The ACI fabric provides for integration of L4-L7 services as an integral part of an application. This is accomplished through the use of an APIC-managed service graph, which requires a L4-L7 device package. The imported device package exposes configuration parameters in APIC, and allows it to orchestrate a given configuration onto the device.
To install the L4-L7 service graph, register a L4-L7 device with the APIC, add its configuration as part of a Function Profile or L4-L7 Service Parameters, and link those two with a service graph. Once you apply this L4-L7 service graph to a contract, the APIC renders it in the fabric by tagging device interfaces and stitching them to appropriate consumer and provider EPGs. The APIC then applies a given configuration to the registered device in an automated fashion. Once all of the configuration is applied to the ACI fabric and the L4-L7 device, the ACI fabric directs traffic defined by the contract to a given device for inspection. The ACI also allows you to chain multiple services together under a single service graph.