ISE does not interoperate with Cisco Secure ACS deployments. The Cisco Identity Services Engine can work in tandem with Cisco NAC Manager to provide the same profiling service as the NAC Profiler, which has reached end-of-sale status.
Existing Cisco Secure ACS customers using network access can easily migrate to the Cisco Identity Services Engine platform using migration part numbers and tools. However, existing Cisco Secure ACS customers using TACACS functions will not be able to migrate to the current version of ISE for network device identity management which is often acceptable for customers who prefer to keep user and network identity on separate systems.
