SD-WAN chart for MOS scoring FAZ

This information is also available in the FortiAnalyzer 7.2 Administration Guide: SD-WAN Summary

An Audio MOS Score widget is added to FortiView > Monitors > Secure SD-WAN Monitor and FortiView > Monitors > SD-WAN Summary. These widgets display logs for the MOS (mean opinion score) of voice and video traffic.

MOS is a method to measure the impact network quality has on the quality of a voice call. It is the industry standard for measuring voice and video quality on a WAN link.

The FortiGate version must be on version 7.2 or later and have the MOS codec and MOS threshold attributes defined for SD-WAN health check in order for FortiAnalyzer to display information in the MOS scoring widgets.

To view the Audio MOS Score for individual devices:

1. Go to FortiView > Monitors > Secure SD-WAN Monitor.
2. Click Add Widget, and add the Audio MOS Score widget.

   The widget includes a line graph of the MOS score for different codecs for the selected device over a specified time period.
   

3. Click a codec in the legend to make it appear/disappear on the chart.

   Greyed-out interfaces on the legend do not appear on the chart.
   

4. Hover your cursor over the chart to see a summary at that point.

   This summary includes the MOS score and the VoIP quality at that time. VoIP quality is divided into levels based on MOS scoring: Excellent = 4.3 - 5.0, Good = 4.0 - 4.3, Fair = 3.6 - 4.0, Poor = 3.1 - 3.6, Bad = 2.6 - 1.0.
   

To view the Audio MOS Score across all devices:

1. Go to FortiView > Monitors > SD-WAN Summary.
2. Click Add Widget, and add the Audio MOS Score widget.

   The widget includes a line graph of MOS score per device on the network.
   

3. Click a device in the legend to make it appear/disappear on the chart.

   Greyed-out devices on the legend do not appear on the chart.
   

4. Hover your cursor over the chart to see a summary at that point.

   This summary includes the MOS score and the VoIP quality at that time.
   

To configure the FortiGate MOS codec and threshold in health check settings:

1. Access the FortiGate CLI.
2. Enter the following commands:

   config system sdwan

   config health-check

   edit <name>

   set server {string}

   set sla-fail-log-period {integer}

   set sla-pass-log-period {integer}

   set members <seq-num1>, <seq-num2>, ...

   set mos-codec [g711|g722|...]

   config sla

   edit <id>

   set link-cost-factor {option1}, {option2}, ...

   set mos-threshold {string}

   next

   end

   For example:

   config system sdwan

   config health-check

   edit "test_dc"

   set server "10.200.1.1"

   set sla-fail-log-period 15

   set sla-pass-log-period 15

   set members 1 2

   set mos-codec g722

   config sla

   edit 1

   set link-cost-factor latency jitter packet-loss mos

   set mos-threshold "2.0"

   next

   end