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Configuring nqa, Overview, Nqa operation – H3C Technologies H3C S6300 Series Switches User Manual

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Configuring NQA

Overview

Network quality analyzer (NQA) allows you to measure network performance, verify the service levels

for IP services and applications, and troubleshoot network problems. It provides the following types of
operations:

ICMP echo

DHCP

DNS

FTP

HTTP

UDP jitter

SNMP

TCP

UDP echo

Voice

Path jitter

DLSw

As shown in

Figure 36

, the NQA source device (NQA client) sends data to the NQA destination device

by simulating IP services and applications to measure network performance. The obtained performance

metrics include the one-way latency, jitter, packet loss, voice quality, application performance, and

server response time.
All types of NQA operations require the NQA client, but only the TCP, UDP echo, UDP jitter, and voice

operations require the NQA server. The NQA operations for services that are already provided by the

destination device such as FTP do not need the NQA server.
You can configure the NQA server to listen and respond to specific IP addresses and ports to meet
various test needs.

Figure 36 Network diagram

NQA operation

The following describes how NQA performs operations of different types:

A TCP or DLSw operation sets up a connection.