Cisco Aironet Installation And Configuration Manual page 243

Appendix E Configuring the Client Adapter through Windows XP
Step 10 Select the Network Authentication (Shared mode) check box if you want to use shared key, rather than
open, authentication with the access point.
Open authentication allows your client adapter, regardless of its WEP settings, to authenticate and
attempt to communicate with an access point.
Shared key authentication allows your client adapter to communicate only with access points that have
the same WEP key. Cisco recommends that shared key authentication not be used because it presents a
security risk.
Note
Follow the steps below to enter up to four WEP keys, if you are planning to use static WEP.
Step 11
Note
Obtain the WEP key for the access point (in an infrastructure network) or other clients (in an ad hoc
a.
network) from your system administrator and enter it in the Network key field. In order to
communicate, the client adapter must use the same WEP key as the access point or other clients.
Select one of the following WEP key formats:
b.
–
–
Note
Select one of the following WEP key lengths:
c.
–
–
In the Key index (advanced) field, select the number of the WEP key you are creating (0, 1, 2, or 3).
d.
Note
Repeat the previous steps if you want to enter another WEP key.
e.
OL-1394-04
If you are planning to use EAP-TLS authentication, do not select this check box. EAP-TLS
does not work with shared key authentication because shared key authentication requires the
use of a WEP key, and a WEP key is not set for EAP-TLS until after the completion of EAP
authentication.
If you are planning to use EAP-TLS authentication, which uses dynamic WEP, go to
ASCII characters—Specifies that the WEP key will be entered in ASCII text, which includes
alpha characters, numbers, and punctuation marks.
Hexadecimal digits—Specifies that the WEP key will be entered in hexadecimal characters,
which include 0-9, A-F, and a-f.
ASCII text WEP keys are not supported on the Cisco Aironet 1200 Series Access Points,
so you must select the Hexadecimal digits option if you are planning to use your client
adapter with these access points.
104 bits (13 characters/26 digits)—You can select this option (or the 40 bits option) if your
client adapter supports 128-bit WEP.
40 bits (5 characters/10 digits)—You must select this option if your client adapter supports
only 40-bit WEP.
The WEP key must be assigned to the same number on both the client adapter and the
access point (in an infrastructure network) or other clients (in an ad hoc network).
Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows
Configuring the Client Adapter
Step 12.
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