In prior releases, a designated “Headend” SBC was used to configure SBC SWe clusters. Beginning with SBC release 8.0, the OAM node and Direct Single configuration models replace the Headend model. Refer to SBC SWe Configuration Management for an overview of these models. To enable migration to one of the new models, Insight EMS 12.x continues to support the Headend configuration model for SBC clusters on prior releases. However SBC SWe clusters on release 8.0 or later must use either the OAM node or Direct Single configuration model.