Cisco AIR-PI21AG 802.11a/b/g PCI Card Driver Download

Cisco Systems Drivers

The AIR-PI21AG 802.11a/b/g PCI Card is a network device manufactured by Cisco Systems. Issues like weak Wi-Fi signal, slow DNS lookup, duplicate IP addresses, slow network and excessive CPU usage can be solved by updating this driver. This driver - "CiscoAirOnet21cd.zip" - has been downloaded 14,911 times and is rated 5 out of 5 stars based on 113 reviews. Our users report success installing this driver update on PCs running Windows XP. The total disk space used for this update is 7.1 MB.

113 Ratings (see all reviews)
14,911 Downloads

Supported Models

AIR-CB21AG 802.11a/b/g PC-Cardbus Card

AIR-PI21AG 802.11a/b/g PCI Card

Manufacturers

Cisco

Supported Operating Systems

Windows 2003, Windows XP, Windows 2000, Windows 98SE

File Name

Additional Notes

Cisco wireless drivers are hard to get. This is off of the installation cd that came with cisco a,b,g pcmcia wireless card. Read the readme, it may help you down the road : )

Uploaded By

J.A. Stuart (DG Member) on 9-Jul-2006

Most Helpful Reviews

 
7 of 8 people found the following review helpful:
marsto
Tested on Windows XP
14 Feb 2009
 

Installation: 3 out of 5
Stability: 4 out of 5
Compatibility: 4 out of 5
 
"in XP sp2 works excellent as long as you use the Cisco Utility to configure the device, NOT a 3rd party (Windows) to do so. Used in the PCI card version of the device."
spacer
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5 of 6 people found the following review helpful:
Stefan
Tested on Windows 98SE
16 Oct 2008
(1 hour after download)
 

Installation: 1 out of 5
Stability:  out of 5
Compatibility:  out of 5
 
"Hmm first msg in 98se: This program cannot be run on this kind of platform"
spacer
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5 of 6 people found the following review helpful:
Brad
Tested on Windows 2000 Professional
29 Jul 2008
(18 minutes after download)
 

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
 
"Installed on a old celeron laptop running 2000 pro and is working better with our 2wire (uverse) router than the pcmcia adapter that they gave us (also 2wire). Didn't detect what sort of encryption the AP had, but was very easy to do and connected instantly.

peace"

spacer
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5 of 6 people found the following review helpful:
CAZE
Tested on Windows XP
29 Jul 2008
(3 months after download)
 

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
 
"easy to get the driver i was looking for.

thank you"

spacer
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5 of 6 people found the following review helpful:
Richard
Tested on Windows XP
11 Mar 2008
 

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
 
"Your not wrong when you say these drivers are difficult to obtain. Been looking for them for about 8months. Thanks for whoever posted them here. Installed the cardbus, driver only and presto, wlan access."
spacer
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See all Cisco AIR-PI21AG 802.11a/b/g PCI Card ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
FileList.txt 678 bytes 24 Jun 2005
Regulatory.pdf 1.0 MB 24 Jun 2005
WinClient-802.11a-b-g-Ins-Wizard-v21.exe 6.4 MB 24 Jun 2005
really_readme.txt 641 bytes 9 Jul 2006

How to Update AIR-PI21AG 802.11a/b/g PCI Card Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the AIR-PI21AG 802.11a/b/g PCI Card driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Cisco AIR-PI21AG 802.11a/b/g PCI Card into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Cisco Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Cisco website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

This website is not affiliated with Cisco. All company names/logos are properties of their owners.
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