How to set up Quality of Service (QoS)

Quality of Service (QoS) in Bandwidth Management is to classify the traffic into different groups and give different priority to each group. Thus when the bandwidth is limited, we can reserve bandwidth for critical applications and make sure the unimportant activities won't take up all the bandwidth.

Vigor Router supports three classes for QoS. For the traffic that does not belong to any of them will be categorized as "Other." To configure QoS on Vigor routers, take the following steps. 

1. Edit Class Rule: Go to Bandwidth Management >> Quality of Service, click Edit on the Class you would like to configure.

a screenshot of QoS setup on DrayOS

2. Give this Class a name, select a rule index, and click Edit.

a screenshot of QoS setup on DrayOS

3. Check ACT to enable this rule, specify the IP address or service type of the traffic you'd like to classify into Class 1.

a screenshot of QoS setup on DrayOS

4. Click Add to add more rules for this Class. Click OK to finish.

a screenshot of QoS setup on DrayOS

5. Similarly, specify the types of traffic that should classify into in the other two classes.

a screenshot of QoS setup on DrayOS

6. Next, on the same page, click Setup on the WAN index that you would like to set up QoS.

a screenshot of QoS setup on DrayOS

7. In the setup page,

  1. Check Enable the QoS Control,
  2. enter the WAN interface's actual bandwidth for Inbound and Outbound Bandwidth, (DSL WAN's bandwidth will be detected by the router automatically. If you don't know the actual bandwidth, you may use online speed test page such as http://www.speedtest.net)
  3. enter the Reserved Bandwidth Ratio for each Class,
  4. Click OK to save.
a screenshot of QoS setup on DrayOS

NOTE:

  • Enable UDP Bandwidth Control is for preventing P2P/BT services occupying the bandwidth.
  • Outbound TCP ACK Prioritize to make sure TCP connections respond ACK first so it can get the next packet. Because when the peer did not receive an ACK, TCP reduces the offered load by half to avoid congestion.

8. Now the QoS settings are complete. Network Administrator may click Status to check the bandwidth usage of each Class.

a screenshot of QoS status on DrayOS

Vigor3900 support Hardware QoS for one WAN, its performance is better than software QoS; therefore, we strongly recommend to use the Hardware QoS first. 

The example below will show how to configure Vigor3900 QoS for the scenario below. Please notice that the weight is not in percentage, the router will regulate the traffic by the proportion of each class.

Class  High  Medium  Normal  Low
Usage FTP server HTTP Server  Default (for all)   Un-defined
Weight 40 30 20 10

1. Go to Bandwidth Management >> Quality of Service >> Hardware QoS to set up the QoS configuration:

  1. Select the WAN interface.
  2. Enable Outgoing QoS, set the Outgoing Bandwidth and its Queue weight.
  3. Enable Incoming QoS, set the Incoming Bandwidth and its Queue weight.(It is suggested to input the real line speed for Bandwidth. If you don't know the actual Internet speed, perform a speed test it by websites like  http://www.speedtest.net/.)
  4. Click Apply to save.
screenshot of Vigor3900 QoS settings

2. Go to the Bandwidth Management >> QoS Rule, and click Add to set up the rule profile.

screenshot of Vigor3900 QoS settings

3. Configure the QoS rule for HTTP Server:

  1. Enter a Profile name, check Enable, and set Queue Number to Medium.
  2. Select the IP object of the HTTP Server in Local Address.
  3. Select the Service Type object of HTTP Server at Service Type.
    (Note: To create customized service types, go to Object Setting >> Service Type Object)
screenshot of Vigor3900 QoS settings

4. Repeat step 3 to set the QoS rule for FTP Server.

screenshot of Vigor3900 QoS settings

5. After finishing the settings, go to Bandwidth Management >> Quality of Service >> Hardware QoS to check if the QoS rule is working.

screenshot of Vigor3900 QoS Status

Published On: May 25, 2016 

Was this helpful?     


Related Articles