Appendix B: Troubleshooting

Check the following first:

Make sure that the power of the advanced AP is on and the Ethernet cables are connected firmly to the RJ-45 jacks of the advanced AP.

Make sure that the LED ALV of the advanced AP is blinking to indicate the advanced AP is working.

Make sure the types of the Ethernet cables are correct. Recall that there are two types—normaland crossover.

B-1: Wireless Settings Problems

The wireless client computer cannot link to an access point. Is the wireless client set in infrastructure mode?

Check the operating mode of the WLAN NIC.

Is the SSID of the WLAN NIC identical to that of the prospective access point or advanced AP?

Check the SSID setting of the WLAN NIC and of the advanced AP.

Is the WEP functionality of the prospective access point or advanced AP enabled?

Make appropriate WEP settings of the client computer to match those of the access point or advanced AP.

Is the prospective access point or advanced AP within range of wireless communication? Check the signal strength and link quality sensed by the WLAN NIC.

B-2: TCP/IP Settings Problems

Correspondent

Host

IEEE 802.11b

Internet

Ethernet LAN

 

 

 

Stage A

 

 

State B

 

 

Stage D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Client

Advanced

 

Default Gateway

DNS Server

Computer

AP

 

of Client Computer

of Client Computer

Fig. 26. Communication stages for a client to reach its correspondent host.

100-408-01

Copyright © 2002 Madge Networks. All rights reserved.

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