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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 Flow Creation

NetStream Flow Creation

The NetStream module on a device samples service traffic in certain modes, and then creates NetStream flows for the sampled traffic.

NetStream Sampling

By cooperating with the sampler, NetStream samples service traffic based on a certain sampling ratio.

NetStream only analyzes the flow information of sampled packets. This reduces the number of sampled packets and the impact on device performance. In addition, the statistics can accurately reflect the traffic conditions on the network.

The device supports packet-based random sampling. That is, packets are randomly sampled within the specified packet interval. For example, for an interval of 100 packets, one packet is sampled from every 100 packets.

NetStream Flows

NetStream is a technology that collects packet statistics based on flows. After sampling packets, the NetStream module analyzes the sampled packets and creates flows based on the key information in packets. This key information is as follows:

  • For Layer 2 information, packets with five identical attributes are considered as a flow. The five attributes are the destination MAC address, source MAC address, VLAN ID, Ethernet type, inbound interface, and outbound interface.
  • For IPv4 packets, packets with seven identical attributes are considered as a flow. The seven attributes are the destination IP address, source IP address, destination port number, source port number, protocol, ToS, and the inbound or outbound interface.
  • For IPv6 packets, packets with eight identical attributes are considered as a flow. The eight attributes are the destination IPv6 address, source IPv6 address, destination port number, source port number, protocol, ToS, flow label, and the inbound or outbound interface.
  • For MPLS packets, NetStream collects the MPLS label information, IP information in MPLS packets, or both.
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Updated: 2019-04-20

Document ID: EDOC1100075365

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