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Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide
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Chapter10 Troubleshooting Troubleshooting the Client Adapter
Resolving Resource Conflicts
If you encounter problems while installing your client adap ter on a com pute r run ning a Windows
operating system, you may need to specify a different interrupt request (IRQ) or I/O range for the
adapter.
The default IRQ for the client adapter is IRQ 10, which may not work for all systems. Follow the steps
for your specific operating system to obtain an available IRQ.
During installation the adapter’s driver installation script scans for an unused I/O range. The installation
can fail if the I/O range found by the driver installation script is occupied by another device but not
reported by Windows. An I/O range might not be reported if a device is physically pre sent in the system
but not enabled under Windows. Follow the steps for your specific operating system to obtain an
available I/O range.

Resolving Resource Conflicts in Windows 2000

Step1 Double-click My Computer, Control Panel, and System.
Step2 Click the Hardware tab and Device Manager.
Step3 Double-click Network Adapters and the Cisco Systems Wireless LAN Adapter.
Step4 In the General window, the Device Status field indicates if a resource problem exists. If a problem is
indicated, click the Resources tab.
Step5 Uncheck the Use automatic settings check box.
Step6 Under Resource Settings or Resource Type, click Input/Output Range.
Step7 Look in the Conflicting Device list at the bottom of the window. If it indicates that the range is being
used by another device, click the Change Setting button.
Step8 Scroll through the ranges in the Value dialog box and choose one that does not conflict with another
device. The Conflict Information window at the bottom of the window indicates if the range is already
being used.
Step9 Click OK.
Step10 Under Resource Settings or Resource Type, click Interrupt Request.
Step11 Look in the Conflicting Device list at the bottom of the window. If it indicates that the IRQ is being used
by another device, click the Change Setting button.
Step12 Scroll through the IRQs in the Value dialog box and choose one that does not conflict with another
device. The Conflict Information window at the bottom of the window indicates if the IRQ is already
being used.
Step13 Click OK.
Step14 Reboot your computer.