Siemens EF 711 Series Podręcznik Użytkownika Strona 207

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Configuring WLAN Services
Configuring Privacy
SCALANCE WLC711
User Guide, V8.11, 07/2012, C79000-G8976-C260-03 6-11
WPA Key Management Options
Wi-Fi Protected Access (WPA v1 and WPA v2) privacy offers you the following key management
options:
None — The wireless client device performs a complete 802.1x authentication each time it
associates or tries to connect to a Wireless AP.
Opportunistic Keying — Opportunistic Keying or opportunistic key caching (OKC) enables
the client devices to roam fast and securely from one Wireless AP to another in 802.1x
authentication setup.
The client devices that run applications such as video streaming and VoIP require rapid
reassociation during roaming. OKC helps such client devices by enabling them to rapidly
reassociate with the Wireless APs. This avoids delays and gaps in transmission and thus helps
in secure fast roaming (SFR).
Note:
The client devices should support OKC to use the OKC feature in the Siemens WLAN.
Pre-authentication — Pre-authentication enables a client device to authenticate
simultaneously with multiple Wireless APs in 802.1x authentication setup. When the client
device roams from one Wireless AP to another, it does not have to perform the complete
802.1x authentication to reassociate with the new Wireless AP as it is already pre-
authenticated with it. This reduces the reassociation time and thus helps in seamless roaming.
Note:
The client devices should support pre-authentication to use the pre-authentication feature in Siemens WLAN.
Opportunistic Keying & Pre-auth — Opportunistic Keying and Pre-auth options is meant for
environments where device clients supporting either authentication method (OKC or Pre-
Auth) may be expected. The method that is used in each case is up to the individual client
device.
Configuring WLAN Service Privacy
To Configure Privacy:
1. If the WLAN Service configuration page is not already displayed, from the top menu, click
VNS Configuration. Then, in the left pane, select WLAN Services. The WLAN Services
window displays.
2. Select the desired service to edit from the left pane. The WLAN Service configuration page is
displayed.
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