Siemens EF 711 Series Betriebsanweisung PDF herunterladen (Seite 385)

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SCALANCE WLC711

User Guide, V8.11, 07/2012, C79000-G8976-C260-03 13-1

Configuring Mobility

This chapter describes the mobility concept, including:

Mobility Overview

The SCALANCE WLC711 system allows up to 12 SCALANCE IWLAN Controllers on a network

to discover each other and exchange information about a client session. This technique enables a

wireless device user to roam seamlessly between different Wireless APs on different SCALANCE

IWLAN Controllers.

The solution introduces the concept of a mobility manager; one SCALANCE IWLAN Controller

on the network is designated as the mobility manager and all others are designated as mobility

agents.

The wireless device keeps the IP address, and the service assignments it received from its home

SCALANCE IWLAN Controller—the SCALANCE IWLAN Controller that it first connected to.

The WLAN Service on each SCALANCE IWLAN Controller must have the same SSID and RF

privacy parameter settings.

You have two options for choosing the mobility manager:

• Rely on SLP with DHCP Option 78

• Define at the agent the IP address of the mobility manager. By explicitly defining the IP

address, the agent and the mobility manager are able to find each other directly without using

the SLP discovery mechanisms. Direct IP definition is recommended to provide tighter control

of the registration steps for multi-domain installations.

The SCALANCE IWLAN Controller designated as the mobility manager:

• Is explicitly identified as the manager for a specific mobility domain. Agents will connect to

this manager to establish a mobility domain.

• Defines at the agent the IP address of the mobility manager, which allows for the bypass of

SLP. Agents directly find and attempt to register with the mobility manager.

• Uses SLP, if this method is preferred, to register itself with the SLP Directory Agent as

SiemensNet.

For information about... Refer to page...

Mobility Overview 13-1

Mobility Domain Topologies 13-3

Configuring a Mobility Domain 13-4

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