# QoS

### 1. Summary

In this page you can edit the settings of the QoS (Quality of Service) function.

### 2. Top page

This is the top page for QoS.

#### 2.1. Setting optimization for web conferencing software

- Clicking the "Next" button starts the process of optimizing QoS settings for the selected web conferencing software.

#### 2.2. System settings

- Displays the QoS function settings for the entire system.

- The table items are explained below.

  - QoS function

    - Displays whether the QoS function is enabled or disabled.

  - Scheduling method

    - Displays the scheduling method settings.

  - CoS - Tx Queue ID Conversion Table

    - Displays the Tx queue ID setting corresponding to the CoS value.

  - DSCP - Tx Queue ID Conversion Table

    - Displays the Tx queue ID setting 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 port

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

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

- If you press the "Return to defaults" button, the settings will be initialized for all LAN ports whose check box contains 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. Settings optimization page for web conferencing software

This page is for optimizing QoS settings for web conferencing software.
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.

Setting optimization for web conferencing software with change the following settings.
- QoS is enabled.
- The trust mode is set to DSCP for all ports.
- The following DSCP values used by Zoom Meetings are assigned to a high-priority Tx queue.
- The following DSCP values used by Microsoft Teams are assigned to a high-priority Tx queue.
- All other DSCP values are assigned to the lowest-priority Tx queue.

#### 3.1. Setting optimization for web conferencing software

- Applicable software

  - Scheduling is set to Strict Priority for all Tx queues.

### 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.

- Scheduling method

  - Weighted Round Robin

    - Frames are transmitted based on the weight ratio for each queue.

    - Frames can also be transmitted from a lower-priority queue, within a specified percentage.

  - Strict Priority

    - The data with the highest priority in the transmission queue will be transmitted first.

    - When a frame is stored in a high-priority queue, it can never be transmitted from a lower-priority queue.

- CoS - Tx Queue ID Conversion Table

  - Sets the Tx queue ID corresponding to each CoS value.

  - The Tx queue ID setting range is 0 - 7, where the larger the ID setting value, the higher the priority for sending frames.

  - The "Easy Input" button allows the following settings to be entered at the same time in the CoS - Tx Queue ID Conversion Table.

    - Default Settings

      - These are the factory default settings.

- DSCP - Tx Queue ID Conversion Table

  - Sets the Tx queue ID corresponding to each DSCP value.

  - The Tx queue ID setting range is 0 - 7, where the larger the ID setting value, the higher the priority for sending frames.

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

  - The "Easy Input" button allows the following settings to be entered at the same time in the DSCP - Tx Queue ID Conversion Table.

    - Default Settings

      - These are the factory default settings.

    - Setting optimization for web conferencing software

      - This assigns the DSCP values used by the web conferencing software to the highest priority queue and the unused DSCP values to the lowest priority queue.

      - Select at least one web conferencing software.

### 5. Interface settings page

Set the "Trust mode" setting which means whether the transmission queue is determined based on the packet’s CoS value or the DSCP 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 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.

    - If remarking is enabled, the CoS value is remarked by the specified value, and the transmission queue is reassigned.

    - For details on checking and changing the "CoS - Transmission queue ID conversion table," refer to the command reference.

  - 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.

    - If remarking is enabled, the DSCP value is remarked by the specified value, and the transmission queue is reassigned.

    - For details on checking and changing the "DSCP - Transmission queue ID conversion table," refer to the command reference.

  - 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".

### 6. Trademark Attributions

- Zoom is a registered trademark or trademark of Zoom Video Communications, Inc. in the U.S.A. and other countries.

- Microsoft Teams is a registered trademark or trademark of Microsoft Corporation in the U.S.A. and other countries.

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