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S12700 V200R011C10 Configuration Guide - Network Management and Monitoring

This document provides the configurations of network management and monitoring features supported by the product, including SNMP, RMON and RMON2, LLDP, Performance Management, iPCA, NQA, Service Diagnosis, Mirroring, Packet Capture, Traffic Distribution, NetStream, sFlow, and TWAMP Light.
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UDP Jitter Test

UDP Jitter Test

The UDP jitter test is performed using UDP packets to determine the delay, jitter, and packet loss ratio based on the timestamps in test packets. Jitter is the interval for receiving two consecutive packets minus the interval for sending the two packets.

The UDP jitter test process is as follows:

  1. The source (SwitchA) sends packets to the destination (SwitchB) at a specified interval.

  2. The destination receives the packets, adds a timestamp to them, and sends them back to the source.

  3. The source receives the returned packets and calculates the jitter by subtracting the interval at which consecutive packets were sent from the interval at which the destination received them.

Figure 6-10  Network for UDP jitter test

The following data can be calculated based on information in the packets received by the source:
  • The maximum, minimum, and average jitter of the packets from the source to the destination and from the destination to the source.

  • Maximum unidirectional delay from the source to the destination or from the destination to the source.

In a UDP jitter test, the maximum number of test packets sent each time is configurable. It is the number of jitter tests (probe-count) multiplied by the number of test packets sent each time (jitter-packetnum).

You can also set the number of consecutive packets to be sent in a single test instance. This setting allows you to simulate actual traffic for a specified period of time. For example, if you set the source to send 3,000 UDP packets at an interval of 20 ms, this would simulate G.711 traffic for 1 minute.

UDP jitter test results and historical records are collected in test instances. You can run commands to view the test results and historical records.

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Updated: 2019-10-21

Document ID: EDOC1000178113

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