Configuration of Quality of Service (QoS) on WRVS4400N Wireless-N Gigabit Security Routers

Objective

Quality of Service (QoS) enables the network device to provide better service to the selected network traffic by helping to prioritize the traffic based on the type of data. QoS also helps in bandwidth management.

Network devices use match criteria such as Class of Service (CoS) and Differentiated Service Code Point (DSCP) to classify the traffic to which the packet belongs. The classified packets are queued at the interface of the network device and are sent out on the basis of priority.

QoS, CoS, DSCP, and Queues work together to enhance the flow of the information. For example in a company network a certain packet of data is received, first the QoS analyzes what kind of data it is, such as video, voice, and text, and assigns a priority to it. Then the CoS groups the information that has the same characteristics. This happens while the DSCP manages the network traffic. As the last part, the Queue finds the right path to send the information to the final user based on the priority that the CoS assigns to the data.

This document explains how to configure QoS on the WRVS4400N Wireless-N Gigabit Security Router.

Applicable Devices

• WRVS4400N Wireless-N Gigabit Security Router

Software Version

• v2.0.1.3

QoS Configuration

CoS and Queue Settings

Step 1. Log in to the web configuration utility and choose QoS > QoS Setup. The QoS Setup page opens:

Step 2.  Choose the trust mode that you would like to assign to the port from the Trust Mode drop-down list.The trust mode is the option that the system has for the security features. The possible options are:

• Port — Prioritize all traffic that enters this port.

• DSCP — Differentiated services are used in a network to classify and manage the network traffic and also provide quality of service (QoS) on modern IP networks.  

• CoS — Class of Service is used to manage the traffic in a network. Similar types of files are grouped together and each type of file is treated as a class with its own level of service priority.

Step 3. Choose the default CoS that you would like to assign to the port from the Default CoS/Port drop-down list.The CoS uses the highest priority because it classifies the different packets that the network receives or sends.

Step 4. From the Queue drop-down list for the desired Priority, choose the traffic forwarding queue to which to map that CoS priority, where 1 is the lowest priority and 4 is the highest. Only ports with Trust Mode set to CoS will send traffic through these CoS queues.

Step 5. Click Save at the bottom of the configuration utility for the new CoS settings to go into effect.

Configure DSCP

Step 1.Log in to the web configuration utility and choose QoS > DSCP Setup. The DSCP Setup page opens:

Step 2. For the desired DSCP, choose the traffic forwarding queue to which to map that DSCP from the Queue drop-down list, where 1 is the lowest priority, and 4 is the highest.

Note: DSCP values 3, 11, 19, 27, 35, 43, 51, 59 are predefined and cannot be changed.

Step 3. Repeat Step 2 to map other DSCP values to a traffic forwarding queue.

Step 4. Click Save at the bottom of the configuration utility for the new DSCP settings to go into effect.