Q. When you use Light Extensible Authentication Protocol (LEAP), what
port number do you specify in order to communicate with your Cisco
Secure Access Control Server (ACS)?
A. By default, the ACS listens to an authentication request on port 1645 and accounting on
port 1646, but you can configure port 1812 for authentication and 1813 for accounting.
Confirm that these ports are correctly set on the Authentication Server Setup page on the AP.
Q. In Cisco IOS Software−based APs, can you run static Wired
Equivalent Privacy (WEP) keys and Extensible Authentication Protocol
(EAP) together on the same AP for authentication? This has worked with
VxWorks−based APs.
A. No, you cannot run static WEP keys for encryption and EAP for authentication in the same
service set identifier (SSID). VxWorks has allowed this configuration because of software
vulnerability, but this ability is not a feature. What you can do is create two SSIDs and two
VLANs (one per SSID). Then, configure open authentication with WEP for one SSID and
EAP authentication for the other SSID.
Q. Do you really need to have a site survey done?
A. Yes. Because of the sensitive nature of radio frequency (RF) transmissions, you must
know the other types of RF traffic that can be in your environment, even without your
knowledge of the traffic presence. A site survey enables a better understanding of this
invisible threat to the good performance of your wireless devices. The site survey also helps
your professional installer ensure the desired RF coverage. Refer to the Wireless Site Survey
FAQ.
Q. If you attempt to modify the AP and you are prompted for a username
and password, what do you enter?
A. A prompt for username and password indicates that the User Manager has been enabled.
Refer to your AP administrator in order to find out the username and password to use. If you
are the AP administrator and do not know what these user accounts are, you need to perform a
password recovery. Refer to Password Recovery Procedure for the Cisco Aironet Equipment.
Q. Can you use two external antennas in order to cover two radio cells
(for example, antenna 1 for cell 1 and antenna 2 for cell 2)?
A. You cannot use two antennas on an AP in order to cover two radio cells. Attempts to use
the antennas to cover two radio cells can result in connectivity problems. The purpose of the
two antennas is to enhance the coverage of a cell in an effort to overcome issues that arise
with multipath distortion and signal nulls. Refer to Multipath and Diversity for more
information on diversity and multipath distortions.
Q. What is the use of the mobility network−id command on an AP?
A. You use the mobility network−id command in order to configure Layer 3 mobility in a
wireless network. You use the mobility network−id ssid command in order to associate a
service set identifier (SSID) to a Layer 3 mobility network ID. With Layer 3 mobility, clients
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