Cisco Systems DL-2159-05 manual Checking Basic Settings, WEP Keys, 13-34

Chapter 13 Diagnostics and Troubleshooting

Checking Basic Settings

Checking Basic Settings

Mismatched basic settings are the most common causes of lost connectivity with wireless clients. If the access point does not communicate with client devices, check the following settings.

SSID

Wireless clients attempting to associate with the access point must use the same SSID as the access point. The default SSID is tsunami.

WEP Keys

The WEP key you use to transmit data must be set up exactly the same on your access point and any wireless devices with which it associates. For example, if you set WEP Key 3 on your wireless LAN adapter to 0987654321 and select it as the transmit key, you must also set WEP Key 3 on the access point to exactly the same value. The access point does not need to use Key 3 as its transmit key, however.

Note If you use Network-EAP as the authentication type, you must select key 1 as the access point’s transmit key. The access point uses the WEP key you enter in key slot 1 to encrypt multicast data signals it sends to EAP-enabled client devices. Because the access point transmits the WEP key used for multicast messages to the EAP-enabled client device during the EAP authentication process, that key does not have to appear in the EAP-enabled device’s WEP key list. The access point uses a dynamic WEP key to encrypt unicast messages to EAP-enabled clients.

Refer to the SETTING UP WEP CHP 8 for instructions on setting the access point’s WEP keys.

EAP Authentication Requires Matching 802.1x Protocol Drafts

Note This section applies to wireless networks set up to use LEAP. If you do not use LEAP on your wireless network, you can skip this section.

Wireless client devices use Extensible Authentication Protocol (EAP) to log onto a network and generate a dynamic, client-specific WEP key for the current logon session. If your wireless network uses WEP without EAP, client devices use the static WEP keys entered in the Aironet Client Utilities.

If you use Network-EAP authentication on your wireless network, your client devices and access points must use the same 802.1x protocol draft. For example, if the radio firmware on the client devices that will associate with an access point or bridge is 4.16, then the access point or bridge should be configured to use Draft 8 of the 802.1x protocol. Table 13-4lists firmware versions for Cisco Aironet products and the draft with which they comply.

	Cisco Aironet 1200 Series Access Point Software Configuration Guide
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