Device service clustering, or DSC, is an underlying architecture within BIG-IP Traffic Management Operation System (TMOS), based on F5 Networks' ScaleN technology. DSC provides synchronization and failover of BIG-IP configuration data at user-defined levels of granularity, among multiple BIG-IP devices on a network. More specifically, you can configure a BIG-IP device on a network to:
If you have two BIG-IP devices only, you can create either an active-standby or an active-active configuration. With more than two devices, you can create a configuration in which multiple devices are active and can fail over to one of many, if necessary.
By setting up DSC, you ensure that BIG-IP configuration objects are synchronized and can fail over at useful levels of granularity to the most-available BIG-IP devices on the network. You also ensure that failover from one device to another, when enabled, occurs seamlessly, with minimal to no interruption in application delivery.
The BIG-IP system supports either homogeneous or heterogeneous hardware platforms within a device group.
Device service clustering (DSC) is based on a few key components.
F5 Networks recommends that you follow these best practices when deploying a DSC configuration: