A Sync-Failover device group with two members and two traffic groups provides configuration synchronization and device failover. It can also provide connection mirroring between the two devices.
Application traffic in a Sync-Failover device group is processed by IP addresses that are configured to float from one device to the other. The floating IP addresses are assigned to a traffic group that resides on each device in the group. The traffic group is active on only one device at a time.
If the active device goes offline, the traffic group becomes active on a Sync-Failover peer in the group and application processing is handled by that device. The process of taking over these functions is known as failover.
Each BIG-IP device in a device group has a default traffic group (traffic group 1). Floating IP addresses are assigned to traffic group 1 and that traffic group processes application traffic.
To process traffic for additional applications with Sync-Failover capability, create a second device group and a second traffic group.
Use the tasks in this implementation to create a new device group to which you can assign a second traffic group. In this active-active configuration, each device in the group has one active traffic group.
Verify that the following configuration objects are defined on each device in the device group.
This task causes the selected traffic group on the local device to switch to a standby state. By forcing the traffic group into a standby state, the traffic group becomes active on another device in the device group. For device groups with more than two members, you can choose the specific device to which the traffic group fails over. This task is optional.
You now have a Sync-Failover device group set up with an active-active configuration. In this configuration, each traffic group is initially configured to be active on one device. If one device goes offline, the traffic group that was active on that device becomes active on the other device in the group. Application processing for both traffic groups continues without interruption.