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CLI-based Configuration Guide - Network Management and Monitoring

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the network management feature supported by the device.
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DNS Test

DNS Test

The NQA DNS test is performed using the User Datagram Protocol (UDP) packets. The NQA client simulates a DNS client and sends a DNS request to a specified Dynamic Host Configuration Protocol (DHCP) server. This test helps you determine DNS server availability and measure DNS resolution speed.

Figure 7-2 shows the process of a DNS test:

  1. The DNS client (RouterA) sends a DNS query packet to the DNS server, requesting the server to resolve a specified DNS name.

  2. The DNS server receives the query packet, constructs a response packet, and sends it to the client.

  3. RouterA receives the response packet and calculates the time between when it sent the query packet and when it received the response packet.

Figure 7-2  Network for DNS test

A DNS test only simulates the DNS resolution process. It does not save the mapping between domain names and IP addresses.

However, DNS test results and historical records are collected in test instances. You can run commands to view the test results and historical records.

Updated: 2019-03-06

Document ID: EDOC1100069336

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