User's Guide

Table Of Contents
Configuring Mobility
hwc_mobility.fm
Mobility domain topologies
9034530-02, March 2010
408 HiPath Wireless Controller, Access Points and Convergence Software V7.11, User Guide
Figure 27 Mobility Domain with fast failover and session availability features
The user’s home session is with HWC1.
When the user roams from Wireless AP 1 to Wireless AP 2, he establishes
his home session with HWC2.
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 HWC1 for that user.
In response to the heart beat message from the mobility manager (HWC3),
the HWC2 sends updates that the user has a new home on HWC2. 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 in order to enable the mobility manager to update
its tables quickly.
If a failover takes place, and the user is still associated with Wireless AP1:
The Wireless AP 1 fails over, and establishes an active session with
HWC2.
• HWC1 and HWC2
are configured for
session availability.
• HWC1, HWC2,
HWC3, Wireless
AP1, Wireless AP2
and Wireless AP3
form a Mobility
Domain
• HWC3 is the
Mobility Manager
whereas HWC1 and
HWC2 are Mobility
Agents