The scheduled development: [Документация VAS Experts]
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    en:statistics_description [2015/04/13 15:08] – translator1en:statistics_description [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
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    -SCAT DPI exports statistics by protocols and by directions in  [[http://ru.wikipedia.org/wiki/Netflow|netflow5]] format. This format is supported by most of free and commercial tools to collect and analyse stat data. For your convenience, we deliver [[nfsen|free SW to view and analyse statistics]] - slightly adopted version of [[http://nfsen.sourceforge.net|nfsen]], with extensions to build reports by protocols and independent systems' names. 
      
    -Transmission of the DPI information by netflow5 has some peculiarities: 
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    -  - The information on the used protocol is defined in [[http://netflow.caligare.com/netflow_v5.htm|dstport]] field (port number). [[http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml|The port number specified by IANA association for the protocol]] is used when available. However, for [[port_proto|the protocols with floating number (torrents, skype and so on)]] the special number in the upper range (49152-65534) is reserved. This range is specified by IANA for private ports. The port number 65535 is assigned for protocols that failed to be detected. 
    -  - The statistics by protocols is transmitted in aggregated format. DPI accumulates statistics by the protocol by combining an information from various sessions. Then DPI sends this information to a collector within the specified schedule. This method allows dramatical reduction of amount of transmitted data. 
    -  - Direction information is defined by  [[http://netflow.caligare.com/netflow_v5.htm|dst_as]] field (independent system's number)     
    -  - The statistics by directions is transmitted in aggregated format. DPI accumulates statistics by the direction (AS number) by combining an information from various sessions. Then DPI sends this information to a collector within the specified schedule. This method allows dramatical reduction of amount of transmitted data. 
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    -==The scheduled development:==  
    -IPFIX support. 
    - 
    -~~DISCUSSION|Please help us to improve our documentation. Let us know if you found an error or something is unclear.~~