Example for Configuring an NQA Test to Detect the DNS Resolution Speed on an IP Network

This section provides an example for configuring an NQA test to measure the performance of interaction between a client and the DNS server.

Networking Requirements

On the network shown in Figure 1, Device A needs to access host A using the domain name Server.com. A DNS test instance can be configured on Device A to measure the performance of interaction between Device A and the DNS server.

Figure 1 Networking diagram for detecting the DNS resolution speed

In this example, interface 1 is GigabitEthernet 0/1/0.

Configuration Roadmap

The configuration roadmap is as follows:

Configure reachable routes between Device A, the DNS server, and host A at the network layer.
Configure a DNS test instance on Device A and start the test instance to detect the DNS resolution speed on an IP network.

Data Preparation

To complete the configuration, you need the following data:

IP address of the DNS server
Domain name and IP address of host A

Procedure

Configure reachable routes between Device A, the DNS server, and host A at the network layer. (Omitted)

Configure a DNS test instance and start it.

<HUAWEI> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] dns resolve
[*DeviceA] dns server 10.3.1.1
[*DeviceA] dns server source-ip 10.1.1.1
[*DeviceA] nqa test-instance admin dns
[*DeviceA-nqa-admin-dns] test-type dns
[*DeviceA-nqa-admin-dns] dns-server ipv4 10.3.1.1
[*DeviceA-nqa-admin-dns] destination-address url Server.com
[*DeviceA-nqa-admin-dns] commit
[~DeviceA-nqa-admin-dns] start now
[*DeviceA-nqa-admin-dns] commit

Verify the test result. Min/Max/Average Completion Time indicates the delay between the time when a DNS request packet is sent and the time when a DNS response packet is received. In this example, the delay is 208 ms.

[~DeviceA-nqa-admin-dns] display nqa results test-instance admin dns
NQA entry(admin, dns) :testflag is inactive ,testtype is dns
  1 . Test 1 result   The test is finished
   Send operation times: 1                Receive response times: 1             
   Completion:success                     RTD OverThresholds number:0           
   Attempts number:1                      Drop operation number:0               
   Disconnect operation number:0          Operation timeout number:0            
   System busy operation number:0         Connection fail number:0              
   Operation sequence errors number:0     RTT Status errors number:0            
   Destination ip address:10.3.1.1
   Min/Max/Average Completion Time: 208/208/208    Sum/Square-Sum  Completion Time: 208/43264
   Last Good Probe Time: 2018-01-25 09:18:22.6
   Lost packet ratio: 0 %

Configuration Files

Device A configuration file

#
sysname DeviceA
#
dns resolve
dns server 10.3.1.1
dns server source-ip 10.1.1.1
#
nqa test-instance admin dns
 test-type dns
 destination-address url Server.com
 dns-server ipv4 10.3.1.1
#
return