You can configure BIG-IP® Link Controller™ to use cost-based load balancing to manage the traffic flowing in and out of a network. In cost-based load balancing, you prioritize link usage based on the cost of the bandwidth for the connection to the Internet. Link Controller sends traffic to the link that is currently operating at the lowest cost. As the usage cost for each link changes, Link Controller dynamically shifts traffic to the best link.
The following illustration shows a network for configuring a cost-based load balancing configuration.
Example of a network for configuring cost-based load balancing
As the illustration shows, while traffic remains below a certain level (for example, 4 Mbps), the Link Controller uses the Primary Link. If traffic exceeds a certain level (for example, 4 Mbps), the Link Controller sends the overflow traffic to the Secondary Link. If a link goes offline for any reason, Link Controller uses the Alternate and Fallback load balancing methods to route traffic through an available link.
Use the tasks in this implementation to create a cost-based, load balancing configuration to manage the traffic flowing in and out of a network.
You now have Link Controller™ configured to use cost-based load balancing to manage DNS traffic.