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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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Enabling a Switch to Perform NetStream Sampling in Enhanced Mode

Enabling a Switch to Perform NetStream Sampling in Enhanced Mode

Context

A switch can perform NetStream sampling in either of the following two modes:
  • Non-enhanced mode: A switch uses the CPU for NetStream sampling, which greatly affects CPU performance.
  • Enhanced mode: A switch uses CPU built-in chip for NetStream sampling, which therefore does not affect CPU performance and improves the NetStream performance.

The CE6875EI supports NetStream sampling in enhanced mode, improving NetStream performance. In enhanced mode, when NetStream is configured in outbound and inbound directions on all the interfaces of a switch and the interface rate reaches the upper limit, the recommended minimum NetStream sampling rate is 2048. In other cases, calculate the NetStream sampling rate according to the formula provided in Calculation of the NetStream Sampling Rate.

NOTE:

Only the CE8868EI, CE8861EI, CE8850-64CQ-EI, CE6875EI, CE6857EI, and CE6865EI support the assign forward enp netstream enable command.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run assign forward enp netstream enable slot slot-id

    The switch is enabled to perform NetStream sampling in enhanced mode.

    By default, a switch performs NetStream sampling in non-enhanced mode; that is, a switch uses the CPU for NetStream sampling.

    NOTE:
    • When a switch performs NetStream sampling in enhanced mode, the switch cannot send NetStream packets through the management interface.

    • If both the assign forward enp netstream enable and assign forward enp sflow enable commands are run, the later one overwrites the previous one.

    • This command takes effect after the switch is restarted.

  3. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100075365

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