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Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide for Windows Vista
OL-16534-01
Chapter 2 Configuring Wireless Profiles
Accessing a Profile That Was Created Previously
CCKM Fast Secure Roaming
Some applications that run on a client device may require fast roaming between access points. Voice
applications, for example, require it to prevent delays and gaps in conversation. CCKM fast secure
roaming is enabled automatically for CB21AG and PI21AG clients using WPA/WPA2/CCKM with
LEAP, EAP-FAST, EAP-TLS, PEAP (EAP-GTC), or PEAP (EAP-MSCHAP V2). However, this feature
must be enabled on the access point.
During normal operation, EAP-enabled clients mutually authenticate with a new access point by
performing a complete EAP authentication, including communication with the main RADIUS server.
However, when you configure your wireless LAN for CCKM fast secure roaming, EAP-enabled clients
securely roam from one access point to another without the need to reauthenticate with the RADIUS
server. Using Cisco Centralized Key Management (CCKM), an access point that is configured for
wireless domain services (WDS) uses a fast rekeying technique that enables Cisco client devices to roam
from one access point to another typically in under 150 milliseconds (ms). CCKM fast secure roaming
ensures that there is no perceptible delay in time-sensitive applications such as wireless Voice over IP
(VoIP), enterprise resource planning (ERP), or Citrix-based solutions.
Accessing a Profile That Was Created Previously
After you have created a profile and configured its basic settings (see the “Creating a New Profile and
Configuring Basic Settings” section on page 2-3), you can change the settings by accessing the
properties of the profile.
To access the profile, follow these steps:
Step 1 Open the Network and Sharing Center (see the “Accessing Microsoft Vista Network and Sharing Center”
section on page 2-2).
Step 2 In the Network and Sharing window (see Figure 2-7), click Manage wireless networks in the Tasks
area.