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HUAWEI NetEngine5000E Core Router
Configuration Guide - System Management
6.1 NetStream Overview
As the Internet develops rapidly, more bandwidth resources are provided from users and at the
same time a higher requirement for delicate network monitoring and management is raised. A
technology is needed to address such a requirement. NetStream is a technology that provides
highly granular per-flow statistics on network traffic. It classifies statistics about traffic flows
and resource usage on the network. NetStream can also help monitor and manage the network
based on the types of services and resources.
NetStream provides the following functions:
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The implementation of NetStream requires three devices:
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The NE5000E is used as an NDE to sample packets, aggregate flows, and output flows.
The following figure shows the relationship among the NDE, NSC, and NDA.
Issue 01 (2011-10-15)
Accounting
NetStream provides detailed accounting statistics, including the IP address, number of
packets, number of bytes, time, Type of Service (ToS), and application type. Based on the
collected statistics, the Internet Service Provider (ISP) can charge users flexibly based on
the resource usage (such as time periods, bandwidth, application, or QoS) and enterprises
can count their expenses or assign costs to make effective use of resources.
Network planning and analysis
NetStream provides key information for advanced network management tools to optimize
the network design and planning. This helps to obtain the best network performance and
reliability with the lowest network operation cost.
Network monitoring
NetStream provides real-time monitoring of network traffic. It uses the remote monitoring
(RMON), RMON-2, and flow-based analysis technology to visually represent the traffic
mode of a single router and all routers on the network, and provides functions such as
proactive fault detection, effective fault rectification, and rapid problem solution.
Application monitoring and analysis
NetStream provides detailed network application information. For example, it allows the
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 to meet users' requirements.
Abnormal traffic detection
By analyzing NetStream flows, the NMS can detect abnormal traffic (such as different
types of attacks) on the network in real time. Based on alarm information on the NMS and
the association between the NMS and devices, network security can be guaranteed.
NetStream Data Exporter (NDE): samples and outputs traffic statistics.
NetStream Collector (NSC): collects and stores traffic statistics sent from 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 analysis.
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Copyright © Huawei Technologies Co., Ltd.
6 NetStream Configuration
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