User's Manual Part 2

BETA DRAFT - CISCO CONFIDENTIAL
E-6
Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for Windows
OL-1394-03
Appendix E Configuring the Client Adapter through Windows XP
Configuring the Client Adapter
Step 10 Select the Network Authentication (Shared mode) checkbox 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 If you are planning to use EAP-TLS authentication, do not select this checkbox. 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.
Step 11 Follow the steps below to enter up to four WEP keys, if you are planning to use static WEP.
Note If you are planning to use EAP-TLS authentication, which uses dynamic WEP, go to Step 12.
a. Obtain the WEP key for the access point (in an infrastructure network) or other clients (in an ad hoc
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.
b. Select one of the following WEP key formats:
– 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.
c. Select one of the following WEP key lengths:
– 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.
d. In the Key index (advanced) field, select the number of the WEP key you are creating (0, 1, 2, or 3).
Note 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).
e. Repeat the previous steps if you want to enter another WEP key.
Step 12 Select the The key is provided for me automatically checkbox if you are planning to use EAP-TLS,
which uses dynamic WEP keys.
Step 13 Select the This is a computer-to-computer (ad hoc mode) network; wireless access points are not
used checkbox if you are planning to operate the client adapter in an ad hoc network.