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• Version 9: The most flexible format. It allows users to define templates with different statistics fields.
The template-based feature provides support of different statistics information, such as BGP next hop
and MPLS information.
Introduction to NetStream sampling and filtering
NetStream sampling
NetStream sampling basically reflects the network traffic information by collecting statistics on fewer
packets. The reduced statistics to be transferred also bring down the impact on the device performance.
For more information about sampling, see “Configuring a sampler.”
NetStream filtering
NetStream filtering is implemented by referencing an ACL or applying a QoS policy to NetStream.
NetStream filtering enables NetStream module to collect statistics on packets permitted by the filtering
criteria. The filtering allows for selecting specific data flows for statistics purpose. The NetStream filtering
by QoS policy is flexible and suitable for various applications.
NetStream configuration task list
Before you configure NetStream, determine the following proper configurations as needed.
• Make sure on which device you want to enable NetStream.
• If multiple service flows are passing the NDE, use an ACL or QoS policy to select the target data.
• If enormous traffic flows are on the network, configure NetStream sampling.
• Decide which export format is used for NetStream data export.
• Configure the timer for NetStream flow aging.
• To reduce the bandwidth consumption of NetStream data export, configure NetStream aggregation.
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