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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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Configuring an ICMP Jitter Test Instance

Configuring an ICMP Jitter Test Instance


Before configuring an ICMP jitter test, ensure that the NQA client and the tested device have reachable routes to each other.

When configuring an ICMP jitter test instance, you can set the number of packets to be sent consecutively in a single test. This configuration can simulate traffic of various types in a specified period. For example, you can simulate voice service traffic through this configuration.


Perform the following steps on the NQA client. The NQA client also functions as the ICMP jitter client.

The timeout, probe-count, frequency, jitter-packetnum, and interval commands constrain each other; therefore, properly set the values when running the five commands. Improper command settings may lead to test failure.

  • On a network with poor quality and low transmission rate, increase the timeout value to ensure that the response to NQA detection packets can be received.
  • On a network with low reliability, increase the probe-count value because multiple detection packets may need to be sent to ensure successful detection.
  • The frequency value must comply with the following rules:

    frequency > interval × (probe-count × jitter-packetnum - 1) + timeout


  1. Run system-view

    The system view is displayed.

  2. Run nqa test-instance admin-name test-name

    An NQA test instance is created, and the NQA view is displayed.

  3. Run test-type icmpjitter

    The test type is set to ICMP Jitter.

  4. Run destination-address ipv4 ipv4-address

    The destination address is configured.

  5. Configure global parameters for the test instance to simulate network packets.

    • Run description string

      A description is configured for the test instance.

    • Run frequency interval

      The test period is set for the NQA test instance.

    • Run timeout time

      The timeout period of a probe is set for the NQA test instance.

    • Run fail-percent percent

      The failure percentage is set for the NQA test instance.

      By default, the failure percentage is 100%, that is, the test is regarded failed only when all the probes fail.

    • Run icmp-jitter-mode { icmp-echo | icmp-timestamp }

      An NQA ICMP jitter test instance is created.

    • Run datafill fillstring

      The padding field is configured.

    • Run datasize size

      The size of Echo Request packets without the IP header is configured.

    • Run jitter-packetnum number

      The number of packets sent each time in a probe is set.

    • Run probe-count number

      The number of probes in a test is set.

    • Run interval { milliseconds interval | seconds interval }

      The interval at which NQA test packets are sent is set.

      A shorter interval enables a test to be complete sooner. Delays occur during the sending and receiving of test packets on the processor. Therefore, if the interval for sending test packets is short, the ICMP Jitter test results are inaccurate.

    • Run source-interface interface-type interface-number

      The source interface used to send test packets is configured.

    • Run source-address ipv4 ipv4-address

      The source IP address is set.

    • Run ttl number

      The TTL value in the NQA test packet is set.

    • Run tos value

      Type of Service (ToS) is set for the test packet.

    • Run vpn-instance vpn-instance-name

      The VPN instance name is configured.

    • Run records history number

      The maximum number of historical records is set for the NQA test instance.

    • Run records result number

      The maximum number of result records is set for the NQA test instance.

    • Run agetime hh:mm:ss

      The aging time is set for the NQA test instance.

  6. Run commit

    The configuration is committed.

Updated: 2019-04-20

Document ID: EDOC1100075365

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