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NE40E V800R010C00 Configuration Guide - System Monitor 01

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As the Internet develops rapidly, more bandwidth resources are provided for users, and at the same time a higher requirement for delicate network monitoring and management is raised. To address this issue, NetStream has been introduced. NetStream is a technique that collects highly granular per-flow traffic statistics. It classifies traffic flow statistics and calculates resource usage on networks. NetStream also helps monitor and manage networks based on the types of services and resources.

NetStream provides the following functions:

  • Accounting statistics

    NetStream provides detailed accounting statistics, including IP addresses, number of packets, number of bytes, time, type of service (ToS), and application types. Based on the collected statistics, the Internet service provider (ISP) can charge users flexibly based on resource information, such as time periods, bandwidth, applications, or QoS, and enterprises can estimate their expenses and assign costs to efficiently use resources.

  • Network planning and analysis

    NetStream provides key information for advanced network management tools to optimize the network design and plan. This helps achieve the best network performance and reliability with the lowest network operation cost.

  • Network monitoring

    NetStream monitors network traffic in real time.

  • Application monitoring and analysis

    NetStream provides detailed network application information. For example, it allows a network administrator to view the proportion of each application, such as web, the File Transfer Protocol (FTP), Telnet, and other TCP/IP applications, to communication traffic. Based on the information, the Internet Content Provider (ICP) and ISP can properly plan and allocate network application resources.

  • Abnormal traffic detection

    By analyzing NetStream flows, the NMS can detect abnormal traffic, such as different types of attacks on networks in real time. The NMS uses alarm information reported by NetStream to monitor devices to secure network operation.

NetStream is implemented using the following devices:
  • NetStream Data Exporter (NDE): samples and outputs traffic statistics.

  • NetStream Collector (NSC): collects and stores traffic statistics sent by the NDE.

  • NetStream Data Analyzer (NDA): analyzes traffic statistics. The analysis result is used as the reference for various functions, such as network accounting, network planning, network monitoring, application monitoring, and traffic analysis.

The NE40E is used as an NDE to sample packets, aggregate flows, and output flows.

Figure 3-1 illustrates the relationship among the NDE, NSC, and NDA.

Figure 3-1  NetStream device roles

The NE40E processes NetStream services in the following modes:.
  • Distributed mode

    An interface board samples packets, aggregates flows, and outputs flows.


    LPUF-51-E/LPUI-51-E/LPUF-120/LPUI-120/LPUF-240/LPUI-240/LPUI-240-B/LPUF-480/LPUI-480/LPUI-1T/LPUF-50/LPUF-50-L/LPUF-51/LPUI-51/LPUI-51-S/LPUS-51/LPUF-101/LPUI-101/LPUS-101/LPUI-120-L/LPUI-240-L/LPUF-200/LPUI-200/LPUI-200-L/LPUI-1T-B/LPUF-120-E/LPUI-102-E/LPUF-240-E/LPUI-480-L/LPUI-1T-L supports the distributed NetStream function.

  • Integrated mode

    An interface board only samples packets and sends sampled packets to the NetStream service processing board. The NetStream service processing board aggregates and outputs flows.

    • The LPUI-51-L supports only packet sampling in centralized sampling.

    • The LPUF-51-E/LPUI-51-E/LPUF-120/LPUI-120/LPUF-240/LPUI-240/LPUI-240-B/LPUF-480/LPUI-480/LPUI-1T/LPUF-50/LPUF-50-L/LPUF-51/LPUI-51/LPUI-51-S/LPUS-51/LPUF-101/LPUI-101/LPUS-101/LPUI-120-L/LPUI-240-L/LPUF-200/LPUI-200/LPUI-21-L/LPUI-200-L/LPUI-1T-B/LPUF-120-E/LPUI-102-E/LPUF-240-E/LPUI-480-L/LPUI-1T-L supports only sampling packet processing in centralized sampling.

Updated: 2018-07-12

Document ID: EDOC1100028538

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