Overview

Using a Juniper Networks routing platform, a selection of Physical Interface Cards (PICs) for M-series and T-series routing platforms—including the Monitoring Services PIC, Monitoring Services II PIC, Adaptive Services PIC, and MultiServices PICs—and other networking hardware, you can monitor traffic flow and export the monitored traffic. Monitoring traffic allows you to do the following:

• Gather and export detailed information about traffic flows between source and destination nodes in your network.
• Sample all incoming traffic on the monitoring interface and present the data in record format.
• Encrypt or tunnel outgoing records, intercepted traffic, or both.
• Direct filtered traffic to different packet analyzers and present the data in its original format.
• Intercept unwanted traffic, discard it, and perform accounting on the discarded packets.

There are two main types of flow monitoring:

• Passive Flow Monitoring
• Active Flow Monitoring

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