Siemens EF 711 Series Podręcznik Użytkownika Strona 23

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Overview of the SCALANCE WLC711 Solution
SCALANCE WLC711 and Your Network
SCALANCE WLC711
User Guide, V8.11, 07/2012, C79000-G8976-C260-03 1-7
Zone Integrity — The Zone integrity server enhances network security by ensuring clients
accessing your network are compliant with your security policies before gaining access. Zone
Integrity Release 5 is supported.
Network Traffic Flow
Figure 1-3 illustrates a simple configuration with a single SCALANCE IWLAN Controller and two
Wireless APs, each supporting a wireless device. A RADIUS server on the network provides
authentication, and a DHCP server is used by the Wireless APs to discover the location of the
SCALANCE IWLAN Controller during the initial registration process. Network inter-connectivity
is provided by the infrastructure routing and switching devices.
Figure 1-3 Traffic Flow Diagram
Each wireless device sends IP packets in the 802.11 standard to the Wireless AP. The Wireless AP
uses a UDP (User Datagram Protocol) based tunnelling protocol. In tunneled mode of operation, it
RADIUS
Authentication
Server
External
CP Server
External Web
Authentication
Server
DHCP
Server
Wireless Devices
Router/Switch
Wireless
Controller
Wireless APs
Packet transmission
Control and Routing
>WLC authenticates wireless user
>WLC forwards IP packet to wired
network
Tunnelling
>AP sends data traffic to WLC
through UDP tunnel called
WASSP
>WLC controls Wireless AP
through WASSP tunnel
>Using WASSP tunnels, WLC
allows wireless clients to roam to
Wireless APs on different WLCs
802.11 packet transmission
802.11 beacon and probe,
wireless device associates
with a Wireless AP
by its SSID
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