Finding Version Numbers

Step 1 Use your computer’s web browser to access the following URL:

http://www.cisco.com/cgi-bin/tablebuild.pl/aironet_hotfix

Step 2 If prompted, enter your Cisco Connection Online (CCO) username and password, and click OK.

Note To create a CCO username and password, visit http://www.cisco.com.

Step 3 Click the hot fix file (userenv.zip).

Step 4 Complete the encryption authorization form and click Submit.

Step 5 Click the file again to download it.

Step 6 Save the file to your computer’s hard drive.

Step 7 Find the file using Windows Explorer, double-click it, and extract its files to a folder.

Step 8 Reboot your computer and press F8 while your computer is booting.

Step 9 When the boot menu appears, select Safe Mode with Command Prompt.

Note You must complete this procedure in safe mode; otherwise, system file protection (SFP) will silently restore the original version of the file you are replacing.

Step 10 Copy the hot fix file (userenv.dll) to %systemroot%\System32 and overwrite the existing version of this file.

Step 11 Delete the copy of userenv.dll in %systemroot%\System32\DllCache.

Step 12 Restart your computer.

Follow the instructions in this section to find the version numbers of your client adapter’s software components.

Finding the Driver Version

To find the driver version that is currently installed for your client adapter, open ADU, click the Diagnostics tab, and click Adapter Information. The Driver Version field on the Adapter Information window shows the current driver version.

Finding the Version of ADU and Other Software Components

To find the version of ADU and other software components installed for your client adapter, open ADU and choose the About Aironet Desktop Utility option from the Help drop-down menu. The About window shows the current version of the following software components: ADU, ACAU, the authentication supplicant, the protocol driver, and the Windows NDIS miniport driver.

Release Notes for Cisco Aironet 802.11a/b/g Client Adapters (CB21AG and PI21AG) Install Wizard 3.0

24	OL-8338-01

CB21AG and PI21AG specifications

Cisco Systems is renowned for its innovative networking solutions, and the CB21AG and PI21AG are significant additions to its portfolio, designed to enhance connectivity in diverse environments.

The Cisco CB21AG is a compact and versatile 802.11a/b/g/n wireless access point tailored for mission-critical applications. One of its standout features is its dual-band capability, operating simultaneously on both the 2.4 GHz and 5 GHz bands. This flexibility facilitates enhanced performance, allowing users to optimize their wireless networks to better meet the specific demands of various devices.

Incorporating advanced technologies such as Cisco CleanAir, the CB21AG intelligently identifies and mitigates sources of interference, ensuring a more reliable wireless experience. This feature not only enhances the quality of area coverage but also provides better performance metrics for users. Furthermore, the CB21AG supports Power over Ethernet (PoE), allowing easier installation and placement by eliminating the need for additional power sources.

On the other hand, the Cisco PI21AG is an equally robust offering, designed for wireless deployments in diverse industries, including retail, healthcare, and education. The PI21AG extends the benefits of dual-band connectivity to provide seamless roaming capabilities, crucial for environments where users frequently move between access points.

The PI21AG is equipped with advanced security features that safeguard the network against unauthorized access and breaches. This includes WPA3 security protocols, which enhance encryption and improve overall security. Additionally, it supports advanced network management capabilities, enabling IT departments to monitor performance metrics and make real-time adjustments to optimize user experience.

Both the CB21AG and PI21AG are designed with scalability in mind, ensuring they can grow with an organization’s needs. Their lightweight designs facilitate easy mounting in various locations, ensuring that users can obtain the best possible connectivity regardless of their environment.

In conclusion, the Cisco CB21AG and PI21AG represent state-of-the-art wireless access solutions, with key features that address the needs of modern networking demands. Their robust design, advanced technologies, and strong security measures make them excellent choices for organizations looking to enhance their wireless capabilities, ensuring reliable and efficient connectivity.