A traffic group
is a collection of related configuration objects that run on a BIG-IP device. Together, these objects process a particular type of traffic on that device. When a BIG-IP device becomes unavailable, a traffic group can float to another device in a device group to ensure that the traffic for that application continues to be processed with little to no interruption in service. In general, a traffic group ensures that when a device becomes unavailable, all of the failover objects in the traffic group fail over to any one of the devices in the device group, based on the current workload of those devices.
Only certain types of configuration objects can belong to a traffic group.
Examples of traffic group objects are floating self IP addresses and floating virtual IP addresses.
Another example of a type of object in a traffic group is an iAppsTM
application service. If a device with this traffic group is a member of a device group and the device becomes unavailable, the traffic group floats
, or fails over, to another member of the device group, and that member becomes the device that processes the application traffic.
When a traffic group fails over to another device in the device group, the
device that the system selects to run the traffic group is normally the device that is most available from a workload perspective. However, when you initially create the traffic group on a device, you can specify the device in the group that you prefer that traffic group to run on whenever possible.