Cisco Cisco NAC Appliance 4.9 Release Notes

The following steps summarize how to perform new CD software installation of Release 4.9 on 
supported Cisco NAC Appliance hardware platforms (see 

 for additional support details).

To upgrade on an existing Cisco NAC Appliance, refer to the instructions in 

. 

The click in the NAC is configured with default settings like default priority, CPU usage etc. The driver 
loop of the click thread uses the full CPU whenever other processes are idle. The CPU usage of click can 
reach 99%. As the thread runs with default priority, other processes like tomcat can take over whenever 
requests come for them. The high CPU usage of click will not lead to any performance issues.

With Release 4.9, installation occurs in two phases: 

The software is installed from the CD, and when complete, the CD is ejected from the appliance.

The admin logs in and performs the initial configuration.

If you are going to perform a new installation but are running a previous version of Cisco NAC 
Appliance, Cisco recommends backing up your current Clean Access Manager installation and saving 
the snapshot on your local computer, as described in 

.

Follow the instructions on your welcome letter to obtain product license files for your installation. See 

 for details. (If you are evaluating Cisco Clean Access, visit 

 to obtain an evaluation license.) 

Install the latest version of Release 4.9 on each Clean Access Server and Clean Access Manager, as 
follows:

Log in to the Cisco Software Download Site at 

. 

You will likely be required to provide your CCO credentials.

Navigate to Security > Endpoint Security > Cisco Network Access Control > Cisco NAC 
Appliance > Cisco NAC Appliance 4.9.

Download the latest Release 4.9 .ISO image (e.g. nac-4.9_0-K9.iso) and burn the image as a 
bootable disk to a CD-R.

Cisco recommends burning the .ISO image to a CD-R using speeds 10x or lower. Higher 
speeds can result in corrupted/unbootable installation CDs.

Insert the CD into the CD-ROM drive of each installation server, and follow the instructions in the 
auto-run installer.

After software installation, access the Clean Access Manager web admin console by opening a web 
browser and typing the IP address of the CAM as the URL. The Clean Access Manager License Form 
will appear the first time you do this to prompt you to install your FlexLM license files.

Install a valid FlexLM product license file for the Clean Access Manager (either evaluation, starter kit, 
or individual license).

At the admin login prompt, login with the web console username and password you configured when 
you installed the Clean Access Manager.