Table Of Contents
Release Notes for Cisco Aironet Client Adapter Firmware, 5.20.17
This document contains the following sections:
This document describes system requirements, important notes, new and changed information, and upgrade procedures for Cisco Aironet client adapter firmware version 5.20.17.
You need the following in order to install client adapter firmware version 5.20.17:
•One of the following Cisco Aironet client adapters:
–340 or 350 series PC, LM, or PCI card
–350 series mini PCI card
–PC-Cardbus (CB20A) card
•A computer running one of the following operating systems:
–Windows 98, 98 SE, NT, 2000, Me, or XP
–Windows CE 3.0, 4.0, or 4.1
•The following client adapter software for your computer's operating system:
–Install Wizard version 1.1 for Windows, which includes PC, LM, and PCI card driver version 8.3; mini PCI and PC-Cardbus card driver version 3.5; ACU version 6.1; ACM version 2.1; LEAP security module version 6.0; PEAP security module version 1.01; and EAP-SIM security module version 1.0
–Driver and client utility version 2.30 for Windows CE
•To ensure compatibility between wireless devices, access points to which your client adapter may attempt to authenticate must use the following software versions or greater: firmware version 12.00T (340, 350, and 1200 series access points) or IOS release 12.2(4)JA (1100 series access points).
Note To use the fast secure roaming feature supported in client adapter firmware version 5.20.17, access points must use IOS release 12.2(11)JA or greater.
Not Supported on Linux and Mac OS Operating Systems
Client adapter firmware version 5.20.17 is not supported for use on Linux and Mac OS operating systems.
Cisco Aironet Software Requires Completion of Encryption Authorization Form
In order to access Cisco Aironet software from the Software Center on Cisco.com, you must fill out a form to receive authorization to download encrypted software. Registered Cisco.com users are required to fill out the form only once, but public users must do so once each session, each time software is downloaded. A form is automatically created for public users. The form for registered Cisco.com users is at the following URL:
New and Changed Information
This section describes new and changed information for Cisco Aironet client adapter firmware version 5.20.17.
Support for Fast Secure Roaming
Some applications that run on a client device may require fast roaming between access points. Voice applications, for example, require seamless roaming to prevent delays and gaps in conversation. Support for fast secure roaming is now available for LEAP-enabled clients in client adapter firmware version 5.20.17.
During normal operation, LEAP-enabled clients mutually authenticate with a new access point by performing a complete LEAP authentication, including communication with the main RADIUS server. However, when you configure your wireless LAN for fast secure roaming, LEAP-enabled clients securely roam from one access point to another without the need to reauthenticate with the RADIUS server. Using Cisco Centralized Key Management (CCKM), an access point that is configured for wireless domain services (WDS) uses a fast rekeying technique that enables client devices to roam from one access point to another in under 150 milliseconds (ms). Fast secure roaming ensures that there is no perceptible delay in time-sensitive applications such as wireless Voice over IP (VoIP), enterprise resource planning (ERP), or Citrix-based solutions.
This feature does not need to be enabled on the client adapter; it is supported automatically in client adapter firmware version 5.20.17. However, it must be enabled on the access point.
Note IOS release 12.2(11)JA or greater is required to enable fast secure roaming on the access point. Refer to the documentation for your access point for instructions on enabling this feature.
Note If the Microsoft 802.1X supplicant is installed on your computer, you must disable one or two Windows parameters in order for this feature to operate correctly. Refer to the "Enabling LEAP" section of the Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows (version OL-1394-06) for details.
Upgrading to a New Firmware Version
Caution To minimize the risk of a power failure during the firmware flashing process, which could render your client adapter inoperable, Cisco recommends that your computer be plugged into AC power or have a fully charged battery at the start of flashing. If a power failure does occur, follow the instructions in the "Obtaining Technical Assistance" section to contact TAC for assistance.
This section describes how to upgrade to client adapter firmware version 5.20.17 on a computer running Windows 98, 98 SE, NT, 2000, Me, or XP.
Note Refer to the Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows CE (version OL-1375-03) for instructions on upgrading the firmware on a Windows CE device. This document is at the following URL:
Finding the Firmware Version
To find the firmware version that your client adapter is currently using, open ACU and click the Status icon. The Firmware Version field on the Status screen shows the firmware version.
Upgrading the Firmware
Follow the steps below to upgrade your client adapter's firmware to version 5.20.17.
Note When you upgrade your client adapter's firmware using ACU, the Automatically Load New Firmware When NDIS Driver Is Updated parameter on the Aironet Client Utility Preferences screen becomes disabled (or unchecked) automatically to prevent the newly loaded firmware from being overwritten by the driver. If you ever want to enable this parameter, you must recheck the check box.
Step 1 Use the computer's web browser to access the following URL:
Step 2 Select Option #2: Aironet Wireless Software Display Tables.
Note You can download software from the Software Selector tool instead of the display tables. To do so, select Option #1: Aironet Wireless Software Selector, follow the instructions on the screen, and go to Step 7.
Step 3 Select Cisco Aironet Wireless LAN Client Adapters.
Step 4 Under Individual Files, find the client adapter firmware.
Step 5 Click the link that corresponds to your client adapter's model number (such as 340 or 350 series).
Step 6 Select the latest firmware file for your specific client adapter type (such as CB or MPI).
Note The firmware for PC, LM, and PCI cards is labeled PCMCIA-LMC-PCI, the firmware for mini PCI cards is labeled mini PCI or MPI, and the firmware for PC-Cardbus cards is labeled CB.
Step 7 Read and accept the terms and conditions of the Software License Agreement.
Step 8 Select the firmware file again to download it.
Step 9 Save the file to a floppy disk or to your computer's hard drive.
Step 10 Find the file using Windows Explorer, double-click it, and extract the image file to a folder.
Note To extract the file, click Browse on the WinZip Self-Extractor screen, select the folder in which you want the file to be placed, and click OK and Unzip. After the file is extracted, click OK to close the screen.
Step 11 Make sure the client adapter is installed in your computer and is operational.
Step 12 Open ACU and click the Load Firmware icon. The Load New Firmware screen appears (see Figure 1).
Figure 1 Load New Firmware Screen
Step 13 Find the location of the new firmware in the Look in box.
Step 14 Click the firmware image file (*.img) so that it appears in the File name box at the bottom of the screen.
Step 15 Click the Open button. A progress bar appears while the selected image is loaded into the client adapter's Flash memory.
Step 16 Click OK when the "Firmware Upgrade Complete!" message appears. The OK button cannot be selected until the process is complete or an error occurs.
Getting Bug Information on Cisco.com
If you are a Cisco registered user, you can use the Cisco TAC Software Bug Toolkit, which consists of three tools (Bug Navigator, Bug Watcher, and Search by Bug ID Number) that help you to identify existing bugs (or caveats) in Cisco software products.
Access the TAC Software Bug Toolkit at the following URL:
For the most up-to-date, detailed troubleshooting information, refer to the Cisco TAC website at
Select Hardware Support > Wireless Devices. Then select your product and Troubleshooting to find information on the problem you are experiencing.
For more information about Cisco Aironet client adapters, refer to the following documents:
•Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows, OL-1394-06
•Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows CE, OL-1375-03
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