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Nortel WLAN—Security Switch 2300 Series Configuration Guide

Configuring and managing Mobility

Domain roaming

A Mobility Domain is a system of WSSs and APs working together to support roaming wireless users (clients). Tunnels
and virtual ports between the WSSs in a Mobility Domain allow users to roam without any disruption to network
connectivity.
(If your Mobility Domain uses firewalls or access controls between WSSs or AAA servers, see “Traffic ports used by
WSS software” on page 801 for the ports typically used in a Mobility Domain.)

About the Mobility Domain feature

A Mobility Domain enables users to roam geographically across the system while maintaining their data sessions and
VLAN or subnet membership, including IP address, regardless of how the WSSs are attached to the network backbone.
As users move from one area of a building or campus to another, their association with servers or other resources
appears the same.
About the Mobility Domain feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Configuring a Mobility Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Configuring secure WSS to WSS communications . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Monitoring the VLANs and tunnels in a Mobility Domain . . . . . . . . . . . . . . . . . . . . 226
Understanding the sessions of roaming users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Mobility Domain scenario . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Note. Nortel recommends that you run the same WSS Software version on all the WSSs
in a Mobility Domain.
Note. If the connection between the WSS in a mobility-domain is down and is brought up
later on, it can take upto 5 minutes for the WSS to connect back again due to exponential
backoff by the WSS.