Cisco 802.11 Wireless Networking Quick Reference

234 Troubleshooting Checklist

Step 5. Uncheck the Use automatic settings check box.

Step 6. Under Resource Settings, click I/O Range.

Step 7. In the Conflicting Device list, check to see if the range is used by another

device, and then click the Change Setting button.

Step 8. Choose a range that does not conflict with the device. The Conflict Informa-

tion pane at the bottom of the window shows if the range is already being

used.

Step 9. Click OK.

Step 10. Under Resource Settings, click IRQ.

Step 11. Examine the Conflicting Device list at the bottom of the window. If an IRQ

setting is used by another device, click the Change Setting button.

Step 12. Choose an IRQ in the Value dialog box and select one that does not conflict

with the device. The Conflict Information pane at the bottom of the window

shows if the IRQ is already being used.

Step 13. Click OK.

Step 14. Reboot your computer. (This is required.)

As you have seen in this and previous chapters, wireless networks combine many of

the issues germane to a wired network, along with the specialized characteristics of

radio transmission and reception. Successfully troubleshooting these networks

requires you to balance the two disciplines.

Troubleshooting Checklist

If your client has problems associating to any of your APs, try the following:

❑ If the client is a laptop, palmtop, or other portable device, try to move it closer to

the AP.

❑ Make sure the adapter is securely seated in the computer’s adapter slot. Remove

and reinsert the adapter to ensure it is properly seated.

❑ Make sure the antenna is properly attached. (This is especially important for

desktop PCs with a removable antenna.)

❑ Confirm that the AP is turned on and runs properly.

❑ Double-check your settings on both the client and AP. Parameters to check

include:

— SSID

— EAP authentication