Configure Quality of Service on the WAP351

Objective

Using Quality of Service (QoS) is a good way to optimize network traffic. Quality of Service lets you slow lower priority traffic in order to provide better throughput of higher priority traffic. Based on the trust mode selected, incoming packets are sorted into 4 different queues, which are then processed according to user-defined priority.

The objective of this article is to show you how to configure Quality of Service settings on the WAP351.

Applicable Devices

• WAP351

Software Version

• v1.0.1.3

Configuring Quality of Service

Step 1. Log in to the web configuration utility and choose Quality of Service > Global Settings. The Global Settings page opens:

Basic Settings

Step 1. Check the Enable checkbox in the QoS Mode field to turn on Quality of Service.

Step 2. In the Trust Mode drop-down list, choose an option to determine how received packets are assigned priorities.

The options are:

• CoS/802.1p – Priority is assigned to incoming packets based on its 802.1p value. If a packet is not tagged, it is given a priority of 0. You can adjust the priority mapping settings in the
• CoS/802.1p to Ouput Queue Table.
• DSCP – The priority of a packet received is based off its IP ToS/DSCP value. If a packet is not tagged, it is given a priority of 0. You can adjust the priority mapping settings in the
• DSCP to Output Queue Table.
• Port – In this mode, the priority of a packet is determined by the CoS (Class of Service) of the port it came through. The CoS value of each ports can be configured in the

LAN > Port Settings page. If this option is selected, the priority mapping settings will be displayed in the Port CoS/802.1p Status table.

Note: Depending on the option you selected, navigate to the appropriate table to configure the priority mapping settings.

Port CoS/802.1p Status

Step 1. If you selected Port in the Trust Mode drop-down list, the Port CoS/802.1p Status table will appear. This table shows the priority mappings assigned to each port (labeled GE1 – 5) on the WAP. To edit these mappings, click the [Edit] link to go to the LAN > Port Settings page.

Step 2. On the Port Settings page, check the checkbox(s) of the port(s) you wish to edit, then click the Edit button. The fields of each selected port will become available. In the CoS drop-down lists, select a CoS value for each port. The values range from 0-7, with 0 being the lowest and 7 the highest.

CoS/802.1p to Output Queue Table

Step 1. Navigate to the CoS/802.1p to Output Queue Setting area. The table here maps 802.1p priorities to specified output queues. The CoS/802.1p field lists priorities ranging from 0-7, where 7 is the highest priority. The Output Queue drop-down lists show the output queues (ranging from 0-3) that each priority is mapped to. Use the drop-down lists to adjust which priorities are mapped to each queue.

DSCP to Output Queue Table

Step 1. Navigate to the DSCP to Output Queue Setting area. The table here maps DSCP priorities to specified output queues. The DSCP field lists priorities ranging from 0-63. These priorities are not required to have set associations, but it is recommended that 0 be given to lowest priority and 63 to highest. The Output Queue drop-down lists show the output queues (ranging from 0-3) that each priority is mapped to. Use the drop-down lists to adjust which priorities are mapped to each queue.

Scheduling Settings

Step 1. Navigate to the Scheduling Settings area. In the Scheduling Table, you can adjust how the queues are scheduled. By default, the Strict Priority radio buttons are selected. In this mode, the priority is Queue 3 > Queue 2 > Queue 1 > Queue 0.

Step 2. Click a queue’s WRR radio button to switch to WRR (weighted round-robin) mode. In this mode, queues are scheduled in a round-robin method according to the service weight of each queue. WRR is only allowed in the following configurations: [Q0, Q1], [Q0, Q1, Q2], and [Q0, Q1, Q2, Q3].

Step 3. If WRR is enabled, you can adjust the service weight of each available queue in the WRR Weight field. The valid range is 1-49.

Note: The % of WRR Bandwidth shows how often each queue will be serviced in WRR mode. It changes depending on the values entered in the WRR Weight fields.

Step 4. Click Save.