If it is any consolation, Cisco has recently confirmed and published it. Cisco has made a great decision to allow ISE v2.4 installation on the SNS-36xx physical appliances. The new 3600s ship with ISE v2.6. Which at this time, is not the recommended release for production deployments. A few steps are required and have been detailed in the administration guide. •Create a bootable USB device using the installation .iso file and boot the SNS-36xxx appliance from the USB drive. See Create a Bootable USB Device to Install Cisco ISE and Install Cisco ISE Using CIMC for more information. Documentation links to: https://www.cisco.com/c/en/us/td/docs/security/ise/2-3/install_guide/b_ise_InstallationGuide23/b_ise_InstallationGuide23_chapter_011.html#ID-1417-00000271 NOTE: For Cisco Secure Network Server (SNS) 3600 series appliance support (SNS-3615-K9, SNS-3655-K9, and SNS-3695-K9), you must use only the new ISO file (ise-2.4.0.357.SPA.x86_64_SNS-36x5_APPLIANCE_ONLY.iso). Cisco ISE 2.4 Patch 9 or above must be applied after installation. We recommend that you do not use this ISO file for SNS 3500 series appliance, VMware, KVM, or Hyper-V installation. Have questions or something to add? I am working through this process, let’s collaborate! ... View more