How do I configure Bandwidth Management and Quality of Service rules on my Barracuda Link Balancer?

Solution #00003849

Scope:
All Barracuda Link Balancers, all firmware versions.

Answer:
The Barracuda Link Balancer has the ability to measure and control the communications (traffic, packets) on the configured network links.

Quality of Service rules allow you to specify that certain application traffic should be prioritized or deprioritized. Use the Firewall > Applications page to view and define applications that will be included in the bandwidth management. A Quality of Service rule may also specify which WAN link to use. For example, one might use Quality of Service rules to keep client traffic on a different WAN link than the server traffic. Configure the Quality of Service rules using the Policy > Bandwidth Mgmt page. Only applications that are specifically marked to be included in bandwidth management appear on the Policy > Bandwidth Mgmt page.

Predefined Applications QoS bandwidth management rules may be applied to the listed common applications simply by selecting the priority you would like these applications to have.

Name - This is the name of the application that the rule will apply to.
Priority - This field allows you to select the priority used for traffic matching this application.
Interface - If desired, you may lock the application traffic to only use a specific WAN interface

If you do not see the application for which you would like to create a rule on the Policy > Bandwidth Mgmt page, go to the Policy > Applications page. If the application is listed there, you will need to specify that the application is included in bandwidth management. Click on the Edit tool graphic to edit the application in a row. Using the Edit Application dialog box, you can specify that this application should be included in bandwidth management. If the application is not already on the Policy > Applications page, then click Add New Application under the Custom Applications section at the top of the page. Once defined, if the Include in Bandwidth Mgmt setting is selected, bandwidth management rules can be applied to those applications in the Custom Applications QoS section of the Policy > Bandwidth Mgmt page.

Name - This is the name of the application that the rule will apply to.
Priority - This field allows you to select the priority used for traffic matching this application.
Interface - If desired, you may lock the application traffic to only use a specific WAN interface

Use the IP QoS section to allow bandwidth management rules to be applied to a specific IP or subnet:

Name - Label or identifier for this IP rule.
Priority - This field allows you to select the priority used for traffic destined to or originating from this IP.
Source IP Address - The IP that will be the origin of the traffic this rule applies to. (Leave blank to match any source IP.)
Destination IP Address - The destination ip address of traffic matching this rule. (Leave blank to match any destination IP.)
Interfaces - If desired, you may lock the matching traffic to only use a specific WAN interface
Bandwidth Management and Quality of Service only apply to outbound traffic

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