# QoS

## 1. Summary

In this page you can edit the settings of the QoS (Quality of Service) function.
You can enable/disable the QoS function, and change the trust mode.

## 2. Top page

This is the top page for QoS.

### 2.1. Web conference applications optimization

- The "Next" button starts the procedure to configure the optimal QoS settings for the web conference application.

### 2.2. System settings

- Displays the QoS settings for the entire system.

- The table items are explained below.

  - QoS function

    - Displays whether the QoS function is enabled.

  - CoS - transmit queue mapping table

    - Displays the transmit queue ID settings corresponding to the CoS value.

  - DSCP - transmit queue mapping table

    - Displays the transmit queue ID settings corresponding to the DSCP value.

- Press the "Setting" button to access a page where you can change the settings

- To enable the QoS function, you must disable flow control.

### 2.3. Interface settings

- The trust mode setting used by the QoS function is shown for each LAN/SFP port

- Press the "Setting" button to access a page where you can change the settings of the selected LAN/SFP port

- If you press the "Specify all" button, the settings can be changed for all LAN/SFP ports whose check box contains a check mark

- If you press the "Return to defaults" button,the settings will be initialized for all LAN/SFP ports whose check boxcontains a check mark

  - The default trust mode setting for all ports is "CoS"

  - The default CoS value for all ports is "0" by default.

- If the settings do not use the QoS function, QoS function settings cannot be made

## 3. Web conference applications optimization page

This page provides optimal QoS settings for web conference applications.
When you have inputted the settings, press the "Confirm" button.
If there are no mistakes in the input content confirmation screen, press the "OK" button.

The following settings are configured in the Optimal Settings for Web conference application.
- Enables QoS.
- Set trust mode to DSCP for all ports.
- Assigns the DSCP value used by the web conferenceapplication to be optimized to the highest priority outgoing queue.
- Assigns the DSCP value not used by the web conference application to be optimized to the lowest priority outgoing queue.
- Sets scheduling of all transmit queues to Strict Priority.

### 3.1. Web conference applications optimization

- Target application

  - Select the web conference application to be optimized.

## 4. System settings page

In this page you can specify whether the QoS function is used.
Enter the settings, and then press the "Confirm" button.
If there are no mistakes in the input content of the confirmation screen, press the "OK" button.
Be aware that if the settings do not use the QoS function, all QoS-related settings will be cleared.

### 4.1. System settings

- QoS function

  - Disable

    - The QoS function will be disabled. At this time, all QoS settings will be cleared.

  - Enable

    - The QoS function will be enabled. QoS-related settings and commands can be executed.

- CoS - transmit queue mapping table

  - Configures the transmit queue ID settings corresponding to each CoS value.

  - The input range of the transmit queue ID is 0 to 7, and a larger ID has a higher priority for sending frames.

  - If you press the "Easy input" button, thefollowing settings can be entered together into the CoS - transmit queue mapping table.

    - Initialization

      - Factory default settings.

- DSCP - transmit queue mapping table

  - Configures the transmit queue ID settings corresponding to each DSCP value.

  - The input range of the transmit queue ID is 0 to 7, and a larger ID has a higher priority for sending frames.

  - When "Display only RFC compliance values"is checked, only RFC-compliant DSCP values will be displayed. However,all DSCP values will be displayed on the input confirmation screen.

  - If you press the "Easy input" button, thefollowing settings can be entered together into the DSCP - transmitqueue mapping table.

    - Initialization

      - Factory default settings.

    - Dante optimization

      - Assigns DSCP values used by Dante to the highest priority queue and unused DSCP values to the lowest priority queue.

    - Web conference applications optimization

      - Assigns DSCP values used by theweb conference application to the highest priority queue and unused DSCP values to the lowest priority queue.

      - Please select at least one web conference application.

## 5. Interface settings page

Set the "Trust mode" setting which means whether thetransmission queue is determined based on the packet’s CoS value or theDSCP value or the Port priority.
Enter the settings, and then press the "Confirm" button.
If there are no mistakes in the input content of the confirmation screen, press the "OK" button.

### 5.1. Interface settings

- Port

  - The LAN/SFP port for which settings are made is shown

- Trust mode

  - Use CoS value to determine transmission queue

    - The packet’s CoS value and the "CoS - Transmission queue ID conversion table" are used to determine the transmission queue

    - If the received packet is an untagged packet, the default CoS value is applied

    - A default CoS value within the 0 - 7 range can be specified.

  - Use DSCP value to determine transmission queue

    - The packet’s DSCP value and the "DSCP - Transmission queue ID conversion table" are used to determine the transmission queue

  - Use the priority specified for the port to determine the transmission queue

    - The transmission queue is determined according to the "Port priority order"

    - Select the transmission queue to be assigned as the port priority order in the range of 0 - 7
      Higher numbers indicate a higher priority order; with the default settings, 2 is selected

    - The setting can be changed only if the trust mode is set to "Port priority"

  - If a policy map is applied to the LAN/SFP port, you cannot change the trust mode setting.

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