Contents

Configuring SQA·· 1

About SQA· 1

Restrictions and guidelines: SQA configuration· 1

Configuring SQA· 1

Display and maintenance commands for SQA· 1

SQA configuration examples· 2

Example: Configuring SQA· 2

Configuring SQA

About SQA

Service quality analysis (SQA) enables the device to identify SIP-based multimedia traffic and preferentially forward this traffic to ensure multimedia service quality. Use this feature to decrease multimedia stuttering and improve user experience.

Restrictions and guidelines: SQA configuration

SQA does not support analysis of encrypted SIP protocol packets.

Configuring SQA

1.     Enter system view.

system-view

2.     Enter SQA view.

sqa

3.     Enable SQA.

sqa-sip enable

By default, SQA is disabled.

4.     Specify the SIP listening port number.

sqa-sip port port-number

By default, the SIP listening port number is 5060.

Make sure the SIP listening port number on the device is the same as that on the SIP server.

5.     (Optional.) Specify an IP address range for SQA.

sqa-sip filter address start-address end-address

By default, no IP address range is specified for SQA. The device performs SQA on all SIP packets.

After this command is executed, the device performs SQA only on SIP calls in the specified IP address range.

If you execute this command multiple times, the most recent configuration takes effect.

Display and maintenance commands for SQA

Execute display commands in any view .

SQA configuration examples

Example: Configuring SQA

Network configuration

As shown in Figure 1, the SIP server installed with third-party VoIP server software acts as both the SIP proxy server and SIP registrar to manage SIP UA registration and SIP calls. Host A and Host B installed with third-party client software can place calls to each other.

Configure SQA on Device A, Device B, and Device C to optimize multimedia traffic of SIP calls to provide high qualified multimedia services.

Figure 1 Network diagram

Prerequisites

Assign IP addresses to interfaces, and make sure the devices can reach each other.

Procedure

1.     Configure the SIP server:

Install third-party VoIP server software, register UAs, and specify the usernames (phone numbers) and passwords for the clients. (Details not shown.)

2.     Configure PC A and PC B:

Install third-party VoIP client software, specify the IP address of the SIP server, and configure the username (phone number), password, and other parameters on each PC. (Details not shown.)

3.     Configure Device A:

# Enable SQA.

<DeviceA> system-view

[DeviceA] sqa

[DeviceA-sqa] sqa-sip enable

# Specify 5066 as the SIP listening port number. (Make sure this SIP listening port number is the same as that on the SIP server.)

[DeviceA-sqa] sqa-sip port 5066

# Specify an IP address range for SQA. (Make sure Host A's IP address is included in the range.)

[DeviceA-sqa] sqa-sip filter address 6.159.107.200 6.159.107.200

[DeviceA-sqa] quit

4.     Configure Device B and Device C:

# Configure Device B and Device C in the same way as Device A is configured. (Details not shown.)

Verifying the configuration

# Place a call from Host A to Host B. (Details not shown.)

# Display brief information about all SIP calls on Device A.

<DeviceA> display sqa sip call

Caller                 Callee                 CallId

6.159.107.207:49172    6.159.108.51:52410     3101326658

6.159.107.203:49172    6.159.108.47:52410     4530332933

6.159.107.208:49172    6.159.108.52:52410     4445702693

6.159.107.206:49172    6.159.108.50:52410     8263542841

6.159.107.201:49172    6.159.108.45:52410     4752123310

6.159.107.200:49172    6.159.108.44:52410     99462146

The output shows that Device A has performed SQA on the call that Host A placed to Host B.

# Display detailed information about the SIP call that Host A placed to Host B.

<DeviceA> display sqa sip call call-id 99462146 verbose

Call ID: 99462146

  Caller information:

    IP: 6.159.107.200      Port: 49172    MAC: a036-9fd4-b5bd

    Tag: 1111@6.159.1.10

  Callee information:

    IP: 6.159.108.44       Port: 52410    MAC: a036-9fd4-b5bc

    Tag: 2222@6.159.1.10

  Type: Audio     VLAN: 1               StartTime: 2019-7-14 15:40:39

  MOS(F): 88      MOS(R): 86

  Forward flow (octet): 4793344         Forward flow (packet): 4681

  Reverse flow (octet): 3810304         Reverse flow (packet): 3721

The output shows that the MOS value for both forward and reverse traffic is high, which indicates the quality of the audio service is high.