Did a little more "lite" reading: Features That May Change With Upgrade
- When upgrading a VPN SSO Cisco NAC Appliance network to release 4.7(0), user login does not work properly *when the user VPN is part of a managed subnet on the CAS*. - If your previous deployment uses a chain of SSL certificates that is incomplete, incorrect, or out of order, CAM/CAS communication may fail after upgrade to release 4.5 and later. You must correct your certificate chain to successfully upgrade. The upgrade doesn't look that horrible to be honest. The Kernel looks like it's upgraded via a RPM. This is the procedure via the release notes: *Step 1 *Insert the CD into the CD-ROM drive of each CAM you want to upgrade. *Step 2 *Perform a "clean" or "graceful" shutdown on the CAM by logging into the CAM console CLI as "root" and entering reboot. *Step 3 *Choose option 2 at the following prompt: Checking for existing installations. Clean Access Server 4.6.1 installation detected. Please choose one of the following actions: 1) Install. 2) Upgrade. 3) Exit. *Step 4 *Wait for the upgrade to complete. This will take several minutes** ...stopping CCA Manager... Welcome to the CCA Manager migration utility. ...Upgrading to newer rpms of 4.7.0...done. ...Upgrading CCA files...done Windows Agent version upgraded to 4.7.1.15. Mac Agent was upgraded to version 4.7.0.2. Clearing Tomcat cache...checking ssl configuration...done. [r...@cam1]# *Step 5 *When upgrade is done, reboot the CAM at the prompt: reboot **NOTE* The NACAgentCFG.xml Agent configuration XML file packaged with the Cisco NAC Agent is not preserved after upgrading from release 4.6(1) to 4.7(0). You must manually re-import the Agent configuration XML file to maintain client machine login behavior.*
