
Configuring Mobility
Mobility Domain Topologies
SCALANCE WLC711
User Guide, V8.11, 07/2012, C79000-G8976-C260-03 13-3
Mobility Domain Topologies
You can configure a mobility domain in the following scenarios:
• Mobility domain without any availability
• Mobility domain with availability
• Mobility domain with session availability
Note:
If you are configuring mobility, you must synchronize time on all the SCALANCE IWLAN Controllers that are
part of the mobility domain. For more information, see “Configuring Network Time” on page 2-49.
Figure 13-1 Mobility Domain with Fast Failover and Session Availability Features
• The user’s home session is with Controller1.
• When the user roams from Wireless AP 1 to Wireless AP 2, he establishes his home session
with Controller2.
• When the user roams, the Wireless AP 1 receives a notification that the user has roamed away
following which it marks the user session as “inactive”. Consequently, no statistics are sent to
the Controller1 for that user.
• In response to the heart beat message from the mobility manager (Controller3), the
Controller2 sends updates that the user has a new home on Controller2. Upon receiving the
updates, the mobility manager updates its own tables.
Note:
The mobility manager’s heart beat time is configurable. If you are configuring a mobility domain with session
availability, you should configure the heart beat time as one second to enable the mobility manager to update
its tables quickly.
• Controller1 and
Controller 2 are
configured for
session availability.
• Controller1,
Controller2,
Controller3, Wireless
AP1, Wireless AP2
and Wireless AP3
form a Mobility
Domain
• Controller3 is the
Mobility Manager
whereas Controller1
and Controller2 are
Mobility Agents
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