3com 8807 User Guide

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Netstream provides the packet statistics function. It can classify the stream 
information according to the destination IP address, destination port number, 
source IP address, source port number, protocol number and ToS of the packet, 
and performs independent statistics for different stream information.

Figure 168 describes the basic collection and analysis procedure of Netstream 
data.

Figure 168   The basic collection and analysis procedure of Netstream data

The collection and analysis procedure of Netstream data is as follows:

1 The switch regularly sends the collected verbose stream information to the 

network data collector (NDC);

2 The NDC analyses the data and the analysis result is used for accounting and 

network planning.

When the Netstream feature is enabled, the stream information is first saved to 
the Netstream cache. After a certain amount of time, the stream information is 
sent to the NDC in the format of version 5, version 8, or version 9 UDP packets.

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The aged stream information is generally sent in the form of version 5 UDP 
packets;

Network 

Data 

Collector