Example for Configuring an NQA UDP Jitter Test to Monitor the VoIP Service Jitter Time

This section provides an example for configuring an NQA UDP jitter test to monitor the jitter time for Voice over Internet Protocol (VoIP) services.

Networking Requirements

On the network shown in Figure 1, the headquarters and a subsidiary of a company often need to use VoIP to hold teleconferences. The round-trip delay time must be less than 250 ms, and the jitter time must be less than 20 ms. The UDP jitter test can be configured to simulate VoIP services.

Figure 1 Networking diagram for an NQA UDP jitter test to monitor the VoIP service jitter time

Interface 1 in this example is GE0/1/0, respectively.

Configuration Roadmap

The configuration roadmap is as follows:

Configure Device A as the NQA server and Device D as the NQA client, and create a UDP jitter test instance on Device D.
Start the test instance.

Data Preparation

To complete the configuration, you need the following data:

IP addresses of Device A and Device D that are connected to the IP backbone network
Code type for simulated VoIP services

Procedure

Configure the NQA server Device A.

<DeviceA> system-view
[~DeviceA] nqa-server udpecho 10.1.1.1 4000
[*DeviceA] commit

Configure the NQA client Device D.

Configure the packet version for the test instance.

<DeviceD> system-view
[~DeviceD] nqa-jitter tag-version 2

Create a UDP jitter test instance and set the destination IP address to the IP address of Device A.

[*DeviceD] nqa test-instance admin udpjitter
[*DeviceD-nqa-admin-udpjitter] test-type jitter
[*DeviceD-nqa-admin-udpjitter] destination-address ipv4 10.1.1.1
[*DeviceD-nqa-admin-udpjitter] destination-port 4000

Specify the code type for simulated VoIP services.

[*DeviceD-nqa-admin-udpjitter] jitter-codec g711a

Start the test instance immediately.

[*DeviceD-nqa-admin-udpjitter] start now
[*DeviceD-nqa-admin-udpjitter] commit

Verify the test result. Run the display nqa results test-instance admin udpjitter command on Device D. The command output shows that the round-trip delay time is less than 250 ms, and the jitter time is less than 20 ms.
```
[Max Delay SD:203 Delay SD Square Sum:254974 Packet Loss SD:0 Packet Loss Unknown:81 Average of Jitter SD:2 jitter out value:0.0000000 NumberOfOWD:919 OWD SD Sum:1834 ICPIF value:23 TimeStamp unit:ms       
```
class="keyword">~DeviceD-nqa-admin-udpjitter] display nqa results test-instance admin udpjitter udpjitter) :testflag is active ,testtype is jitter The test is finished ResponseProbe:919 RTD OverThresholds number:0 OWD OverThresholds DS number:0 RTT Square Sum:1032361 Drop operation number:0 errors number:0 RTT Stats errors number:0 Operation timeout number:81 Min Positive DS:1 Max Positive DS:9 Positive DS Number:70 Positive DS Sum:80 Positive DS Square Sum:156 Min Negative DS:1 Max Negative DS:25 Negative DS Number:82 Negative DS Sum:287 Negative DS Square Sum:4937 Min Delay DS:0 Max Delay DS:204 Delay DS Square Sum:257072 Packet Loss DS:0 Average of Jitter:2 Average of Jitter DS:2 jitter in value:0.0000000 Packet Loss Ratio:8 % OWD DS Sum:1848 MOS-CQ value:354

Configuration Files

Device A configuration file

#
sysname DeviceA
#
 nqa-server udpecho 10.1.1.1 4000
#
isis 1
 network-entity 00.0000.0000.0001.00  
#
 interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 isis enable 1 
#
return

Device D configuration file

#
sysname DeviceD
#
nqa-jitter tag-version 2
#
isis 1
 network-entity 00.0000.0000.0002.00  
#
 interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.2.2.1 255.255.255.0
 isis enable 1 
#
nqa test-instance admin udpjitter
 test-type jitter
 destination-address ipv4 10.1.1.1
 destination-port 4000
 jitter-codec g711a
 start now      
#
return