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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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Key Parameters of an NQA Test

Key Parameters of an NQA Test

Key parameters of an NQA test include frequency, interval, probeCount, timeout, and jitter-packetnum.

  • The frequency parameter indicates the interval at which an NQA test instance is automatically performed. It is configured using the frequency interval command.

  • The interval parameter indicates the interval at which probe packets are sent in an NQA test instance. It is configured using the interval { milliseconds interval | seconds interval } command.

  • The probeCount parameter indicates the number of probes to be sent each time for an NQA test instance. It is configured using the probe-count number command.

    Except for the ICMP jitter and UDP jitter tests, the number of probes is equal to the number of probe packets. For the ICMP jitter and UDP jitter tests, the number of probe packets is calculated as follows: probeCount x jitter-packetnum.

  • The timeout parameter indicates the timeout period of a probe for an NQA test instance. It is configured using the timeout time command.

  • The jitter-packetnum parameter indicates the number of packets sent in each probe for an NQA test instance. It is configured using the jitter-packetnum number command.

The frequency value varies according to the test instance type. If the frequency value does not meet the frequency verification formula, the test result may be "no result".

Test Instance Type Frequency Verification Formula
  • ICMP test instance
  • LSP ping test instance
  • TCP test instance

frequency > interval x (probeCount - 1) + timeout

  • ICMP jitter test instance
  • UDP jitter test instance
frequency > interval x (probeCount x jitter-packetnum - 1) + timeout
  • LSP trace test instance
  • Trace test instance
frequency ≥ 60

DNS test instance

frequency > timeout

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Updated: 2020-01-07

Document ID: EDOC1000060766

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