an investigation needs more context.
MCS can help configure sources, queries, Traffic Profiles, thresholds, retention, and XI integration so the platform becomes part of day-to-day troubleshooting instead of another collector no one checks.
Need to explain what is happening on the network?
Start with the network questions you need answered
Tell us which devices can export flow data, where bandwidth or performance problems occur, and what your team needs to be able to prove after the event.
- NetFlow / sFlow / jFlow / IPFIX source planning
- Bandwidth, top-talker, and recurring-incident requirements
- Retention, Traffic Profiles, thresholds, and alerting
- Network Analyzer licensing and Nagios XI integration
Review my network traffic needs
You do not need a finished flow-monitoring design; the problem you are trying to solve is enough to start.