This document provides a sample configuration that shows how to set up
a basic wireless LAN (WLAN) connection with the use of a Cisco Aironet Access
Point (AP) and computers with Cisco-compatible client adapters. The example
uses the GUI.
Ensure that you meet these requirements before you attempt this
Familiarity with basic wireless radio frequency (RF)
Basic understanding of how to access a Cisco
This document assumes that the drivers of the wireless client cards for
the PCs or laptops are already installed.
The information in this document is based on these software and
One Aironet 1200 Series AP that runs Cisco IOS® Software Release
Three Aironet 802.11a/b/g Client Adapters that run firmware 2.5
Aironet Desktop Utility (ADU) version 2.5
Note: This document uses an AP that has an integrated antenna. If you use
an AP which requires an external antenna, ensure that the antennas are
connected to the AP. Otherwise, the AP is unable to connect to the wireless
network. Certain AP models come with integrated antennas, whereas others need
an external antenna for general operation. For information on the AP models
that come with internal or external antennas, refer to the ordering
guide/product guide of the appropriate device.
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command or setup in the GUI.
This document uses this network setup:
The network diagram is three Aironet 802.11a/b/g Client Adapters that
are connected to a 1200 AP. This document depicts the configuration of the
client adapters to communicate with each other via wireless interface through
The AP uses these settings:
Service Set Identifier (SSID): CISCO123
Basic authentication: Open authentication with Wired Equivalent
Privacy (WEP) encryption
This document explains the configuration on the AP and the client
You can configure the AP with the use of any of these:
Command-line interface (CLI), after you establish a Telnet
The console port
Note: In order to connect to the AP through the console port, connect a
nine-pin, straight-through DB-9 serial cable to the RS-232 serial port on the
AP and to the COM port on a computer. Set up a terminal emulator in order to
communicate with the AP. Use these settings for the terminal emulator
This document explains how to configure the AP with the use of the
There are two ways to access the AP with the use of the GUI:
Assign an IP address to the device before you connect through the
Obtain an IP address with the use of
The different models of Aironet APs exhibit different default IP
address behaviors. When you connect an Aironet 350, 1130AG, 1200, or 1240AG
series AP with a default configuration to your LAN network, the AP requests an
IP address from your DHCP server. If the AP does not receive an address, it
continues to send requests indefinitely.
When you connect an Aironet 1100 series AP with a default
configuration to your LAN, the AP makes several attempts to get an IP address
from the DHCP server. If the AP does not receive an address, it assigns itself
the IP address 10.0.0.1 for 5 minutes. During this 5-minute period, you can
browse to the default IP address and configure a static address. If after the 5
minutes the AP is not reconfigured, the AP discards the 10.0.0.1 address and
requests an address from the DHCP server. If the AP does not receive an
address, it sends requests indefinitely. If you miss the 5-minute window to
browse to the AP at 10.0.0.1, you can power cycle the AP in order to repeat the
After configuration of the IP address, you can access the AP through
the browser in order to configure the AP to accept client association requests
from the client adapter.
Complete these steps:
In order to access the AP with the GUI and get the Summary Status
window, complete these steps:
Open a web browser and enter 10.0.0.1 in the
Press Tab in order to bypass the Username field
and advance to the Password field.
The Enter Network Password window displays.
Enter the case-sensitive password Cisco, and
The Summary Status window displays, as this example shows:
Click Express Setup in the menu on the
The Express Setup window displays. You can use this window to
configure some of the basic parameters that are necessary to establish a
wireless connection. Use the Express Setup window on the AP 1200 in order to
configure the acceptance of wireless client associations. Here is an example of
Enter the configuration parameters in the appropriate fields in the
Express Setup window.
The configuration parameters include these parameters:
The host name of the AP
IP address configuration of the AP, if the address is a static
Simple Network Management Protocol (SNMP) community
Role in the radio network
This example configures these parameters:
IP address: 10.0.0.1
Host name: AP1200
Note: SSIDs are unique identifiers that identify a WLAN network.
Wireless devices use SSIDs to establish and maintain wireless connectivity.
SSIDs are case-sensitive and can contain up to 32 alphanumeric characters. Do
not use any spaces or special characters in an SSID.
Note: The other parameters are left with the default values.
Click Apply in order to save your
Complete these steps in order to set up the radio settings:
Click Network Interfaces in the menu on the left
in order to browse to the Network Interfaces Summary page.
Select the radio interface that you want to
This example uses interface Radio0-802.11B. The action allows you
to browse to the Network Interfaces: Radio Status page.
Click the Settings tab in order to browse to
the Settings page for the radio interface.
Click Enable in order to enable the
Leave all the other settings on the page with the default
Scroll down and click Apply at the bottom of the
page in order to save the settings.
In order to configure the SSID and open authentication with WEP
encryption, complete these steps:
Choose Security > SSID Manager in the menu on
The SSID Manager page displays.
Select the SSID that you created in Step 3 from the Current SSID
This example uses CISCO123 as the SSID.
Under Authentication Settings, choose Open
Leave all other parameters with their default
Click Apply at the bottom of the
In order to configure the WEP keys, complete these steps:
Choose Security > Encryption
Click WEP Encryption under Encryption Modes, and
choose Mandatory from the drop-down menu.
Enter the encryption key for WEP in the Encryption Keys
The WEP encryption keys can be 40 bits or 128 bits in length.
This example uses the 128-bit WEP encryption key 1234567890abcdef1234567890.
Click Apply in order to save the
Configure the Wireless Client Adapter
Before configuration of the client adapter, you must install the client
adapter and client adapter software components on the PC or laptop. For
instructions on how to install the drivers and utilities for the client
adapter, refer to Installing
the Client Adapter.
After installation of the client adapter on the machine, you can
configure it. This section explains how to configure the client adapter.
Complete these steps:
Create a profile on the ADU for the client adapter.
The profile defines the configuration settings that the client
adapter uses in order to connect to the wireless network. You can configure a
maximum of 16 different profiles on the ADU. You can switch between the
different configured profiles on the basis of your requirement. Profiles enable
you to use your client adapter in different locations, each of which requires
different configuration settings. For example, you may want to set up profiles
to use your client adapter at the office, at home, and in public areas, such as
airports or hot spots.
In order to create a new profile, complete these steps:
Click the Profile Management tab on the
Here is an example:
When the Profile Management (General) window displays, complete
these steps in order to set the Profile Name, Client Name, and SSID:
Enter the name of the profile in the Profile Name
This example uses OFFICE as the Profile
Enter the name of the client in the Client Name
The client name is used to identify the wireless client in the
WLAN network. This configuration uses the name Client 1 for
the first client.
Under Network Names, enter the SSID that is to be used for this
The SSID is the same as the SSID that you configured in the AP.
The SSID in this example is CISCO123.
Complete these steps in order to set up the Security Options:
Click the Security tab at the top of the
Click Pre-Shared Key (Static WEP) under Set
Here is an example:
The Define Pre-Shared Keys window appears.
Click one of buttons in the Key Entry area in order to choose a
key entry type.
This example uses Hexadecimal (0-9,
Under Encryption Keys, enter the WEP key that is to be used for
encryption of the data packets.
This example uses the WEP key 1234567890abcdef1234567890. See the example in Step d.
Note: Use the same WEP key as the one you configured in the
Click OK in order to save the WEP
Complete these steps in order to set the authentication method to
Click the Advanced tab at the top of the Profile
Be sure that Open is selected under 802.11
Note: Open authentication is usually enabled by default.
Leave all the other settings with the default
Click Activate in order to enable this
Note: You can use these same Step-by-Step
Instructions in order to create a completely new profile. In an
alternate method to create a profile, the client adapter scans the RF
environment in order to check for available networks and then creates a profile
on the basis of the scan results. For more information on this method, refer to
a New Profile section of Using
the Profile Manager.
You can use the same procedure in order to configure the other two
client adapters. You can use the same SSID on the other adapters. The only
difference is the client name and the IP address that is statically given to
Note: This example assumes that the client adapter IP address is configured
manually and is in the same subnetwork as the AP.
This section explains how to confirm that your configuration works
When you have completed the configurations and activated the profile,
the client adapter connects to the AP. In order to check the status of the
client connection, click the Current Status tab at the top of
the ADU window.
This example illustrates a successful connection to the AP. You can
see that the client uses Channel 1 for communication and uses WEP for
encryption. Also, since only open authentication is used, the Server Based
Authentication field shows None:
As another method to verify the client connection on the AP, click Association in the menu on the left side of the AP home page.
Here is an example:
If 802.1x authentication is used, and a Cisco Catalyst 2950 or 3750
Switch is present in the network, an 802.1X client might fail to authenticate.
This error message is displayed:
Jul 21 14:14:52.782 EDT: %RADIUS-3-ALLDEADSERVER: Group rad_eap:
No active radius servers found. Id 254
This symptom is observed on 2950 and 3750 Switches when the RADIUS
State(24) Field values change in between the Access Challenge and the Access
Request. This is because of Cisco bug id CSCef50742. This is resolved in Cisco
IOS Software Release 12.3(4) JA. With release 12.3(4)JA, clients no longer fail
802.1X authentication through Cisco Catalyst 2950 and 3750 Switches due to
State (24) Field values that change.