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Configuration Guide - Network Management and Monitoring

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, NETCONF, OpenFlow, LLDP, NQA, Mirroring, Packet Capture, Packet Trace, Path and Connectivity Detection Configuration, NetStream, sFlow, and iPCA.
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NetStream System Components

NetStream System Components

A typical NetStream system consists of the NetStream Data Exporter (NDE), NetStream Collector (NSC), and NetStream Data Analyzer (NDA).

  • NDE

    An NDE analyzes and processes network flows, extracts the flows that meet the conditions for statistics, and exports the statistics to the NSC. The NDE can perform operations (such as aggregation) over the statistics before exporting them to the NSC. A device configured with NetStream functions as the NDE in a NetStream system.

  • NSC

    An NSC is a program running on the Unix or Windows operating system. The NSC parses packets from the NDE and saves statistics to the database. The NSC can collect data exported from multiple NDEs, and filter and aggregate the data.

  • NDA

    An NDA is a traffic analysis tool. It extracts statistics from the NSC, processes the statistics, and generates a report. This report provides a basis for services such as traffic accounting, network planning, and attack monitoring. The NDA provides a graphical user interface (GUI) for users to easily obtain, check, and analyze the collected data.

In real networking, the NSC and NDA are integrated on one NetStream server, as shown in Figure 14-1. The NDE samples packets to obtain outbound traffic information on 10GE1/0/1 and creates NetStream flows based on the conditions. When the NetStream cache is full or a NetStream flow is aged out, the NDE encapsulates statistics in NetStream packets and sends the packets to the NetStream server. The NetStream server analyzes the NetStream packets and displays the result of this analysis.

Figure 14-1 Networking diagram of a NetStream system

NetStream working process

As shown in Figure 14-1, the NetStream system works as follows:

  1. The device with NetStream configured (that is, NDE) periodically sends collected traffic statistics to the NSC.
  2. The NSC processes the traffic statistics, and sends them to NDA.
  3. The NDA analyzes the traffic statistics and stores them as the basis of accounting and network planning.
The device functioning as an NDE implements the following functions:
  1. The NDE samples service traffic in a certain sampling mode and creates NetStream flows. For details, see NetStream Flow Creation.
  2. The NetStream flows age out when certain conditions are met. For details about flow aging, see NetStream Flow Aging.
  3. When NetStream flows age out, the device outputs the aging flows. For details about flow export, see NetStream Flow Export.
Updated: 2019-04-20

Document ID: EDOC1100075365

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