Network performance monitoring

NAM enables network performance monitoring based on the analysis of NetFlow data and on passive monitoring of network traffic using network probes.

Choice of data sources and reporting engines

The analysis choices available to you depend on the product licenses you purchase.

Data source options

NAM Probes are used as primary network probes, combining the functionality of passive traffic listeners and NetFlow collectors.

Reporting engine options

The NAM Server is the recommended reporting engine for data supplied by NAM Probes and Network Monitoring Probes, and is the recommended reporting engine for all new deployments.

If you are an existing Network Monitoring user, you can continue to use the Interactive Viewer as your reporting engine for data supplied by Network Monitoring Probes.

NetFlow options and features

  • NetFlow version 5
  • NetFlow version 9 and IPFIX with elements of Flexible NetFlow: Ability to configure the NetFlow collector to retrieve and interpret client RTT information from a specified field. This feature has been tested for Riverbed and Cisco network devices.
  • WAN optimization monitoring: ability to specify WAN interface names, to facilitate NetFlow monitoring of WAN-optimized traffic.

Network performance monitoring options

NAM network performance monitoring covers layers 3 and up of the OSI model: it monitors the IP protocol and the layers above IP (transport, session and application); layer 2 and below are not analyzed.

Data source configuration

For NetFlow-based analysis to function, you need to configure NAM Probes to perform NetFlow collection and SNMP polling. You should also configure specific NetFlow-enabled devices to generate and send FlowSets to the specific NAM Probes.

For passive traffic monitoring analysis, you need to configure NAM Probe so that the network traffic of interest is monitored by the appropriate traffic analyzers. To do this, you can configure custom software services in the NAM Console. An alternative option is to use application recognition engines built into the NAM Probe and Network Monitoring Probe. To get maximum performance of traffic analysis in typical network performance monitoring use cases, you should use general traffic analyzers as opposed to analyzers for in-depth transactional or payload analysis.

Reporting for network performance monitoring

An extensive set of network performance monitoring reports has been provided. You can also design your own reports or customize some of the reports that have been provided. For more information, see Network Analysis.