Infoblox DNS Traffic Control (DTC) provides a load balancing solution by creating DNS responses based on DNS query source IP, server availability, and network topology. Through DTC, you can set up multiple global sites and configure supported objects and load balancing methods to direct DNS clients to the best available servers. For detailed information about how DNS Traffic Control handles DNS queries and responses, see DNS Traffic Control Querying Process below.
To use the DTC feature and bypass the standard DNS querying process, you must install the DNS Traffic Control license on designated Grid members. For information about license and admin requirements, see License Requirements and Admin Permissions. Members that are not authoritative for zones or members that do not have the DTC license installed will not process DNS queries through DTC. However, the appliance can process DNS queries through DNS Traffic Control for secondary servers in the Grid using the data replication method. 
DNS Traffic Control utilizes a load balancing mechanism to create DNS responses. It returns tailored DNS responses based on settings you configure for associated objects such as DTC servers, pools, and LBDNs. For more information about these objects, see Supported DNS Traffic Control Objects below and Managing DNS Traffic Control Objects. You can configure load balancing methods for pools and LBDNs based on the source IP address and other criteria. For more information, see Load Balancing Methods for DNS Traffic Control.
To ensure that DTC servers are reachable and can process DNS queries, you can configure health monitors that help you determine the availability of these servers. For more information, see Using DNS Traffic Control Health Monitors.
After you have set up DNS Traffic Control for specific DTC objects, you can monitor their status as described in the sectionViewing DNS Traffic Control ObjectsViewing DNS Traffic Control Objects. You can also view a visualization of the hierarchy of DNS Traffic Control objects that you configured. For more information, see Visualization for DNS Traffic Control Objects.
You can enable or disable logging for DNS Traffic Control load balancing and health monitors. The appliance logs this information to the syslog. For more information, see Setting DNS Logging Categories.
You can configure the DNS Traffic Control properties for the Grid and Grid members. For more information, see Configuring Configuring DNS Traffic Control Properties.

DNS Traffic Control Configuration Example

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1. Create DNS Traffic Control servers for each data center or server you want to manage. For information, see Configuring DNS Traffic Control Servers Configuring DNS Traffic Control Servers.

2. Optionally, if you want to monitor server health, configure health monitors and add them to your pools when you create them. For information, see Using DNS Traffic Control Health Monitors.

3. Configure any topology rulesets that will be used by DTC pools. For information, see Defining Topology Rulesets.

4. Configure DTC pools, as described in Configuring DNS Traffic Control Pools.

5. Configure any topology rulesets that will be used with LBDNs, as described in Configuring Topology Rules and Rulesets.

6. Configure DTC LBDNs, as described in Configuring DNS Traffic Control LBDNs.

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