The Cisco ISE Passive Identity Connector is supported in virtual environments and are modeled after two physical appliances. Those appliances are based on the SNS-3515 and SNS-3595. The scaling for the Cisco ISE Passive Identity Connector is based on the size of the virtual machine. An SNS-3515 virtual machine can support up to 100,000 sessions. An SNS-3595 virutal machine can support up to 300,000 sessions. The specifications for the SNS-3515 and SNS-3595 are as follows: